./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P --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 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:12:36,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:12:36,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:12:36,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:12:36,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:12:36,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:12:36,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:12:36,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:12:36,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:12:36,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:12:36,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:12:36,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:12:36,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:12:36,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:12:36,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:12:36,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:12:36,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:12:36,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:12:36,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:12:36,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:12:36,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:12:36,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:12:36,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:12:36,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:12:36,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:12:36,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:12:36,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:12:36,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:12:36,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:12:36,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:12:36,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:12:36,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:12:36,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:12:36,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:12:36,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:12:36,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:12:36,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:12:36,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:12:36,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:12:36,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:12:36,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:12:36,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:12:36,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:12:36,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:12:36,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:12:36,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:12:36,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:12:36,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:12:36,621 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:12:36,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:12:36,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:12:36,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:12:36,623 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:12:36,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:12:36,623 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:12:36,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:12:36,624 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:12:36,624 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:12:36,624 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:12:36,624 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:12:36,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:12:36,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:12:36,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:12:36,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:12:36,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:12:36,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:12:36,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:12:36,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:12:36,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:12:36,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:12:36,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:12:36,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:12:36,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:12:36,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:12:36,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:36,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:12:36,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:12:36,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:12:36,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:12:36,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:12:36,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:12:36,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:12:36,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:12:36,632 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d [2021-11-20 23:12:36,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:12:36,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:12:36,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:12:36,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:12:36,971 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:12:36,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-20 23:12:37,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/data/ebcb70a45/bb0c7ef1dc194860bacb3c59bf01602f/FLAGdba0e0d8d [2021-11-20 23:12:37,730 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:12:37,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-20 23:12:37,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/data/ebcb70a45/bb0c7ef1dc194860bacb3c59bf01602f/FLAGdba0e0d8d [2021-11-20 23:12:37,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/data/ebcb70a45/bb0c7ef1dc194860bacb3c59bf01602f [2021-11-20 23:12:37,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:12:37,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:12:37,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:37,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:12:37,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:12:37,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:37" (1/1) ... [2021-11-20 23:12:37,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2e4093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37, skipping insertion in model container [2021-11-20 23:12:37,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:37" (1/1) ... [2021-11-20 23:12:37,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:12:38,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:12:38,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-20 23:12:38,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:38,608 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:12:38,748 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-20 23:12:38,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:38,815 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:12:38,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38 WrapperNode [2021-11-20 23:12:38,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:38,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:38,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:12:38,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:12:38,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,916 INFO L137 Inliner]: procedures = 94, calls = 341, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1108 [2021-11-20 23:12:38,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:38,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:12:38,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:12:38,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:12:38,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:39,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:39,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:12:39,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:12:39,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:12:39,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:12:39,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:39,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:39,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:12:39,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:12:39,132 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 23:12:39,132 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 23:12:39,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:12:39,132 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 23:12:39,133 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 23:12:39,133 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 23:12:39,133 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 23:12:39,133 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-20 23:12:39,133 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-20 23:12:39,133 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 23:12:39,134 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 23:12:39,134 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-20 23:12:39,134 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-20 23:12:39,134 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 23:12:39,134 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 23:12:39,134 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 23:12:39,135 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 23:12:39,135 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 23:12:39,135 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 23:12:39,135 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 23:12:39,135 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 23:12:39,135 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 23:12:39,136 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 23:12:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 23:12:39,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 23:12:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 23:12:39,136 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 23:12:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 23:12:39,137 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 23:12:39,137 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 23:12:39,137 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 23:12:39,137 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 23:12:39,137 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 23:12:39,137 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 23:12:39,138 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 23:12:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 23:12:39,138 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 23:12:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 23:12:39,138 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 23:12:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 23:12:39,138 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 23:12:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 23:12:39,139 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 23:12:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:12:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 23:12:39,139 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 23:12:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 23:12:39,140 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 23:12:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 23:12:39,140 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 23:12:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:12:39,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:12:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 23:12:39,140 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 23:12:39,300 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:12:39,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:12:40,522 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:12:41,155 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:12:41,156 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:12:41,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:41 BoogieIcfgContainer [2021-11-20 23:12:41,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:12:41,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:12:41,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:12:41,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:12:41,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:37" (1/3) ... [2021-11-20 23:12:41,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4591fe68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:41, skipping insertion in model container [2021-11-20 23:12:41,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (2/3) ... [2021-11-20 23:12:41,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4591fe68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:41, skipping insertion in model container [2021-11-20 23:12:41,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:41" (3/3) ... [2021-11-20 23:12:41,172 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product19.cil.c [2021-11-20 23:12:41,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:12:41,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:12:41,246 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:12:41,252 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:12:41,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:12:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-20 23:12:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 23:12:41,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:41,305 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:41,306 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -98102543, now seen corresponding path program 1 times [2021-11-20 23:12:41,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:41,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525071088] [2021-11-20 23:12:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:41,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:12:41,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:41,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525071088] [2021-11-20 23:12:41,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525071088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:41,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:41,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:12:41,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114637272] [2021-11-20 23:12:41,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:41,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:12:41,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:12:41,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:12:42,000 INFO L87 Difference]: Start difference. First operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 23:12:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:42,199 INFO L93 Difference]: Finished difference Result 399 states and 630 transitions. [2021-11-20 23:12:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:12:42,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2021-11-20 23:12:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:42,226 INFO L225 Difference]: With dead ends: 399 [2021-11-20 23:12:42,227 INFO L226 Difference]: Without dead ends: 377 [2021-11-20 23:12:42,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:12:42,234 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:42,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 560 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:12:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-20 23:12:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-20 23:12:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 253 states have (on average 1.5770750988142292) internal successors, (399), 272 states have internal predecessors, (399), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-20 23:12:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 592 transitions. [2021-11-20 23:12:42,365 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 592 transitions. Word has length 88 [2021-11-20 23:12:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:42,368 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 592 transitions. [2021-11-20 23:12:42,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-20 23:12:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 592 transitions. [2021-11-20 23:12:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 23:12:42,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:42,390 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:42,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:12:42,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2091135567, now seen corresponding path program 1 times [2021-11-20 23:12:42,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511588628] [2021-11-20 23:12:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:42,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:12:42,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:42,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511588628] [2021-11-20 23:12:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511588628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:42,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:42,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:12:42,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070445773] [2021-11-20 23:12:42,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:42,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:12:42,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:12:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:12:42,670 INFO L87 Difference]: Start difference. First operand 377 states and 592 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 23:12:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:44,848 INFO L93 Difference]: Finished difference Result 1148 states and 1837 transitions. [2021-11-20 23:12:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:12:44,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2021-11-20 23:12:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:44,857 INFO L225 Difference]: With dead ends: 1148 [2021-11-20 23:12:44,857 INFO L226 Difference]: Without dead ends: 794 [2021-11-20 23:12:44,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:12:44,864 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1135 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:44,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 1892 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 23:12:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-20 23:12:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 745. [2021-11-20 23:12:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 510 states have (on average 1.592156862745098) internal successors, (812), 543 states have internal predecessors, (812), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2021-11-20 23:12:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1191 transitions. [2021-11-20 23:12:44,947 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1191 transitions. Word has length 89 [2021-11-20 23:12:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:44,948 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1191 transitions. [2021-11-20 23:12:44,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 23:12:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1191 transitions. [2021-11-20 23:12:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 23:12:44,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:44,953 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:44,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:12:44,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:44,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1892573109, now seen corresponding path program 1 times [2021-11-20 23:12:44,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:44,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993387891] [2021-11-20 23:12:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:44,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:12:45,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:45,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993387891] [2021-11-20 23:12:45,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993387891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:45,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:45,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:12:45,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772974941] [2021-11-20 23:12:45,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:45,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:12:45,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:12:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:12:45,263 INFO L87 Difference]: Start difference. First operand 745 states and 1191 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:12:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:45,815 INFO L93 Difference]: Finished difference Result 816 states and 1303 transitions. [2021-11-20 23:12:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:12:45,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2021-11-20 23:12:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:45,824 INFO L225 Difference]: With dead ends: 816 [2021-11-20 23:12:45,825 INFO L226 Difference]: Without dead ends: 801 [2021-11-20 23:12:45,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:12:45,827 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 684 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:45,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1494 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:12:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-11-20 23:12:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 749. [2021-11-20 23:12:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.5875486381322956) internal successors, (816), 547 states have internal predecessors, (816), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2021-11-20 23:12:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1195 transitions. [2021-11-20 23:12:45,890 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1195 transitions. Word has length 93 [2021-11-20 23:12:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:45,891 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1195 transitions. [2021-11-20 23:12:45,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:12:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1195 transitions. [2021-11-20 23:12:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 23:12:45,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:45,894 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:12:45,894 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1844224197, now seen corresponding path program 1 times [2021-11-20 23:12:45,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527783752] [2021-11-20 23:12:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:45,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:12:46,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527783752] [2021-11-20 23:12:46,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527783752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:46,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:46,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:12:46,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435265571] [2021-11-20 23:12:46,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:12:46,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:12:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:46,020 INFO L87 Difference]: Start difference. First operand 749 states and 1195 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 23:12:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:46,188 INFO L93 Difference]: Finished difference Result 768 states and 1219 transitions. [2021-11-20 23:12:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:12:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2021-11-20 23:12:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:46,197 INFO L225 Difference]: With dead ends: 768 [2021-11-20 23:12:46,197 INFO L226 Difference]: Without dead ends: 753 [2021-11-20 23:12:46,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:12:46,226 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 30 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:46,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2200 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:12:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-20 23:12:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 749. [2021-11-20 23:12:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.583657587548638) internal successors, (814), 547 states have internal predecessors, (814), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2021-11-20 23:12:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1193 transitions. [2021-11-20 23:12:46,278 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1193 transitions. Word has length 98 [2021-11-20 23:12:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:46,279 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1193 transitions. [2021-11-20 23:12:46,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 23:12:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1193 transitions. [2021-11-20 23:12:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 23:12:46,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:46,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:46,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:12:46,283 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash -296829178, now seen corresponding path program 1 times [2021-11-20 23:12:46,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486285813] [2021-11-20 23:12:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:46,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:12:46,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486285813] [2021-11-20 23:12:46,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486285813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:12:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594133670] [2021-11-20 23:12:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:46,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:46,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:46,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:46,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:12:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:46,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:12:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 23:12:47,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:12:47,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594133670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:47,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:12:47,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2021-11-20 23:12:47,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203787735] [2021-11-20 23:12:47,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:47,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:47,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:12:47,416 INFO L87 Difference]: Start difference. First operand 749 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 23:12:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:47,582 INFO L93 Difference]: Finished difference Result 832 states and 1317 transitions. [2021-11-20 23:12:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:12:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2021-11-20 23:12:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:47,593 INFO L225 Difference]: With dead ends: 832 [2021-11-20 23:12:47,593 INFO L226 Difference]: Without dead ends: 817 [2021-11-20 23:12:47,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:12:47,600 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 44 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:47,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1729 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:12:47,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-11-20 23:12:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 753. [2021-11-20 23:12:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 518 states have (on average 1.579150579150579) internal successors, (818), 551 states have internal predecessors, (818), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2021-11-20 23:12:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1197 transitions. [2021-11-20 23:12:47,666 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1197 transitions. Word has length 105 [2021-11-20 23:12:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:47,667 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1197 transitions. [2021-11-20 23:12:47,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 23:12:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1197 transitions. [2021-11-20 23:12:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 23:12:47,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:47,672 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:47,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:12:47,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:47,894 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1587849353, now seen corresponding path program 1 times [2021-11-20 23:12:47,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:47,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873240562] [2021-11-20 23:12:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:47,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 23:12:48,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:48,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873240562] [2021-11-20 23:12:48,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873240562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:12:48,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163845546] [2021-11-20 23:12:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:48,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:48,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:48,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2566bc-5ec1-49e4-9230-8497d1683515/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:12:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-20 23:12:48,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:12:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:36,134 WARN L227 SmtUtils]: Spent 41.19s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-20 23:14:17,014 WARN L227 SmtUtils]: Spent 40.40s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-20 23:14:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 23:14:17,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163845546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:14:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567565808] [2021-11-20 23:14:17,749 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2021-11-20 23:14:17,749 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:14:17,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:14:17,760 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:14:17,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:21,631 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 447 for LOIs [2021-11-20 23:15:23,213 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 586 for LOIs [2021-11-20 23:17:31,497 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 586 for LOIs [2021-11-20 23:22:40,203 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 456 for LOIs [2021-11-20 23:23:19,868 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 499 for LOIs [2021-11-20 23:23:48,853 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2021-11-20 23:23:49,036 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 95 for LOIs [2021-11-20 23:23:49,403 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 593 for LOIs [2021-11-20 23:24:38,810 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 423 for LOIs [2021-11-20 23:24:40,258 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 456 for LOIs [2021-11-20 23:25:00,038 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 452 for LOIs