./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.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_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/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_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/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_16b8e61b-7ccb-422f-b951-fb1e91513ae2/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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:52:12,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:52:12,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:52:12,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:52:12,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:52:12,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:52:12,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:52:12,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:52:12,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:52:12,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:52:12,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:52:12,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:52:12,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:52:12,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:52:12,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:52:12,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:52:12,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:52:12,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:52:12,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:52:12,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:52:12,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:52:12,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:52:12,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:52:12,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:52:12,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:52:12,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:52:12,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:52:12,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:52:12,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:52:12,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:52:12,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:52:12,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:52:12,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:52:12,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:52:12,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:52:12,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:52:12,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:52:12,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:52:12,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:52:12,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:52:12,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:52:12,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:52:12,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:52:12,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:52:12,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:52:12,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:52:12,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:52:12,830 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:52:12,831 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:52:12,831 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:52:12,831 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:52:12,831 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:52:12,832 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:52:12,832 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:52:12,832 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:52:12,832 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:52:12,832 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:52:12,833 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:52:12,833 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:52:12,837 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:52:12,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:52:12,838 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:52:12,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:52:12,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:52:12,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:52:12,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:52:12,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:52:12,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:52:12,839 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:52:12,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:52:12,840 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:52:12,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:52:12,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:52:12,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:52:12,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:52:12,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:52:12,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:52:12,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:52:12,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:52:12,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:52:12,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:52:12,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:52:12,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:52:12,845 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_16b8e61b-7ccb-422f-b951-fb1e91513ae2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-20 23:52:13,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:52:13,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:52:13,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:52:13,116 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:52:13,118 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:52:13,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-20 23:52:13,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/data/3982851a8/2715ddc05a534a01869df6b167e444d4/FLAG8c30a8c07 [2021-11-20 23:52:13,869 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:52:13,882 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-20 23:52:13,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/data/3982851a8/2715ddc05a534a01869df6b167e444d4/FLAG8c30a8c07 [2021-11-20 23:52:14,062 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/data/3982851a8/2715ddc05a534a01869df6b167e444d4 [2021-11-20 23:52:14,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:52:14,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:52:14,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:52:14,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:52:14,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:52:14,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:14" (1/1) ... [2021-11-20 23:52:14,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23816461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:14, skipping insertion in model container [2021-11-20 23:52:14,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:14" (1/1) ... [2021-11-20 23:52:14,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:52:14,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:52:14,719 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_16b8e61b-7ccb-422f-b951-fb1e91513ae2/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-20 23:52:14,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:52:14,815 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:52:14,942 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_16b8e61b-7ccb-422f-b951-fb1e91513ae2/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-20 23:52:15,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:52:15,048 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:52:15,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15 WrapperNode [2021-11-20 23:52:15,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:52:15,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:52:15,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:52:15,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:52:15,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,208 INFO L137 Inliner]: procedures = 96, calls = 347, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1123 [2021-11-20 23:52:15,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:52:15,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:52:15,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:52:15,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:52:15,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:52:15,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:52:15,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:52:15,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:52:15,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (1/1) ... [2021-11-20 23:52:15,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:52:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:15,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:52:15,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:52:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 23:52:15,435 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 23:52:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:52:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 23:52:15,435 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 23:52:15,435 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 23:52:15,436 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 23:52:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-20 23:52:15,436 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-20 23:52:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 23:52:15,436 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 23:52:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-20 23:52:15,437 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-20 23:52:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 23:52:15,437 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 23:52:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 23:52:15,437 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 23:52:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 23:52:15,437 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 23:52:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 23:52:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 23:52:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 23:52:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 23:52:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 23:52:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 23:52:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 23:52:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 23:52:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 23:52:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 23:52:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 23:52:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 23:52:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 23:52:15,440 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 23:52:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 23:52:15,440 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 23:52:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 23:52:15,440 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 23:52:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 23:52:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 23:52:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 23:52:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 23:52:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 23:52:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 23:52:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:52:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 23:52:15,442 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 23:52:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 23:52:15,442 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 23:52:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 23:52:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 23:52:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:52:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:52:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 23:52:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 23:52:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-20 23:52:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-20 23:52:15,621 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:52:15,640 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:52:16,764 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:52:17,429 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:52:17,430 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:52:17,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:17 BoogieIcfgContainer [2021-11-20 23:52:17,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:52:17,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:52:17,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:52:17,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:52:17,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:52:14" (1/3) ... [2021-11-20 23:52:17,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d3157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:17, skipping insertion in model container [2021-11-20 23:52:17,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:15" (2/3) ... [2021-11-20 23:52:17,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d3157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:17, skipping insertion in model container [2021-11-20 23:52:17,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:17" (3/3) ... [2021-11-20 23:52:17,448 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2021-11-20 23:52:17,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:52:17,458 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:52:17,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:52:17,542 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 23:52:17,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:52:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-20 23:52:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:52:17,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:17,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:17,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1418182962, now seen corresponding path program 1 times [2021-11-20 23:52:17,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:17,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323001423] [2021-11-20 23:52:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:17,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:52:18,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323001423] [2021-11-20 23:52:18,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323001423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:18,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:18,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:52:18,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173108206] [2021-11-20 23:52:18,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:18,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:52:18,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:52:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:52:18,385 INFO L87 Difference]: Start difference. First operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 23:52:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:20,572 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2021-11-20 23:52:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:52:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2021-11-20 23:52:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:20,605 INFO L225 Difference]: With dead ends: 1260 [2021-11-20 23:52:20,605 INFO L226 Difference]: Without dead ends: 887 [2021-11-20 23:52:20,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:52:20,620 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 1220 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:20,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 1401 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 23:52:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-11-20 23:52:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2021-11-20 23:52:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 559 states have (on average 1.5992844364937389) internal successors, (894), 589 states have internal predecessors, (894), 195 states have call successors, (195), 44 states have call predecessors, (195), 45 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2021-11-20 23:52:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2021-11-20 23:52:20,803 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2021-11-20 23:52:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:20,804 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2021-11-20 23:52:20,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 23:52:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2021-11-20 23:52:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 23:52:20,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:20,819 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 23:52:20,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:52:20,820 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash -764672404, now seen corresponding path program 1 times [2021-11-20 23:52:20,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:20,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872760950] [2021-11-20 23:52:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:20,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:21,143 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 23:52:21,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872760950] [2021-11-20 23:52:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872760950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:21,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:21,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:52:21,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668071506] [2021-11-20 23:52:21,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:21,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:52:21,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:52:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:52:21,150 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:52:24,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:24,882 INFO L93 Difference]: Finished difference Result 2754 states and 4471 transitions. [2021-11-20 23:52:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 23:52:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2021-11-20 23:52:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:24,910 INFO L225 Difference]: With dead ends: 2754 [2021-11-20 23:52:24,910 INFO L226 Difference]: Without dead ends: 1977 [2021-11-20 23:52:24,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:52:24,921 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 1347 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 4776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:24,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1423 Valid, 2593 Invalid, 4776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 4048 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 23:52:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-11-20 23:52:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1790. [2021-11-20 23:52:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1214 states have (on average 1.57166392092257) internal successors, (1908), 1286 states have internal predecessors, (1908), 482 states have call successors, (482), 81 states have call predecessors, (482), 93 states have return successors, (501), 455 states have call predecessors, (501), 477 states have call successors, (501) [2021-11-20 23:52:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2891 transitions. [2021-11-20 23:52:25,158 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2891 transitions. Word has length 98 [2021-11-20 23:52:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 1790 states and 2891 transitions. [2021-11-20 23:52:25,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:52:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2891 transitions. [2021-11-20 23:52:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 23:52:25,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:25,166 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, 1] [2021-11-20 23:52:25,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:52:25,167 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1174486611, now seen corresponding path program 1 times [2021-11-20 23:52:25,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:25,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75158716] [2021-11-20 23:52:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:25,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:25,458 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 23:52:25,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75158716] [2021-11-20 23:52:25,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75158716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:25,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:25,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:52:25,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594820760] [2021-11-20 23:52:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:25,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:52:25,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:52:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:52:25,464 INFO L87 Difference]: Start difference. First operand 1790 states and 2891 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:52:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:27,766 INFO L93 Difference]: Finished difference Result 4525 states and 7322 transitions. [2021-11-20 23:52:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:52:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2021-11-20 23:52:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:27,798 INFO L225 Difference]: With dead ends: 4525 [2021-11-20 23:52:27,798 INFO L226 Difference]: Without dead ends: 2760 [2021-11-20 23:52:27,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 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 23:52:27,814 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 1147 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:27,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 1945 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 23:52:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-11-20 23:52:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2642. [2021-11-20 23:52:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1818 states have (on average 1.5792079207920793) internal successors, (2871), 1917 states have internal predecessors, (2871), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2021-11-20 23:52:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4262 transitions. [2021-11-20 23:52:28,095 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4262 transitions. Word has length 99 [2021-11-20 23:52:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:28,096 INFO L470 AbstractCegarLoop]: Abstraction has 2642 states and 4262 transitions. [2021-11-20 23:52:28,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:52:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4262 transitions. [2021-11-20 23:52:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 23:52:28,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:28,101 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, 1, 1, 1, 1, 1] [2021-11-20 23:52:28,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:52:28,102 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1902471947, now seen corresponding path program 1 times [2021-11-20 23:52:28,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:28,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104255819] [2021-11-20 23:52:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:28,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:28,321 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 23:52:28,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:28,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104255819] [2021-11-20 23:52:28,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104255819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:28,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:28,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:52:28,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611643538] [2021-11-20 23:52:28,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:28,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:52:28,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:52:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:52:28,327 INFO L87 Difference]: Start difference. First operand 2642 states and 4262 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:52:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:29,073 INFO L93 Difference]: Finished difference Result 2743 states and 4428 transitions. [2021-11-20 23:52:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:52:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2021-11-20 23:52:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:29,107 INFO L225 Difference]: With dead ends: 2743 [2021-11-20 23:52:29,108 INFO L226 Difference]: Without dead ends: 2728 [2021-11-20 23:52:29,111 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 23:52:29,123 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 697 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:29,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1505 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:52:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-11-20 23:52:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2648. [2021-11-20 23:52:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1824 states have (on average 1.5773026315789473) internal successors, (2877), 1923 states have internal predecessors, (2877), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2021-11-20 23:52:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4268 transitions. [2021-11-20 23:52:29,434 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4268 transitions. Word has length 103 [2021-11-20 23:52:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:29,438 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 4268 transitions. [2021-11-20 23:52:29,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:52:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4268 transitions. [2021-11-20 23:52:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 23:52:29,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:29,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:29,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:52:29,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash 479288806, now seen corresponding path program 1 times [2021-11-20 23:52:29,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449660673] [2021-11-20 23:52:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:29,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:29,666 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 23:52:29,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:29,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449660673] [2021-11-20 23:52:29,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449660673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:29,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:29,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 23:52:29,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256671795] [2021-11-20 23:52:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:29,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:52:29,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:52:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:52:29,669 INFO L87 Difference]: Start difference. First operand 2648 states and 4268 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 23:52:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:35,623 INFO L93 Difference]: Finished difference Result 3073 states and 4910 transitions. [2021-11-20 23:52:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 23:52:35,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2021-11-20 23:52:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:35,649 INFO L225 Difference]: With dead ends: 3073 [2021-11-20 23:52:35,649 INFO L226 Difference]: Without dead ends: 3056 [2021-11-20 23:52:35,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 23:52:35,653 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 2642 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 8367 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2668 SdHoareTripleChecker+Valid, 4369 SdHoareTripleChecker+Invalid, 9977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 8367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:35,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2668 Valid, 4369 Invalid, 9977 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1610 Valid, 8367 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 23:52:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-11-20 23:52:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2836. [2021-11-20 23:52:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 1966 states have (on average 1.5768056968463886) internal successors, (3100), 2063 states have internal predecessors, (3100), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2021-11-20 23:52:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4529 transitions. [2021-11-20 23:52:35,848 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4529 transitions. Word has length 108 [2021-11-20 23:52:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:35,848 INFO L470 AbstractCegarLoop]: Abstraction has 2836 states and 4529 transitions. [2021-11-20 23:52:35,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 23:52:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4529 transitions. [2021-11-20 23:52:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 23:52:35,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:35,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:35,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:52:35,854 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:35,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2043443387, now seen corresponding path program 1 times [2021-11-20 23:52:35,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:35,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603984830] [2021-11-20 23:52:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:35,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:52:37,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:37,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603984830] [2021-11-20 23:52:37,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603984830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:52:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575067797] [2021-11-20 23:52:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:37,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:37,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:37,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:37,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:52:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:52:37,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:38,087 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 23:52:38,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:52:38,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575067797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:38,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:52:38,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [33] total 35 [2021-11-20 23:52:38,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128559113] [2021-11-20 23:52:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:38,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:52:38,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:38,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:52:38,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 23:52:38,089 INFO L87 Difference]: Start difference. First operand 2836 states and 4529 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-20 23:52:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:38,391 INFO L93 Difference]: Finished difference Result 2999 states and 4796 transitions. [2021-11-20 23:52:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:52:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2021-11-20 23:52:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:38,417 INFO L225 Difference]: With dead ends: 2999 [2021-11-20 23:52:38,417 INFO L226 Difference]: Without dead ends: 2984 [2021-11-20 23:52:38,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 23:52:38,423 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 47 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1766 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 23:52:38,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1766 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:52:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2021-11-20 23:52:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2850. [2021-11-20 23:52:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 1980 states have (on average 1.5727272727272728) internal successors, (3114), 2077 states have internal predecessors, (3114), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2021-11-20 23:52:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 4543 transitions. [2021-11-20 23:52:38,639 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 4543 transitions. Word has length 115 [2021-11-20 23:52:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:38,641 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 4543 transitions. [2021-11-20 23:52:38,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-20 23:52:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 4543 transitions. [2021-11-20 23:52:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 23:52:38,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:38,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:38,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:52:38,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 23:52:38,867 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash 210888616, now seen corresponding path program 1 times [2021-11-20 23:52:38,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:38,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980752751] [2021-11-20 23:52:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:38,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:39,380 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 23:52:39,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980752751] [2021-11-20 23:52:39,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980752751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:52:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272221397] [2021-11-20 23:52:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:39,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:39,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:39,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:39,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b8e61b-7ccb-422f-b951-fb1e91513ae2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:52:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 23:52:39,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:42,342 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 23:52:42,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:29,372 WARN L227 SmtUtils]: Spent 42.21s on a formula simplification. DAG size of input: 1449 DAG size of output: 59 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-20 23:54:10,994 WARN L227 SmtUtils]: Spent 41.06s on a formula simplification. DAG size of input: 1449 DAG size of output: 59 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-20 23:54:11,714 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 23:54:11,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272221397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:54:11,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986004641] [2021-11-20 23:54:11,739 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2021-11-20 23:54:11,739 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:54:11,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:54:11,749 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:54:11,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:55:22,062 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 453 for LOIs [2021-11-20 23:55:23,726 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 594 for LOIs [2021-11-20 23:57:41,310 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 594 for LOIs [2021-11-21 00:00:27,918 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 588 for LOIs [2021-11-21 00:02:36,306 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2021-11-21 00:03:16,669 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 497 for LOIs [2021-11-21 00:03:47,278 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 44 for LOIs [2021-11-21 00:03:47,434 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 445 for LOIs [2021-11-21 00:03:49,380 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 50 for LOIs [2021-11-21 00:03:49,491 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 599 for LOIs