./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:34:17,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:34:17,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:34:17,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:34:17,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:34:17,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:34:17,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:34:17,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:34:17,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:34:17,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:34:17,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:34:17,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:34:17,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:34:17,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:34:17,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:34:17,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:34:17,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:34:17,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:34:17,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:34:17,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:34:17,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:34:17,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:34:17,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:34:17,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:34:17,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:34:17,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:34:17,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:34:17,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:34:17,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:34:17,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:34:17,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:34:17,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:34:17,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:34:17,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:34:17,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:34:17,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:34:17,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:34:17,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:34:17,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:34:17,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:34:17,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:34:17,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:34:17,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:34:17,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:34:17,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:34:17,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:34:17,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:34:17,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:34:17,760 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:34:17,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:34:17,760 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:34:17,760 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:34:17,760 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:34:17,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:34:17,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:34:17,761 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:34:17,761 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:34:17,761 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:34:17,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:34:17,761 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:34:17,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:34:17,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:34:17,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:34:17,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:34:17,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:34:17,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:34:17,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:34:17,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:34:17,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:34:17,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:34:17,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:34:17,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:34:17,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:34:17,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:34:17,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:34:17,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:34:17,764 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:34:17,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:34:17,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:34:17,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:34:17,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:34:17,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:34:17,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:34:17,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef17cfb4a2c8358ea255253edc0610051a64c94a86cd92ff89d3b074c51925f6 [2022-12-14 11:34:17,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:34:17,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:34:17,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:34:17,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:34:17,959 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:34:17,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2022-12-14 11:34:20,573 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:34:20,795 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:34:20,795 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c [2022-12-14 11:34:20,807 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/data/e744bc488/b881f11839f745f7b6bb8d1175875eb5/FLAGa29245670 [2022-12-14 11:34:20,818 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/data/e744bc488/b881f11839f745f7b6bb8d1175875eb5 [2022-12-14 11:34:20,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:34:20,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:34:20,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:34:20,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:34:20,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:34:20,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:20" (1/1) ... [2022-12-14 11:34:20,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d162b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:20, skipping insertion in model container [2022-12-14 11:34:20,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:20" (1/1) ... [2022-12-14 11:34:20,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:34:20,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:34:20,992 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2022-12-14 11:34:21,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:34:21,197 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:34:21,206 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/sv-benchmarks/c/product-lines/elevator_spec13_product23.cil.c[1811,1824] [2022-12-14 11:34:21,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:34:21,300 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:34:21,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21 WrapperNode [2022-12-14 11:34:21,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:34:21,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:34:21,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:34:21,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:34:21,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,358 INFO L138 Inliner]: procedures = 94, calls = 346, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 873 [2022-12-14 11:34:21,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:34:21,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:34:21,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:34:21,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:34:21,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:34:21,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:34:21,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:34:21,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:34:21,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (1/1) ... [2022-12-14 11:34:21,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:34:21,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:21,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:34:21,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:34:21,485 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-12-14 11:34:21,485 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-12-14 11:34:21,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:34:21,485 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 11:34:21,485 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 11:34:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 11:34:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 11:34:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 11:34:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 11:34:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-12-14 11:34:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-12-14 11:34:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:34:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:34:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 11:34:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 11:34:21,486 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:34:21,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:34:21,487 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 11:34:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 11:34:21,487 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:34:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:34:21,487 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:34:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:34:21,487 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:34:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:34:21,487 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:34:21,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:34:21,487 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:34:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:34:21,488 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:34:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:34:21,488 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:34:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:34:21,488 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:34:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:34:21,488 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:34:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:34:21,488 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:34:21,488 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:34:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:34:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:34:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:34:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:34:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:34:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:34:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:34:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 11:34:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 11:34:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:34:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:34:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:34:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:34:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:34:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:34:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 11:34:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 11:34:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:34:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:34:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:34:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:34:21,609 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:34:21,611 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:34:22,397 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:34:22,808 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:34:22,808 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 11:34:22,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:22 BoogieIcfgContainer [2022-12-14 11:34:22,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:34:22,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:34:22,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:34:22,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:34:22,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:34:20" (1/3) ... [2022-12-14 11:34:22,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50de7aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:22, skipping insertion in model container [2022-12-14 11:34:22,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:21" (2/3) ... [2022-12-14 11:34:22,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50de7aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:22, skipping insertion in model container [2022-12-14 11:34:22,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:22" (3/3) ... [2022-12-14 11:34:22,817 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2022-12-14 11:34:22,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:34:22,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:34:22,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:34:22,881 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@63358e8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:34:22,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:34:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 436 states, 298 states have (on average 1.5771812080536913) internal successors, (470), 316 states have internal predecessors, (470), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-14 11:34:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 11:34:22,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:22,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:22,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:22,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash 768095820, now seen corresponding path program 1 times [2022-12-14 11:34:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:22,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558314222] [2022-12-14 11:34:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:34:23,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:23,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558314222] [2022-12-14 11:34:23,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558314222] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:23,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:23,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:34:23,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859262116] [2022-12-14 11:34:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:23,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:34:23,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:34:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:34:23,414 INFO L87 Difference]: Start difference. First operand has 436 states, 298 states have (on average 1.5771812080536913) internal successors, (470), 316 states have internal predecessors, (470), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 11:34:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:24,080 INFO L93 Difference]: Finished difference Result 1276 states and 2046 transitions. [2022-12-14 11:34:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:34:24,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-12-14 11:34:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:24,101 INFO L225 Difference]: With dead ends: 1276 [2022-12-14 11:34:24,101 INFO L226 Difference]: Without dead ends: 845 [2022-12-14 11:34:24,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:34:24,112 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 650 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 3043 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:24,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 3043 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:34:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-12-14 11:34:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 837. [2022-12-14 11:34:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 579 states have (on average 1.5613126079447324) internal successors, (904), 609 states have internal predecessors, (904), 206 states have call successors, (206), 54 states have call predecessors, (206), 51 states have return successors, (210), 198 states have call predecessors, (210), 202 states have call successors, (210) [2022-12-14 11:34:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1320 transitions. [2022-12-14 11:34:24,198 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1320 transitions. Word has length 96 [2022-12-14 11:34:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:24,198 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 1320 transitions. [2022-12-14 11:34:24,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 11:34:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1320 transitions. [2022-12-14 11:34:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 11:34:24,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:24,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:24,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:34:24,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:24,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash -319815266, now seen corresponding path program 1 times [2022-12-14 11:34:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:24,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888460583] [2022-12-14 11:34:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:24,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:34:24,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:24,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888460583] [2022-12-14 11:34:24,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888460583] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:24,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134226583] [2022-12-14 11:34:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:24,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:24,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:24,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:34:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:34:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:34:24,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:24,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134226583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:24,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:24,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-14 11:34:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993866203] [2022-12-14 11:34:24,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:34:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:34:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:34:24,646 INFO L87 Difference]: Start difference. First operand 837 states and 1320 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:24,829 INFO L93 Difference]: Finished difference Result 1671 states and 2655 transitions. [2022-12-14 11:34:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:34:24,829 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 100 [2022-12-14 11:34:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:24,834 INFO L225 Difference]: With dead ends: 1671 [2022-12-14 11:34:24,834 INFO L226 Difference]: Without dead ends: 849 [2022-12-14 11:34:24,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:34:24,840 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 85 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:24,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1791 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-12-14 11:34:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 849. [2022-12-14 11:34:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 589 states have (on average 1.5551782682512734) internal successors, (916), 619 states have internal predecessors, (916), 206 states have call successors, (206), 56 states have call predecessors, (206), 53 states have return successors, (210), 198 states have call predecessors, (210), 202 states have call successors, (210) [2022-12-14 11:34:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1332 transitions. [2022-12-14 11:34:24,880 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1332 transitions. Word has length 100 [2022-12-14 11:34:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:24,880 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1332 transitions. [2022-12-14 11:34:24,880 INFO L496 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1332 transitions. [2022-12-14 11:34:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 11:34:24,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:24,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:24,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:25,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:25,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1972101525, now seen corresponding path program 1 times [2022-12-14 11:34:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:25,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532305750] [2022-12-14 11:34:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:25,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:34:25,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:25,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532305750] [2022-12-14 11:34:25,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532305750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:25,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715621525] [2022-12-14 11:34:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:25,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:25,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:25,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:25,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:34:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:34:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:34:25,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:25,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715621525] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:25,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:25,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 11:34:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607627071] [2022-12-14 11:34:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:34:25,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:34:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:34:25,541 INFO L87 Difference]: Start difference. First operand 849 states and 1332 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:25,694 INFO L93 Difference]: Finished difference Result 1689 states and 2665 transitions. [2022-12-14 11:34:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:34:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2022-12-14 11:34:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:25,700 INFO L225 Difference]: With dead ends: 1689 [2022-12-14 11:34:25,700 INFO L226 Difference]: Without dead ends: 847 [2022-12-14 11:34:25,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:25,706 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 91 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:25,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1787 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-12-14 11:34:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2022-12-14 11:34:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 587 states have (on average 1.546848381601363) internal successors, (908), 617 states have internal predecessors, (908), 206 states have call successors, (206), 56 states have call predecessors, (206), 53 states have return successors, (210), 198 states have call predecessors, (210), 202 states have call successors, (210) [2022-12-14 11:34:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1324 transitions. [2022-12-14 11:34:25,760 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1324 transitions. Word has length 102 [2022-12-14 11:34:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:25,761 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1324 transitions. [2022-12-14 11:34:25,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1324 transitions. [2022-12-14 11:34:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 11:34:25,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:25,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:25,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:25,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:25,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1886580511, now seen corresponding path program 1 times [2022-12-14 11:34:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381607784] [2022-12-14 11:34:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 11:34:26,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:26,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381607784] [2022-12-14 11:34:26,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381607784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:26,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810517014] [2022-12-14 11:34:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:26,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:26,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:34:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:34:26,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:34:26,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:26,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810517014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:26,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:26,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-12-14 11:34:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205791496] [2022-12-14 11:34:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:26,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:34:26,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:34:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:26,455 INFO L87 Difference]: Start difference. First operand 847 states and 1324 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:27,192 INFO L93 Difference]: Finished difference Result 2071 states and 3280 transitions. [2022-12-14 11:34:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:34:27,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 103 [2022-12-14 11:34:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:27,200 INFO L225 Difference]: With dead ends: 2071 [2022-12-14 11:34:27,201 INFO L226 Difference]: Without dead ends: 1239 [2022-12-14 11:34:27,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:34:27,208 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 642 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:27,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 2352 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:34:27,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-12-14 11:34:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1219. [2022-12-14 11:34:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 844 states have (on average 1.4928909952606635) internal successors, (1260), 889 states have internal predecessors, (1260), 294 states have call successors, (294), 84 states have call predecessors, (294), 80 states have return successors, (322), 282 states have call predecessors, (322), 289 states have call successors, (322) [2022-12-14 11:34:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1876 transitions. [2022-12-14 11:34:27,275 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1876 transitions. Word has length 103 [2022-12-14 11:34:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:27,275 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1876 transitions. [2022-12-14 11:34:27,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1876 transitions. [2022-12-14 11:34:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 11:34:27,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:27,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:27,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:34:27,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:27,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash -130362641, now seen corresponding path program 1 times [2022-12-14 11:34:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:27,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784420623] [2022-12-14 11:34:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:27,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:34:27,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:27,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784420623] [2022-12-14 11:34:27,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784420623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:27,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807532665] [2022-12-14 11:34:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:27,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:27,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:27,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:27,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:34:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:27,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:34:27,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 11:34:28,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:28,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807532665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:28,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:28,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 11:34:28,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671574814] [2022-12-14 11:34:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:28,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:34:28,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:34:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:34:28,088 INFO L87 Difference]: Start difference. First operand 1219 states and 1876 transitions. Second operand has 6 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:28,643 INFO L93 Difference]: Finished difference Result 2650 states and 4075 transitions. [2022-12-14 11:34:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:34:28,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 104 [2022-12-14 11:34:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:28,651 INFO L225 Difference]: With dead ends: 2650 [2022-12-14 11:34:28,651 INFO L226 Difference]: Without dead ends: 1446 [2022-12-14 11:34:28,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:34:28,656 INFO L413 NwaCegarLoop]: 909 mSDtfsCounter, 778 mSDsluCounter, 2544 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:28,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 3453 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:34:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-12-14 11:34:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1427. [2022-12-14 11:34:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1005 states have (on average 1.4796019900497512) internal successors, (1487), 1048 states have internal predecessors, (1487), 318 states have call successors, (318), 108 states have call predecessors, (318), 103 states have return successors, (373), 307 states have call predecessors, (373), 311 states have call successors, (373) [2022-12-14 11:34:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 2178 transitions. [2022-12-14 11:34:28,704 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 2178 transitions. Word has length 104 [2022-12-14 11:34:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:28,705 INFO L495 AbstractCegarLoop]: Abstraction has 1427 states and 2178 transitions. [2022-12-14 11:34:28,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 2178 transitions. [2022-12-14 11:34:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 11:34:28,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:28,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:28,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:34:28,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:28,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash -461333832, now seen corresponding path program 1 times [2022-12-14 11:34:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:28,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447871001] [2022-12-14 11:34:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:34:29,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:29,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447871001] [2022-12-14 11:34:29,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447871001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:29,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566007168] [2022-12-14 11:34:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:29,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:29,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:29,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:34:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:34:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:34:29,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:29,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566007168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:29,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:29,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-12-14 11:34:29,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736384230] [2022-12-14 11:34:29,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:29,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:34:29,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:34:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:29,374 INFO L87 Difference]: Start difference. First operand 1427 states and 2178 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:29,526 INFO L93 Difference]: Finished difference Result 2863 states and 4446 transitions. [2022-12-14 11:34:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:34:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 104 [2022-12-14 11:34:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:29,532 INFO L225 Difference]: With dead ends: 2863 [2022-12-14 11:34:29,532 INFO L226 Difference]: Without dead ends: 1459 [2022-12-14 11:34:29,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:29,538 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 2 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:29,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2541 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-12-14 11:34:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1439. [2022-12-14 11:34:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1014 states have (on average 1.47534516765286) internal successors, (1496), 1057 states have internal predecessors, (1496), 318 states have call successors, (318), 108 states have call predecessors, (318), 106 states have return successors, (376), 310 states have call predecessors, (376), 311 states have call successors, (376) [2022-12-14 11:34:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2190 transitions. [2022-12-14 11:34:29,595 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2190 transitions. Word has length 104 [2022-12-14 11:34:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:29,595 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 2190 transitions. [2022-12-14 11:34:29,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2190 transitions. [2022-12-14 11:34:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 11:34:29,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:29,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:29,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:34:29,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:34:29,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:29,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1336051169, now seen corresponding path program 1 times [2022-12-14 11:34:29,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:29,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257893340] [2022-12-14 11:34:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:29,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:34:29,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257893340] [2022-12-14 11:34:29,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257893340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673893400] [2022-12-14 11:34:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:29,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:29,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:34:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1375 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:34:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:34:30,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673893400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:30,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:30,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 11:34:30,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86767633] [2022-12-14 11:34:30,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:30,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:34:30,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:34:30,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:34:30,192 INFO L87 Difference]: Start difference. First operand 1439 states and 2190 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:30,447 INFO L93 Difference]: Finished difference Result 2929 states and 4525 transitions. [2022-12-14 11:34:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:34:30,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2022-12-14 11:34:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:30,457 INFO L225 Difference]: With dead ends: 2929 [2022-12-14 11:34:30,458 INFO L226 Difference]: Without dead ends: 1514 [2022-12-14 11:34:30,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:34:30,469 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 19 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:30,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1747 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:34:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-12-14 11:34:30,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1496. [2022-12-14 11:34:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1071 states have (on average 1.4836601307189543) internal successors, (1589), 1114 states have internal predecessors, (1589), 318 states have call successors, (318), 108 states have call predecessors, (318), 106 states have return successors, (376), 310 states have call predecessors, (376), 311 states have call successors, (376) [2022-12-14 11:34:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2283 transitions. [2022-12-14 11:34:30,540 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2283 transitions. Word has length 106 [2022-12-14 11:34:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:30,540 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2283 transitions. [2022-12-14 11:34:30,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2283 transitions. [2022-12-14 11:34:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 11:34:30,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:30,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:30,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:34:30,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:34:30,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:30,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:30,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1034295157, now seen corresponding path program 1 times [2022-12-14 11:34:30,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:30,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188066397] [2022-12-14 11:34:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:30,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:34:30,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188066397] [2022-12-14 11:34:30,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188066397] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627097750] [2022-12-14 11:34:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:30,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:30,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:30,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:30,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:34:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:34:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:34:31,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:31,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627097750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:31,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:31,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-12-14 11:34:31,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095320938] [2022-12-14 11:34:31,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:31,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:34:31,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:34:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:34:31,091 INFO L87 Difference]: Start difference. First operand 1496 states and 2283 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:31,791 INFO L93 Difference]: Finished difference Result 3578 states and 5662 transitions. [2022-12-14 11:34:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:34:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 108 [2022-12-14 11:34:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:31,805 INFO L225 Difference]: With dead ends: 3578 [2022-12-14 11:34:31,805 INFO L226 Difference]: Without dead ends: 2519 [2022-12-14 11:34:31,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:31,813 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 650 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:31,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 2419 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:34:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2022-12-14 11:34:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2466. [2022-12-14 11:34:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1767 states have (on average 1.4770797962648556) internal successors, (2610), 1836 states have internal predecessors, (2610), 520 states have call successors, (520), 180 states have call predecessors, (520), 178 states have return successors, (737), 510 states have call predecessors, (737), 509 states have call successors, (737) [2022-12-14 11:34:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 3867 transitions. [2022-12-14 11:34:31,918 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 3867 transitions. Word has length 108 [2022-12-14 11:34:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:31,919 INFO L495 AbstractCegarLoop]: Abstraction has 2466 states and 3867 transitions. [2022-12-14 11:34:31,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 3867 transitions. [2022-12-14 11:34:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 11:34:31,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:31,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:31,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:34:32,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:32,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:32,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1231009953, now seen corresponding path program 1 times [2022-12-14 11:34:32,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:32,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041510217] [2022-12-14 11:34:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:32,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:34:32,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041510217] [2022-12-14 11:34:32,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041510217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213063809] [2022-12-14 11:34:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:32,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:32,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:32,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:34:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:32,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:34:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:34:32,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:32,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213063809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:32,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:32,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-12-14 11:34:32,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704608276] [2022-12-14 11:34:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:32,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:34:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:34:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:34:32,439 INFO L87 Difference]: Start difference. First operand 2466 states and 3867 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:32,613 INFO L93 Difference]: Finished difference Result 4972 states and 7958 transitions. [2022-12-14 11:34:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:34:32,614 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 108 [2022-12-14 11:34:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:32,626 INFO L225 Difference]: With dead ends: 4972 [2022-12-14 11:34:32,626 INFO L226 Difference]: Without dead ends: 2530 [2022-12-14 11:34:32,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:34:32,636 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 4 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:32,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1873 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2022-12-14 11:34:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2476. [2022-12-14 11:34:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 1777 states have (on average 1.4642656162070906) internal successors, (2602), 1846 states have internal predecessors, (2602), 520 states have call successors, (520), 180 states have call predecessors, (520), 178 states have return successors, (737), 510 states have call predecessors, (737), 509 states have call successors, (737) [2022-12-14 11:34:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 3859 transitions. [2022-12-14 11:34:32,719 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 3859 transitions. Word has length 108 [2022-12-14 11:34:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:32,719 INFO L495 AbstractCegarLoop]: Abstraction has 2476 states and 3859 transitions. [2022-12-14 11:34:32,719 INFO L496 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:34:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 3859 transitions. [2022-12-14 11:34:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 11:34:32,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:32,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:32,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:34:32,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:32,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -386165106, now seen corresponding path program 1 times [2022-12-14 11:34:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:32,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782432226] [2022-12-14 11:34:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:34:33,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:33,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782432226] [2022-12-14 11:34:33,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782432226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:33,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091374846] [2022-12-14 11:34:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:33,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:33,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:33,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:33,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:34:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:34:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:34:33,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:33,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091374846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:33,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:33,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-12-14 11:34:33,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102291585] [2022-12-14 11:34:33,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:33,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:34:33,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:33,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:34:33,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:34:33,288 INFO L87 Difference]: Start difference. First operand 2476 states and 3859 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:33,882 INFO L93 Difference]: Finished difference Result 5527 states and 8868 transitions. [2022-12-14 11:34:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:34:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 109 [2022-12-14 11:34:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:33,900 INFO L225 Difference]: With dead ends: 5527 [2022-12-14 11:34:33,900 INFO L226 Difference]: Without dead ends: 3493 [2022-12-14 11:34:33,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:33,915 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 683 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:33,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2177 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:34:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2022-12-14 11:34:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 3444. [2022-12-14 11:34:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 2471 states have (on average 1.462161068393363) internal successors, (3613), 2566 states have internal predecessors, (3613), 722 states have call successors, (722), 252 states have call predecessors, (722), 250 states have return successors, (1171), 710 states have call predecessors, (1171), 707 states have call successors, (1171) [2022-12-14 11:34:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 5506 transitions. [2022-12-14 11:34:34,051 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 5506 transitions. Word has length 109 [2022-12-14 11:34:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:34,051 INFO L495 AbstractCegarLoop]: Abstraction has 3444 states and 5506 transitions. [2022-12-14 11:34:34,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 5506 transitions. [2022-12-14 11:34:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 11:34:34,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:34,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:34,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:34:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:34,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash -376486709, now seen corresponding path program 1 times [2022-12-14 11:34:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:34,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401265119] [2022-12-14 11:34:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:34:34,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:34,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401265119] [2022-12-14 11:34:34,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401265119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:34,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282788594] [2022-12-14 11:34:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:34,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:34,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:34,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:34,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:34:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:34,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:34:34,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:34:34,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:34,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282788594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:34,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:34,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-12-14 11:34:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595519998] [2022-12-14 11:34:34,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:34,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:34:34,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:34:34,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:34:34,646 INFO L87 Difference]: Start difference. First operand 3444 states and 5506 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:35,340 INFO L93 Difference]: Finished difference Result 7369 states and 12029 transitions. [2022-12-14 11:34:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:34:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 110 [2022-12-14 11:34:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:35,378 INFO L225 Difference]: With dead ends: 7369 [2022-12-14 11:34:35,378 INFO L226 Difference]: Without dead ends: 4370 [2022-12-14 11:34:35,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:35,389 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 704 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:35,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 2184 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:34:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2022-12-14 11:34:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 4237. [2022-12-14 11:34:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 3011 states have (on average 1.4613085353703088) internal successors, (4400), 3130 states have internal predecessors, (4400), 913 states have call successors, (913), 317 states have call predecessors, (913), 312 states have return successors, (1586), 898 states have call predecessors, (1586), 895 states have call successors, (1586) [2022-12-14 11:34:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 6899 transitions. [2022-12-14 11:34:35,542 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 6899 transitions. Word has length 110 [2022-12-14 11:34:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:35,542 INFO L495 AbstractCegarLoop]: Abstraction has 4237 states and 6899 transitions. [2022-12-14 11:34:35,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:34:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 6899 transitions. [2022-12-14 11:34:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 11:34:35,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:35,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:35,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:34:35,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:34:35,745 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash 797144889, now seen corresponding path program 1 times [2022-12-14 11:34:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:35,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523421119] [2022-12-14 11:34:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:34:35,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523421119] [2022-12-14 11:34:35,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523421119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:35,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134158669] [2022-12-14 11:34:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:35,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:35,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:35,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:34:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:34:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:34:36,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:34:36,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134158669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954254053] [2022-12-14 11:34:36,269 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-12-14 11:34:36,269 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:34:36,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:34:36,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:34:36,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:34:40,298 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 574 for LOIs [2022-12-14 11:34:49,631 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 449 for LOIs [2022-12-14 11:34:51,767 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 501 for LOIs [2022-12-14 11:34:53,834 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 503 for LOIs [2022-12-14 11:34:54,167 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 501 for LOIs [2022-12-14 11:34:54,485 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 458 for LOIs [2022-12-14 11:34:55,430 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 451 for LOIs [2022-12-14 11:34:55,505 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 439 for LOIs [2022-12-14 11:34:55,574 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 542 for LOIs [2022-12-14 11:34:57,984 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-12-14 11:35:05,792 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 641 for LOIs [2022-12-14 11:35:06,269 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:32,805 WARN L233 SmtUtils]: Spent 8.63s on a formula simplification. DAG size of input: 792 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:35:45,794 WARN L233 SmtUtils]: Spent 12.60s on a formula simplification. DAG size of input: 849 DAG size of output: 754 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:37:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1954254053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:37:38,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:37:38,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [5, 6, 7] total 64 [2022-12-14 11:37:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532592838] [2022-12-14 11:37:38,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:37:38,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 11:37:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 11:37:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3633, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 11:37:38,314 INFO L87 Difference]: Start difference. First operand 4237 states and 6899 transitions. Second operand has 52 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 33 states have internal predecessors, (62), 16 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-12-14 11:37:56,536 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 754 DAG size of output: 561 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:39:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:01,713 INFO L93 Difference]: Finished difference Result 8690 states and 14144 transitions. [2022-12-14 11:39:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 11:39:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 33 states have internal predecessors, (62), 16 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 111 [2022-12-14 11:39:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:01,730 INFO L225 Difference]: With dead ends: 8690 [2022-12-14 11:39:01,730 INFO L226 Difference]: Without dead ends: 4476 [2022-12-14 11:39:01,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 271 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 177.6s TimeCoverageRelationStatistics Valid=455, Invalid=4515, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 11:39:01,748 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 496 mSDsluCounter, 9188 mSDsCounter, 0 mSdLazyCounter, 14850 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 9841 SdHoareTripleChecker+Invalid, 14979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 14850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:01,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 9841 Invalid, 14979 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [129 Valid, 14850 Invalid, 0 Unknown, 0 Unchecked, 57.2s Time] [2022-12-14 11:39:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2022-12-14 11:39:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4400. [2022-12-14 11:39:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4400 states, 3123 states have (on average 1.4534101825168109) internal successors, (4539), 3245 states have internal predecessors, (4539), 947 states have call successors, (947), 332 states have call predecessors, (947), 329 states have return successors, (1622), 931 states have call predecessors, (1622), 929 states have call successors, (1622) [2022-12-14 11:39:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 7108 transitions. [2022-12-14 11:39:02,179 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 7108 transitions. Word has length 111 [2022-12-14 11:39:02,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:02,179 INFO L495 AbstractCegarLoop]: Abstraction has 4400 states and 7108 transitions. [2022-12-14 11:39:02,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 33 states have internal predecessors, (62), 16 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-12-14 11:39:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 7108 transitions. [2022-12-14 11:39:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 11:39:02,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:02,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:02,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:39:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 11:39:02,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash 159672693, now seen corresponding path program 1 times [2022-12-14 11:39:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:02,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150707587] [2022-12-14 11:39:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:02,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:39:02,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:02,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150707587] [2022-12-14 11:39:02,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150707587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:02,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:02,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:39:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102687390] [2022-12-14 11:39:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:02,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:39:02,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:39:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:39:02,696 INFO L87 Difference]: Start difference. First operand 4400 states and 7108 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-12-14 11:39:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:03,320 INFO L93 Difference]: Finished difference Result 8495 states and 13833 transitions. [2022-12-14 11:39:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:39:03,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-12-14 11:39:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:03,337 INFO L225 Difference]: With dead ends: 8495 [2022-12-14 11:39:03,337 INFO L226 Difference]: Without dead ends: 4479 [2022-12-14 11:39:03,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:39:03,354 INFO L413 NwaCegarLoop]: 900 mSDtfsCounter, 852 mSDsluCounter, 4816 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 5716 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:03,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 5716 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4479 states. [2022-12-14 11:39:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4479 to 4424. [2022-12-14 11:39:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 3139 states have (on average 1.4510990761388978) internal successors, (4555), 3263 states have internal predecessors, (4555), 947 states have call successors, (947), 332 states have call predecessors, (947), 337 states have return successors, (1639), 937 states have call predecessors, (1639), 929 states have call successors, (1639) [2022-12-14 11:39:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 7141 transitions. [2022-12-14 11:39:03,926 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 7141 transitions. Word has length 116 [2022-12-14 11:39:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:03,926 INFO L495 AbstractCegarLoop]: Abstraction has 4424 states and 7141 transitions. [2022-12-14 11:39:03,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-12-14 11:39:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 7141 transitions. [2022-12-14 11:39:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 11:39:03,932 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:03,932 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 11:39:03,932 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1227828152, now seen corresponding path program 1 times [2022-12-14 11:39:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:03,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829548452] [2022-12-14 11:39:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:39:04,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829548452] [2022-12-14 11:39:04,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829548452] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:04,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26905795] [2022-12-14 11:39:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:04,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:04,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:04,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:39:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:39:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:39:04,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:04,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26905795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:04,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:39:04,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-12-14 11:39:04,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025711092] [2022-12-14 11:39:04,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:39:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:39:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:39:04,339 INFO L87 Difference]: Start difference. First operand 4424 states and 7141 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:39:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:05,200 INFO L93 Difference]: Finished difference Result 9460 states and 16173 transitions. [2022-12-14 11:39:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:39:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 118 [2022-12-14 11:39:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:05,230 INFO L225 Difference]: With dead ends: 9460 [2022-12-14 11:39:05,230 INFO L226 Difference]: Without dead ends: 5445 [2022-12-14 11:39:05,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:39:05,246 INFO L413 NwaCegarLoop]: 754 mSDtfsCounter, 169 mSDsluCounter, 3565 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 4319 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:05,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 4319 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2022-12-14 11:39:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 5012. [2022-12-14 11:39:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 3466 states have (on average 1.4460473167916907) internal successors, (5012), 3657 states have internal predecessors, (5012), 1189 states have call successors, (1189), 332 states have call predecessors, (1189), 356 states have return successors, (2062), 1191 states have call predecessors, (2062), 1171 states have call successors, (2062) [2022-12-14 11:39:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8263 transitions. [2022-12-14 11:39:05,609 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8263 transitions. Word has length 118 [2022-12-14 11:39:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:05,609 INFO L495 AbstractCegarLoop]: Abstraction has 5012 states and 8263 transitions. [2022-12-14 11:39:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:39:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8263 transitions. [2022-12-14 11:39:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 11:39:05,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:05,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:05,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:39:05,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:39:05,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash -526457922, now seen corresponding path program 1 times [2022-12-14 11:39:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:05,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925646394] [2022-12-14 11:39:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:05,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:39:05,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925646394] [2022-12-14 11:39:05,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925646394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:05,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:05,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:39:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056077735] [2022-12-14 11:39:05,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:05,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:39:05,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:05,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:39:05,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:39:05,975 INFO L87 Difference]: Start difference. First operand 5012 states and 8263 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 11:39:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:06,794 INFO L93 Difference]: Finished difference Result 9602 states and 16894 transitions. [2022-12-14 11:39:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:39:06,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 120 [2022-12-14 11:39:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:06,823 INFO L225 Difference]: With dead ends: 9602 [2022-12-14 11:39:06,823 INFO L226 Difference]: Without dead ends: 5197 [2022-12-14 11:39:06,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:39:06,856 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 34 mSDsluCounter, 3972 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 4646 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:06,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 4646 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2022-12-14 11:39:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 5089. [2022-12-14 11:39:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5089 states, 3525 states have (on average 1.438581560283688) internal successors, (5071), 3715 states have internal predecessors, (5071), 1189 states have call successors, (1189), 332 states have call predecessors, (1189), 374 states have return successors, (2143), 1210 states have call predecessors, (2143), 1171 states have call successors, (2143) [2022-12-14 11:39:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 8403 transitions. [2022-12-14 11:39:07,310 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 8403 transitions. Word has length 120 [2022-12-14 11:39:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:07,310 INFO L495 AbstractCegarLoop]: Abstraction has 5089 states and 8403 transitions. [2022-12-14 11:39:07,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 11:39:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 8403 transitions. [2022-12-14 11:39:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 11:39:07,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:07,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:07,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 11:39:07,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash 503363937, now seen corresponding path program 1 times [2022-12-14 11:39:07,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:07,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765246909] [2022-12-14 11:39:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:07,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:39:07,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:07,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765246909] [2022-12-14 11:39:07,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765246909] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:07,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:07,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:39:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905652639] [2022-12-14 11:39:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:07,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:39:07,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:39:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:39:07,478 INFO L87 Difference]: Start difference. First operand 5089 states and 8403 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 11:39:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:08,089 INFO L93 Difference]: Finished difference Result 9720 states and 17090 transitions. [2022-12-14 11:39:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:39:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2022-12-14 11:39:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:08,108 INFO L225 Difference]: With dead ends: 9720 [2022-12-14 11:39:08,108 INFO L226 Difference]: Without dead ends: 5260 [2022-12-14 11:39:08,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:39:08,132 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 33 mSDsluCounter, 3994 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4673 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:08,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4673 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:39:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2022-12-14 11:39:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 5097. [2022-12-14 11:39:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5097 states, 3533 states have (on average 1.4375884517407302) internal successors, (5079), 3715 states have internal predecessors, (5079), 1189 states have call successors, (1189), 332 states have call predecessors, (1189), 374 states have return successors, (2143), 1218 states have call predecessors, (2143), 1171 states have call successors, (2143) [2022-12-14 11:39:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 8411 transitions. [2022-12-14 11:39:08,569 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 8411 transitions. Word has length 121 [2022-12-14 11:39:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:08,569 INFO L495 AbstractCegarLoop]: Abstraction has 5097 states and 8411 transitions. [2022-12-14 11:39:08,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 11:39:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 8411 transitions. [2022-12-14 11:39:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 11:39:08,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:08,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:08,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:39:08,577 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 215434785, now seen corresponding path program 1 times [2022-12-14 11:39:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:08,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752044862] [2022-12-14 11:39:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:39:08,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:08,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752044862] [2022-12-14 11:39:08,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752044862] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:08,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:08,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:39:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089317283] [2022-12-14 11:39:08,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:08,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:39:08,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:39:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:39:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:39:08,851 INFO L87 Difference]: Start difference. First operand 5097 states and 8411 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 11:39:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:09,529 INFO L93 Difference]: Finished difference Result 9730 states and 17100 transitions. [2022-12-14 11:39:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:39:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2022-12-14 11:39:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:09,546 INFO L225 Difference]: With dead ends: 9730 [2022-12-14 11:39:09,546 INFO L226 Difference]: Without dead ends: 5265 [2022-12-14 11:39:09,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:39:09,567 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 33 mSDsluCounter, 3994 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4673 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:09,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4673 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2022-12-14 11:39:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5102. [2022-12-14 11:39:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5102 states, 3538 states have (on average 1.4369700395703788) internal successors, (5084), 3712 states have internal predecessors, (5084), 1189 states have call successors, (1189), 332 states have call predecessors, (1189), 374 states have return successors, (2143), 1226 states have call predecessors, (2143), 1171 states have call successors, (2143) [2022-12-14 11:39:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 8416 transitions. [2022-12-14 11:39:09,958 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 8416 transitions. Word has length 121 [2022-12-14 11:39:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:09,958 INFO L495 AbstractCegarLoop]: Abstraction has 5102 states and 8416 transitions. [2022-12-14 11:39:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 11:39:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 8416 transitions. [2022-12-14 11:39:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 11:39:09,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:09,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 11:39:09,964 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:39:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 224523383, now seen corresponding path program 1 times [2022-12-14 11:39:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:39:09,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367430001] [2022-12-14 11:39:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:39:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 11:39:10,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:10,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367430001] [2022-12-14 11:39:10,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367430001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:10,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951511501] [2022-12-14 11:39:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:10,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:10,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:39:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:10,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:39:10,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:39:10,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:39:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951511501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:10,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931643897] [2022-12-14 11:39:10,556 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-12-14 11:39:10,557 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:39:10,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:39:10,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:39:10,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:39:14,472 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 574 for LOIs [2022-12-14 11:40:18,885 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 447 for LOIs [2022-12-14 11:40:20,896 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 499 for LOIs [2022-12-14 11:40:22,932 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 501 for LOIs [2022-12-14 11:40:23,261 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 456 for LOIs [2022-12-14 11:40:24,195 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 451 for LOIs [2022-12-14 11:40:24,270 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 439 for LOIs [2022-12-14 11:40:24,339 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 441 for LOIs [2022-12-14 11:40:24,485 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 441 for LOIs [2022-12-14 11:40:24,556 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 542 for LOIs [2022-12-14 11:40:26,908 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-12-14 11:40:36,849 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 641 for LOIs [2022-12-14 11:40:37,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:41:03,848 WARN L233 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 792 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:41:16,068 WARN L233 SmtUtils]: Spent 11.80s on a formula simplification. DAG size of input: 852 DAG size of output: 754 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:41:43,724 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:41:49,975 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 501 DAG size of output: 445 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:41:56,298 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 541 DAG size of output: 453 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:23,433 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 689 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:30,120 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 694 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:37,022 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 699 DAG size of output: 624 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:43,464 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 695 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:43:07,643 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 713 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:43:15,101 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 710 DAG size of output: 618 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:43:35,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1931643897] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:35,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:43:35,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [5, 6, 7] total 66 [2022-12-14 11:43:35,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965698361] [2022-12-14 11:43:35,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:35,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 11:43:35,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:43:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 11:43:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=3857, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 11:43:35,499 INFO L87 Difference]: Start difference. First operand 5102 states and 8416 transitions. Second operand has 54 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 33 states have internal predecessors, (67), 16 states have call successors, (21), 13 states have call predecessors, (21), 11 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-14 11:43:55,573 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification. DAG size of input: 754 DAG size of output: 561 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:44:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:50,323 INFO L93 Difference]: Finished difference Result 10218 states and 16882 transitions. [2022-12-14 11:44:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 11:44:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 33 states have internal predecessors, (67), 16 states have call successors, (21), 13 states have call predecessors, (21), 11 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) Word has length 120 [2022-12-14 11:44:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:50,341 INFO L225 Difference]: With dead ends: 10218 [2022-12-14 11:44:50,341 INFO L226 Difference]: Without dead ends: 5213 [2022-12-14 11:44:50,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 296 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 218.6s TimeCoverageRelationStatistics Valid=529, Invalid=5323, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 11:44:50,359 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 451 mSDsluCounter, 7301 mSDsCounter, 0 mSdLazyCounter, 9003 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 7941 SdHoareTripleChecker+Invalid, 9111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 9003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:50,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 7941 Invalid, 9111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [108 Valid, 9003 Invalid, 0 Unknown, 0 Unchecked, 33.7s Time] [2022-12-14 11:44:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2022-12-14 11:44:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 5129. [2022-12-14 11:44:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 3552 states have (on average 1.4358108108108107) internal successors, (5100), 3730 states have internal predecessors, (5100), 1196 states have call successors, (1196), 339 states have call predecessors, (1196), 380 states have return successors, (2149), 1228 states have call predecessors, (2149), 1178 states have call successors, (2149) [2022-12-14 11:44:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 8445 transitions. [2022-12-14 11:44:50,756 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 8445 transitions. Word has length 120 [2022-12-14 11:44:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:50,756 INFO L495 AbstractCegarLoop]: Abstraction has 5129 states and 8445 transitions. [2022-12-14 11:44:50,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 33 states have internal predecessors, (67), 16 states have call successors, (21), 13 states have call predecessors, (21), 11 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2022-12-14 11:44:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 8445 transitions. [2022-12-14 11:44:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 11:44:50,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:50,759 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:50,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:44:50,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:44:50,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:44:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -662944545, now seen corresponding path program 1 times [2022-12-14 11:44:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:44:50,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584196641] [2022-12-14 11:44:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:44:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:44:51,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:44:51,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584196641] [2022-12-14 11:44:51,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584196641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:44:51,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056579952] [2022-12-14 11:44:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:51,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:51,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:51,096 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:51,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211be5c5-a569-4fe0-abdc-ac70f8d64b92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:44:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:44:51,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 11:44:51,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:44:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:44:51,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056579952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:44:51,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660664785] [2022-12-14 11:44:51,429 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2022-12-14 11:44:51,429 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:44:51,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:44:51,429 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:44:51,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:44:55,120 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 574 for LOIs [2022-12-14 11:45:28,828 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 447 for LOIs [2022-12-14 11:45:30,821 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 499 for LOIs [2022-12-14 11:45:32,829 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 441 for LOIs [2022-12-14 11:45:32,900 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 82 for LOIs [2022-12-14 11:45:32,984 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 77 for LOIs [2022-12-14 11:45:32,989 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 439 for LOIs [2022-12-14 11:45:33,059 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 441 for LOIs [2022-12-14 11:45:34,794 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 113 for LOIs [2022-12-14 11:45:34,822 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 459 for LOIs [2022-12-14 11:45:34,929 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 542 for LOIs [2022-12-14 11:45:37,312 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-12-14 11:46:34,128 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 641 for LOIs [2022-12-14 11:46:34,604 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:00,363 WARN L233 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 792 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:47:12,546 WARN L233 SmtUtils]: Spent 11.00s on a formula simplification. DAG size of input: 948 DAG size of output: 721 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)