./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.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_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/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_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/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_9d433ff6-51ea-493f-8c84-a246f6dd1036/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 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 --- 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 09:40:23,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:40:23,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:40:23,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:40:23,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:40:23,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:40:23,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:40:23,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:40:23,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:40:23,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:40:23,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:40:23,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:40:23,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:40:23,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:40:23,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:40:23,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:40:23,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:40:23,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:40:23,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:40:23,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:40:23,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:40:23,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:40:23,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:40:23,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:40:23,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:40:23,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:40:23,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:40:23,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:40:23,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:40:23,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:40:23,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:40:23,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:40:23,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:40:23,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:40:23,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:40:23,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:40:23,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:40:23,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:40:23,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:40:23,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:40:23,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:40:23,844 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:40:23,863 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:40:23,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:40:23,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:40:23,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:40:23,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:40:23,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:40:23,865 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:40:23,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:40:23,865 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:40:23,870 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:40:23,871 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:40:23,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:40:23,871 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:40:23,871 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:40:23,872 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:40:23,872 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:40:23,872 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:40:23,872 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:40:23,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:40:23,873 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:40:23,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:40:23,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:40:23,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:40:23,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:40:23,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:40:23,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:40:23,874 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:40:23,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:40:23,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:40:23,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:40:23,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:40:23,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:40:23,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:40:23,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:40:23,875 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:40:23,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:40:23,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:40:23,876 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:40:23,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:40:23,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:40:23,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:40:23,877 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_9d433ff6-51ea-493f-8c84-a246f6dd1036/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 [2022-12-14 09:40:24,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:40:24,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:40:24,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:40:24,088 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:40:24,089 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:40:24,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2022-12-14 09:40:26,616 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:40:26,852 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:40:26,853 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2022-12-14 09:40:26,863 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/data/d3e32d4db/2c7c7d8abab74991926cdb4800f2fcb9/FLAG57637d7db [2022-12-14 09:40:27,173 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/data/d3e32d4db/2c7c7d8abab74991926cdb4800f2fcb9 [2022-12-14 09:40:27,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:40:27,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:40:27,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:40:27,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:40:27,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:40:27,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5c6afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27, skipping insertion in model container [2022-12-14 09:40:27,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:40:27,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:40:27,484 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_9d433ff6-51ea-493f-8c84-a246f6dd1036/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2022-12-14 09:40:27,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:40:27,523 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:40:27,573 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_9d433ff6-51ea-493f-8c84-a246f6dd1036/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2022-12-14 09:40:27,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:40:27,602 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:40:27,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27 WrapperNode [2022-12-14 09:40:27,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:40:27,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:40:27,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:40:27,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:40:27,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,658 INFO L138 Inliner]: procedures = 91, calls = 333, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1051 [2022-12-14 09:40:27,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:40:27,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:40:27,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:40:27,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:40:27,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:40:27,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:40:27,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:40:27,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:40:27,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (1/1) ... [2022-12-14 09:40:27,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:40:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:40:27,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:40:27,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:40:27,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:40:27,764 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 09:40:27,764 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 09:40:27,764 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 09:40:27,764 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 09:40:27,764 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 09:40:27,764 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 09:40:27,764 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 09:40:27,764 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 09:40:27,764 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 09:40:27,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 09:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 09:40:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 09:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 09:40:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 09:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 09:40:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 09:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 09:40:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 09:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 09:40:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 09:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 09:40:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 09:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 09:40:27,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 09:40:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 09:40:27,766 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 09:40:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 09:40:27,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 09:40:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 09:40:27,766 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 09:40:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 09:40:27,767 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 09:40:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 09:40:27,767 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 09:40:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 09:40:27,767 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 09:40:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 09:40:27,767 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 09:40:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:40:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 09:40:27,768 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 09:40:27,768 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 09:40:27,768 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 09:40:27,768 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 09:40:27,768 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 09:40:27,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:40:27,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:40:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 09:40:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 09:40:27,900 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:40:27,902 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:40:28,629 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:40:29,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:40:29,111 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:40:29,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:40:29 BoogieIcfgContainer [2022-12-14 09:40:29,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:40:29,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:40:29,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:40:29,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:40:29,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:40:27" (1/3) ... [2022-12-14 09:40:29,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67344b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:40:29, skipping insertion in model container [2022-12-14 09:40:29,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:40:27" (2/3) ... [2022-12-14 09:40:29,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67344b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:40:29, skipping insertion in model container [2022-12-14 09:40:29,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:40:29" (3/3) ... [2022-12-14 09:40:29,120 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2022-12-14 09:40:29,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:40:29,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:40:29,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:40:29,179 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;@3ece78a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:40:29,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:40:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-12-14 09:40:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:40:29,196 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:29,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:29,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash -33809074, now seen corresponding path program 1 times [2022-12-14 09:40:29,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:29,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551311063] [2022-12-14 09:40:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:29,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:40:29,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551311063] [2022-12-14 09:40:29,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551311063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:40:29,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:40:29,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:40:29,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479755548] [2022-12-14 09:40:29,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:29,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:40:29,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:40:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:40:29,650 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 09:40:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:40:30,255 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2022-12-14 09:40:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:40:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-12-14 09:40:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:40:30,277 INFO L225 Difference]: With dead ends: 1037 [2022-12-14 09:40:30,277 INFO L226 Difference]: Without dead ends: 685 [2022-12-14 09:40:30,286 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 09:40:30,289 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:40:30,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:40:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-12-14 09:40:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2022-12-14 09:40:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2022-12-14 09:40:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2022-12-14 09:40:30,378 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2022-12-14 09:40:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:40:30,379 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2022-12-14 09:40:30,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 09:40:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2022-12-14 09:40:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 09:40:30,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:30,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:30,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:40:30,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 421679254, now seen corresponding path program 1 times [2022-12-14 09:40:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263741418] [2022-12-14 09:40:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:40:32,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263741418] [2022-12-14 09:40:32,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263741418] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:40:32,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832165959] [2022-12-14 09:40:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:32,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:40:32,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:40:32,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:40:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:40:32,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:40:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 09:40:32,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:40:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:40:32,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832165959] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:40:32,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:40:32,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 4] total 22 [2022-12-14 09:40:32,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255930302] [2022-12-14 09:40:32,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:32,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:40:32,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:40:32,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:40:32,840 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 09:40:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:40:33,280 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2022-12-14 09:40:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:40:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-12-14 09:40:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:40:33,287 INFO L225 Difference]: With dead ends: 776 [2022-12-14 09:40:33,287 INFO L226 Difference]: Without dead ends: 774 [2022-12-14 09:40:33,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:40:33,289 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 637 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:40:33,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1299 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:40:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-12-14 09:40:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2022-12-14 09:40:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-12-14 09:40:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2022-12-14 09:40:33,360 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2022-12-14 09:40:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:40:33,360 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2022-12-14 09:40:33,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 09:40:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2022-12-14 09:40:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 09:40:33,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:33,366 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:40:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 09:40:33,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -43358496, now seen corresponding path program 1 times [2022-12-14 09:40:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:33,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935725853] [2022-12-14 09:40:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 09:40:33,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:33,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935725853] [2022-12-14 09:40:33,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935725853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:40:33,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:40:33,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:40:33,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76381121] [2022-12-14 09:40:33,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:33,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:40:33,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:33,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:40:33,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:40:33,732 INFO L87 Difference]: Start difference. First operand 764 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 09:40:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:40:33,885 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2022-12-14 09:40:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:40:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-12-14 09:40:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:40:33,889 INFO L225 Difference]: With dead ends: 1554 [2022-12-14 09:40:33,890 INFO L226 Difference]: Without dead ends: 802 [2022-12-14 09:40:33,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:40:33,894 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 54 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:40:33,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:40:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-12-14 09:40:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2022-12-14 09:40:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-12-14 09:40:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2022-12-14 09:40:33,932 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2022-12-14 09:40:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:40:33,932 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2022-12-14 09:40:33,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 09:40:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2022-12-14 09:40:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 09:40:33,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:33,935 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:40:33,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1195525684, now seen corresponding path program 1 times [2022-12-14 09:40:33,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:33,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886896934] [2022-12-14 09:40:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 09:40:34,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:34,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886896934] [2022-12-14 09:40:34,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886896934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:40:34,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305754295] [2022-12-14 09:40:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:40:34,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:40:34,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:40:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:40:34,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:40:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 09:40:34,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:40:34,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305754295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:40:34,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:40:34,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 09:40:34,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440314118] [2022-12-14 09:40:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:34,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:40:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:40:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:40:34,277 INFO L87 Difference]: Start difference. First operand 768 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:40:34,519 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2022-12-14 09:40:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:40:34,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-12-14 09:40:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:40:34,525 INFO L225 Difference]: With dead ends: 1602 [2022-12-14 09:40:34,525 INFO L226 Difference]: Without dead ends: 846 [2022-12-14 09:40:34,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:40:34,532 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:40:34,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:40:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-12-14 09:40:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-12-14 09:40:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-12-14 09:40:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2022-12-14 09:40:34,585 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2022-12-14 09:40:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:40:34,586 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2022-12-14 09:40:34,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2022-12-14 09:40:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 09:40:34,590 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:34,590 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:34,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:40:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:34,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1752765979, now seen corresponding path program 1 times [2022-12-14 09:40:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057659356] [2022-12-14 09:40:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:34,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 09:40:34,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057659356] [2022-12-14 09:40:34,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057659356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:40:34,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973560216] [2022-12-14 09:40:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:34,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:34,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:40:34,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:40:34,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:40:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:40:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:40:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 09:40:35,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:40:35,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973560216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:40:35,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:40:35,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 09:40:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083743047] [2022-12-14 09:40:35,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:35,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:40:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:40:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:40:35,180 INFO L87 Difference]: Start difference. First operand 846 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:40:35,403 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2022-12-14 09:40:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:40:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-12-14 09:40:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:40:35,407 INFO L225 Difference]: With dead ends: 1758 [2022-12-14 09:40:35,407 INFO L226 Difference]: Without dead ends: 924 [2022-12-14 09:40:35,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:40:35,411 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:40:35,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:40:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-12-14 09:40:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-12-14 09:40:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-12-14 09:40:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2022-12-14 09:40:35,441 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2022-12-14 09:40:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:40:35,442 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2022-12-14 09:40:35,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2022-12-14 09:40:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 09:40:35,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:35,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:35,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:40:35,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:35,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash -47759861, now seen corresponding path program 1 times [2022-12-14 09:40:35,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:35,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715332221] [2022-12-14 09:40:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 09:40:35,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715332221] [2022-12-14 09:40:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715332221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:40:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692496499] [2022-12-14 09:40:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:40:35,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:40:35,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:40:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:35,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:40:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:40:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 09:40:36,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:40:36,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692496499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:40:36,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:40:36,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 09:40:36,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731001407] [2022-12-14 09:40:36,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:36,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:40:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:36,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:40:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:40:36,012 INFO L87 Difference]: Start difference. First operand 924 states and 1485 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:40:36,252 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2022-12-14 09:40:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:40:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-12-14 09:40:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:40:36,256 INFO L225 Difference]: With dead ends: 1914 [2022-12-14 09:40:36,256 INFO L226 Difference]: Without dead ends: 1002 [2022-12-14 09:40:36,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:40:36,260 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:40:36,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:40:36,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-12-14 09:40:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-12-14 09:40:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-12-14 09:40:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2022-12-14 09:40:36,290 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2022-12-14 09:40:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:40:36,290 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2022-12-14 09:40:36,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2022-12-14 09:40:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 09:40:36,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:36,293 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:36,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:40:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:36,494 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:36,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1679185812, now seen corresponding path program 1 times [2022-12-14 09:40:36,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:36,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973796010] [2022-12-14 09:40:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 09:40:36,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:36,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973796010] [2022-12-14 09:40:36,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973796010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:40:36,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613845475] [2022-12-14 09:40:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:40:36,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:40:36,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:40:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:40:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:40:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:40:36,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:40:36,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613845475] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:40:36,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:40:36,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 09:40:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049034865] [2022-12-14 09:40:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:40:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:40:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:40:36,826 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:40:37,043 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2022-12-14 09:40:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:40:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-12-14 09:40:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:40:37,050 INFO L225 Difference]: With dead ends: 2070 [2022-12-14 09:40:37,050 INFO L226 Difference]: Without dead ends: 1080 [2022-12-14 09:40:37,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:40:37,056 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:40:37,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:40:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-12-14 09:40:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-12-14 09:40:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-12-14 09:40:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2022-12-14 09:40:37,090 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2022-12-14 09:40:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:40:37,091 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2022-12-14 09:40:37,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 09:40:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2022-12-14 09:40:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 09:40:37,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:40:37,096 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:40:37,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:40:37,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:37,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:40:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:40:37,297 INFO L85 PathProgramCache]: Analyzing trace with hash -30498886, now seen corresponding path program 1 times [2022-12-14 09:40:37,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:40:37,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538508055] [2022-12-14 09:40:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:40:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 09:40:37,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:37,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538508055] [2022-12-14 09:40:37,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538508055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:40:37,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642390973] [2022-12-14 09:40:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:40:37,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:40:37,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:40:37,449 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:40:37,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:40:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:40:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 09:40:37,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:40:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 09:40:38,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:41:07,066 WARN L233 SmtUtils]: Spent 26.85s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 09:41:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 09:41:08,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642390973] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:41:08,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419483977] [2022-12-14 09:41:08,755 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-12-14 09:41:08,755 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:41:08,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:41:08,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:41:08,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:41:10,677 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 09:41:13,865 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 09:41:14,425 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-12-14 09:41:33,874 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2022-12-14 09:41:33,878 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-12-14 09:41:33,919 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2022-12-14 09:41:34,468 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 09:41:34,607 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 437 for LOIs [2022-12-14 09:41:35,323 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 499 for LOIs [2022-12-14 09:41:35,511 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 84 for LOIs [2022-12-14 09:41:35,527 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:42:54,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26162#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |timeShift_processWaitingOnFloor_~tmp___2~2#1| 0) (= |old(~persons_1~0)| 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (<= ~personOnFloor_5_1~0 1) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= |timeShift_processWaitingOnFloor_~tmp___0~5#1| 0) (<= ~calls_0~0 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 ~floorButtons_3~0) (<= 0 |timeShift_~tmp___9~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (<= 1 ~currentHeading~0) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= 1 ~personOnFloor_5_1~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (= |old(~currentHeading~0)| 1) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 0) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (<= |timeShift_resetFloorButton_~floorID#1| 0) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 ~floorButtons_4~0) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 ~weight~0) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-12-14 09:42:54,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:42:54,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:42:54,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2022-12-14 09:42:54,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101807065] [2022-12-14 09:42:54,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:42:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 09:42:54,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:42:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 09:42:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=7027, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 09:42:54,503 INFO L87 Difference]: Start difference. First operand 1080 states and 1777 transitions. Second operand has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 09:43:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:43:03,931 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2022-12-14 09:43:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 09:43:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) Word has length 125 [2022-12-14 09:43:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:43:03,938 INFO L225 Difference]: With dead ends: 3455 [2022-12-14 09:43:03,938 INFO L226 Difference]: Without dead ends: 1904 [2022-12-14 09:43:03,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 290 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7668 ImplicationChecksByTransitivity, 81.5s TimeCoverageRelationStatistics Valid=1859, Invalid=17881, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 09:43:03,947 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 5281 mSDsluCounter, 3377 mSDsCounter, 0 mSdLazyCounter, 14337 mSolverCounterSat, 3201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5326 SdHoareTripleChecker+Valid, 3696 SdHoareTripleChecker+Invalid, 17538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3201 IncrementalHoareTripleChecker+Valid, 14337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:43:03,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5326 Valid, 3696 Invalid, 17538 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3201 Valid, 14337 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 09:43:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-12-14 09:43:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2022-12-14 09:43:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1262 states have (on average 1.5736925515055467) internal successors, (1986), 1324 states have internal predecessors, (1986), 372 states have call successors, (372), 132 states have call predecessors, (372), 126 states have return successors, (414), 352 states have call predecessors, (414), 369 states have call successors, (414) [2022-12-14 09:43:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2022-12-14 09:43:04,035 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2022-12-14 09:43:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:43:04,035 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2022-12-14 09:43:04,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-12-14 09:43:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2022-12-14 09:43:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 09:43:04,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:43:04,039 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:43:04,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:43:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 09:43:04,240 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:43:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:43:04,241 INFO L85 PathProgramCache]: Analyzing trace with hash -348899022, now seen corresponding path program 1 times [2022-12-14 09:43:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:43:04,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136835594] [2022-12-14 09:43:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:04,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:43:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 09:43:04,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:43:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136835594] [2022-12-14 09:43:04,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136835594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:43:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789049322] [2022-12-14 09:43:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:04,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:43:04,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:43:04,404 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:43:04,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:43:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:04,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:43:04,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:43:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 09:43:04,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:43:04,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789049322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:43:04,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:43:04,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 09:43:04,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853917449] [2022-12-14 09:43:04,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:43:04,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:43:04,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:43:04,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:43:04,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:43:04,709 INFO L87 Difference]: Start difference. First operand 1761 states and 2772 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 09:43:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:43:05,268 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2022-12-14 09:43:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:43:05,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2022-12-14 09:43:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:43:05,273 INFO L225 Difference]: With dead ends: 3327 [2022-12-14 09:43:05,273 INFO L226 Difference]: Without dead ends: 1579 [2022-12-14 09:43:05,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:43:05,277 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 340 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:43:05,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1986 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:43:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-12-14 09:43:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2022-12-14 09:43:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1134 states have (on average 1.5864197530864197) internal successors, (1799), 1180 states have internal predecessors, (1799), 309 states have call successors, (309), 116 states have call predecessors, (309), 111 states have return successors, (338), 294 states have call predecessors, (338), 306 states have call successors, (338) [2022-12-14 09:43:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2022-12-14 09:43:05,347 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2022-12-14 09:43:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:43:05,347 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2022-12-14 09:43:05,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 09:43:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2022-12-14 09:43:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-14 09:43:05,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:43:05,353 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:43:05,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:43:05,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 09:43:05,554 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:43:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:43:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1923405758, now seen corresponding path program 1 times [2022-12-14 09:43:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:43:05,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430019625] [2022-12-14 09:43:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:43:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 09:43:06,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:43:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430019625] [2022-12-14 09:43:06,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430019625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:43:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235627887] [2022-12-14 09:43:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:43:06,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:43:06,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:43:06,018 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:43:06,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:43:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:43:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:43:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:43:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 93 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-12-14 09:43:06,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:43:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-12-14 09:43:06,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235627887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:43:06,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867757686] [2022-12-14 09:43:06,758 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2022-12-14 09:43:06,758 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:43:06,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:43:06,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:43:06,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:43:11,441 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 09:43:18,811 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-12-14 09:43:19,061 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-12-14 09:43:19,079 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-12-14 09:43:19,204 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-12-14 09:43:19,258 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-12-14 09:43:19,270 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-12-14 09:43:19,281 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-12-14 09:43:19,283 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 09:43:22,468 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 09:43:23,020 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 09:43:23,080 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-12-14 09:43:23,082 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 09:43:23,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:44:15,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41708#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 09:44:15,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:44:15,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:44:15,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 30 [2022-12-14 09:44:15,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600323833] [2022-12-14 09:44:15,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:44:15,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 09:44:15,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:44:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 09:44:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=11492, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 09:44:15,106 INFO L87 Difference]: Start difference. First operand 1555 states and 2446 transitions. Second operand has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2022-12-14 09:44:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:44:26,240 INFO L93 Difference]: Finished difference Result 5077 states and 8200 transitions. [2022-12-14 09:44:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 09:44:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) Word has length 242 [2022-12-14 09:44:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:44:26,268 INFO L225 Difference]: With dead ends: 5077 [2022-12-14 09:44:26,268 INFO L226 Difference]: Without dead ends: 3721 [2022-12-14 09:44:26,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 654 SyntacticMatches, 11 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11062 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=2311, Invalid=26759, Unknown=0, NotChecked=0, Total=29070 [2022-12-14 09:44:26,279 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 8894 mSDsluCounter, 4896 mSDsCounter, 0 mSdLazyCounter, 21880 mSolverCounterSat, 6343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8906 SdHoareTripleChecker+Valid, 5344 SdHoareTripleChecker+Invalid, 28223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6343 IncrementalHoareTripleChecker+Valid, 21880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:44:26,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8906 Valid, 5344 Invalid, 28223 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6343 Valid, 21880 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-12-14 09:44:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-12-14 09:44:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3444. [2022-12-14 09:44:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 2505 states have (on average 1.5497005988023953) internal successors, (3882), 2598 states have internal predecessors, (3882), 663 states have call successors, (663), 284 states have call predecessors, (663), 275 states have return successors, (780), 633 states have call predecessors, (780), 655 states have call successors, (780) [2022-12-14 09:44:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 5325 transitions. [2022-12-14 09:44:26,450 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 5325 transitions. Word has length 242 [2022-12-14 09:44:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:44:26,451 INFO L495 AbstractCegarLoop]: Abstraction has 3444 states and 5325 transitions. [2022-12-14 09:44:26,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2022-12-14 09:44:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 5325 transitions. [2022-12-14 09:44:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-14 09:44:26,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:44:26,461 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:44:26,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:44:26,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:44:26,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:44:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:44:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1276201513, now seen corresponding path program 1 times [2022-12-14 09:44:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:44:26,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665490311] [2022-12-14 09:44:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:44:26,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:44:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:44:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-12-14 09:44:27,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:44:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665490311] [2022-12-14 09:44:27,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665490311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:44:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640319356] [2022-12-14 09:44:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:44:27,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:44:27,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:44:27,066 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:44:27,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:44:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:44:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:44:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:44:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 67 proven. 10 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 09:44:27,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:44:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-14 09:44:27,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640319356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:44:27,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333553101] [2022-12-14 09:44:27,670 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-12-14 09:44:27,670 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:44:27,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:44:27,671 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:44:27,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:44:31,217 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 09:44:38,385 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-12-14 09:44:38,651 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-12-14 09:44:38,667 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-12-14 09:44:38,797 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-12-14 09:44:38,847 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-12-14 09:44:38,859 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-12-14 09:44:38,871 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-12-14 09:44:38,872 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 09:44:42,027 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 09:44:42,582 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 09:44:42,611 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-12-14 09:44:42,613 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 09:44:42,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:34,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54600#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:34,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:34,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:45:34,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-14 09:45:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934623105] [2022-12-14 09:45:34,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:34,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:45:34,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:45:34,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=10492, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 09:45:34,760 INFO L87 Difference]: Start difference. First operand 3444 states and 5325 transitions. Second operand has 25 states, 19 states have (on average 10.578947368421053) internal successors, (201), 21 states have internal predecessors, (201), 13 states have call successors, (66), 7 states have call predecessors, (66), 9 states have return successors, (64), 14 states have call predecessors, (64), 12 states have call successors, (64) [2022-12-14 09:45:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:46,466 INFO L93 Difference]: Finished difference Result 9635 states and 15053 transitions. [2022-12-14 09:45:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 09:45:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.578947368421053) internal successors, (201), 21 states have internal predecessors, (201), 13 states have call successors, (66), 7 states have call predecessors, (66), 9 states have return successors, (64), 14 states have call predecessors, (64), 12 states have call successors, (64) Word has length 192 [2022-12-14 09:45:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:46,484 INFO L225 Difference]: With dead ends: 9635 [2022-12-14 09:45:46,484 INFO L226 Difference]: Without dead ends: 5236 [2022-12-14 09:45:46,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 502 SyntacticMatches, 18 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11937 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=2272, Invalid=25784, Unknown=0, NotChecked=0, Total=28056 [2022-12-14 09:45:46,503 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 6186 mSDsluCounter, 5763 mSDsCounter, 0 mSdLazyCounter, 22983 mSolverCounterSat, 4672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6206 SdHoareTripleChecker+Valid, 6308 SdHoareTripleChecker+Invalid, 27655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4672 IncrementalHoareTripleChecker+Valid, 22983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:46,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6206 Valid, 6308 Invalid, 27655 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4672 Valid, 22983 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-12-14 09:45:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2022-12-14 09:45:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 4837. [2022-12-14 09:45:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 3498 states have (on average 1.4734133790737565) internal successors, (5154), 3584 states have internal predecessors, (5154), 907 states have call successors, (907), 440 states have call predecessors, (907), 431 states have return successors, (1103), 872 states have call predecessors, (1103), 896 states have call successors, (1103) [2022-12-14 09:45:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 7164 transitions. [2022-12-14 09:45:46,804 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 7164 transitions. Word has length 192 [2022-12-14 09:45:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:46,805 INFO L495 AbstractCegarLoop]: Abstraction has 4837 states and 7164 transitions. [2022-12-14 09:45:46,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.578947368421053) internal successors, (201), 21 states have internal predecessors, (201), 13 states have call successors, (66), 7 states have call predecessors, (66), 9 states have return successors, (64), 14 states have call predecessors, (64), 12 states have call successors, (64) [2022-12-14 09:45:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 7164 transitions. [2022-12-14 09:45:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-12-14 09:45:46,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:46,826 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:46,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 09:45:47,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:47,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash 489452670, now seen corresponding path program 1 times [2022-12-14 09:45:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164936663] [2022-12-14 09:45:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-12-14 09:45:47,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:47,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164936663] [2022-12-14 09:45:47,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164936663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:45:47,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:45:47,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:45:47,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689972852] [2022-12-14 09:45:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:45:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:45:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:45:47,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:45:47,124 INFO L87 Difference]: Start difference. First operand 4837 states and 7164 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 09:45:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:47,527 INFO L93 Difference]: Finished difference Result 8545 states and 12691 transitions. [2022-12-14 09:45:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:45:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 258 [2022-12-14 09:45:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:47,543 INFO L225 Difference]: With dead ends: 8545 [2022-12-14 09:45:47,543 INFO L226 Difference]: Without dead ends: 4895 [2022-12-14 09:45:47,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:45:47,554 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 352 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:47,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1005 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4895 states. [2022-12-14 09:45:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4895 to 4873. [2022-12-14 09:45:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 3521 states have (on average 1.4478841238284579) internal successors, (5098), 3607 states have internal predecessors, (5098), 914 states have call successors, (914), 446 states have call predecessors, (914), 437 states have return successors, (1097), 879 states have call predecessors, (1097), 903 states have call successors, (1097) [2022-12-14 09:45:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7109 transitions. [2022-12-14 09:45:47,807 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7109 transitions. Word has length 258 [2022-12-14 09:45:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:47,808 INFO L495 AbstractCegarLoop]: Abstraction has 4873 states and 7109 transitions. [2022-12-14 09:45:47,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 09:45:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7109 transitions. [2022-12-14 09:45:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-12-14 09:45:47,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:47,825 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:47,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 09:45:47,826 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash -477033860, now seen corresponding path program 1 times [2022-12-14 09:45:47,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:47,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451252055] [2022-12-14 09:45:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:47,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-12-14 09:45:48,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451252055] [2022-12-14 09:45:48,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451252055] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:45:48,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:45:48,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:45:48,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44383547] [2022-12-14 09:45:48,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:45:48,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:45:48,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:45:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:45:48,057 INFO L87 Difference]: Start difference. First operand 4873 states and 7109 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 09:45:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:48,423 INFO L93 Difference]: Finished difference Result 9601 states and 14073 transitions. [2022-12-14 09:45:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:45:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 316 [2022-12-14 09:45:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:48,441 INFO L225 Difference]: With dead ends: 9601 [2022-12-14 09:45:48,441 INFO L226 Difference]: Without dead ends: 5097 [2022-12-14 09:45:48,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:45:48,455 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 17 mSDsluCounter, 2051 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:48,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2575 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2022-12-14 09:45:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 5011. [2022-12-14 09:45:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5011 states, 3621 states have (on average 1.4349627174813588) internal successors, (5196), 3732 states have internal predecessors, (5196), 912 states have call successors, (912), 446 states have call predecessors, (912), 477 states have return successors, (1148), 892 states have call predecessors, (1148), 901 states have call successors, (1148) [2022-12-14 09:45:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5011 states to 5011 states and 7256 transitions. [2022-12-14 09:45:48,738 INFO L78 Accepts]: Start accepts. Automaton has 5011 states and 7256 transitions. Word has length 316 [2022-12-14 09:45:48,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:48,738 INFO L495 AbstractCegarLoop]: Abstraction has 5011 states and 7256 transitions. [2022-12-14 09:45:48,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 09:45:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5011 states and 7256 transitions. [2022-12-14 09:45:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-12-14 09:45:48,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:48,754 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 09:45:48,755 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:48,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1543855544, now seen corresponding path program 1 times [2022-12-14 09:45:48,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:48,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948042768] [2022-12-14 09:45:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:48,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-12-14 09:45:48,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:48,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948042768] [2022-12-14 09:45:48,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948042768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:45:48,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:45:48,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:45:48,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897801623] [2022-12-14 09:45:48,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:45:48,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:45:48,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:45:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:45:48,910 INFO L87 Difference]: Start difference. First operand 5011 states and 7256 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 09:45:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:49,436 INFO L93 Difference]: Finished difference Result 10581 states and 15742 transitions. [2022-12-14 09:45:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:45:49,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 260 [2022-12-14 09:45:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:49,453 INFO L225 Difference]: With dead ends: 10581 [2022-12-14 09:45:49,453 INFO L226 Difference]: Without dead ends: 5079 [2022-12-14 09:45:49,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:45:49,470 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 427 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:49,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 1702 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2022-12-14 09:45:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 5015. [2022-12-14 09:45:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5015 states, 3623 states have (on average 1.3966326248964946) internal successors, (5060), 3736 states have internal predecessors, (5060), 912 states have call successors, (912), 446 states have call predecessors, (912), 479 states have return successors, (1152), 892 states have call predecessors, (1152), 901 states have call successors, (1152) [2022-12-14 09:45:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5015 states to 5015 states and 7124 transitions. [2022-12-14 09:45:49,753 INFO L78 Accepts]: Start accepts. Automaton has 5015 states and 7124 transitions. Word has length 260 [2022-12-14 09:45:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:49,754 INFO L495 AbstractCegarLoop]: Abstraction has 5015 states and 7124 transitions. [2022-12-14 09:45:49,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 09:45:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5015 states and 7124 transitions. [2022-12-14 09:45:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-12-14 09:45:49,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:49,766 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:49,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 09:45:49,767 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1894063373, now seen corresponding path program 1 times [2022-12-14 09:45:49,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:49,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550015035] [2022-12-14 09:45:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-12-14 09:45:50,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550015035] [2022-12-14 09:45:50,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550015035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:45:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910850284] [2022-12-14 09:45:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:50,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:50,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:50,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:50,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:45:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:45:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 101 proven. 18 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-12-14 09:45:50,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-12-14 09:45:50,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910850284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:50,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618295667] [2022-12-14 09:45:50,624 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-12-14 09:45:50,624 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:50,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:50,624 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:50,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:55,185 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 09:46:02,542 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-12-14 09:46:02,781 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 21 for LOIs [2022-12-14 09:46:02,797 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 84 for LOIs [2022-12-14 09:46:02,936 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-12-14 09:46:02,988 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2022-12-14 09:46:03,000 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-12-14 09:46:03,011 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 21 for LOIs [2022-12-14 09:46:03,013 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 09:46:06,209 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 09:46:06,754 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 09:46:06,796 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-12-14 09:46:06,798 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 09:46:06,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:03,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137464#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 09:47:03,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:47:03,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:47:03,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-14 09:47:03,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631746728] [2022-12-14 09:47:03,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:47:03,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:47:03,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:03,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:47:03,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=10409, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 09:47:03,031 INFO L87 Difference]: Start difference. First operand 5015 states and 7124 transitions. Second operand has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-12-14 09:47:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:07,842 INFO L93 Difference]: Finished difference Result 9567 states and 13676 transitions. [2022-12-14 09:47:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 09:47:07,843 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 249 [2022-12-14 09:47:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:07,862 INFO L225 Difference]: With dead ends: 9567 [2022-12-14 09:47:07,862 INFO L226 Difference]: Without dead ends: 5884 [2022-12-14 09:47:07,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 641 SyntacticMatches, 23 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7174 ImplicationChecksByTransitivity, 57.1s TimeCoverageRelationStatistics Valid=1647, Invalid=14865, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 09:47:07,875 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 2411 mSDsluCounter, 8931 mSDsCounter, 0 mSdLazyCounter, 7512 mSolverCounterSat, 1725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2431 SdHoareTripleChecker+Valid, 10059 SdHoareTripleChecker+Invalid, 9237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1725 IncrementalHoareTripleChecker+Valid, 7512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:07,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2431 Valid, 10059 Invalid, 9237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1725 Valid, 7512 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 09:47:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2022-12-14 09:47:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 5743. [2022-12-14 09:47:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5743 states, 4166 states have (on average 1.3655784925588095) internal successors, (5689), 4289 states have internal predecessors, (5689), 1021 states have call successors, (1021), 512 states have call predecessors, (1021), 555 states have return successors, (1368), 1001 states have call predecessors, (1368), 1010 states have call successors, (1368) [2022-12-14 09:47:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5743 states to 5743 states and 8078 transitions. [2022-12-14 09:47:08,202 INFO L78 Accepts]: Start accepts. Automaton has 5743 states and 8078 transitions. Word has length 249 [2022-12-14 09:47:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:08,202 INFO L495 AbstractCegarLoop]: Abstraction has 5743 states and 8078 transitions. [2022-12-14 09:47:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-12-14 09:47:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5743 states and 8078 transitions. [2022-12-14 09:47:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-12-14 09:47:08,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:08,217 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:47:08,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 09:47:08,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 09:47:08,418 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:47:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1327131965, now seen corresponding path program 1 times [2022-12-14 09:47:08,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:08,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532834121] [2022-12-14 09:47:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:08,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-12-14 09:47:08,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:08,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532834121] [2022-12-14 09:47:08,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532834121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:47:08,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:47:08,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:47:08,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606990288] [2022-12-14 09:47:08,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:47:08,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:47:08,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:47:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:47:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:47:08,646 INFO L87 Difference]: Start difference. First operand 5743 states and 8078 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-12-14 09:47:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:47:09,665 INFO L93 Difference]: Finished difference Result 14363 states and 20188 transitions. [2022-12-14 09:47:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:47:09,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 264 [2022-12-14 09:47:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:47:09,692 INFO L225 Difference]: With dead ends: 14363 [2022-12-14 09:47:09,692 INFO L226 Difference]: Without dead ends: 8853 [2022-12-14 09:47:09,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:47:09,709 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 843 mSDsluCounter, 3076 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 3724 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:47:09,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 3724 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:47:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2022-12-14 09:47:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 8506. [2022-12-14 09:47:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 6245 states have (on average 1.3477982385908727) internal successors, (8417), 6456 states have internal predecessors, (8417), 1414 states have call successors, (1414), 740 states have call predecessors, (1414), 846 states have return successors, (2079), 1369 states have call predecessors, (2079), 1403 states have call successors, (2079) [2022-12-14 09:47:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11910 transitions. [2022-12-14 09:47:10,269 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11910 transitions. Word has length 264 [2022-12-14 09:47:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:47:10,270 INFO L495 AbstractCegarLoop]: Abstraction has 8506 states and 11910 transitions. [2022-12-14 09:47:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-12-14 09:47:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11910 transitions. [2022-12-14 09:47:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-12-14 09:47:10,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:47:10,291 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:47:10,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 09:47:10,291 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:47:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:47:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash -150421198, now seen corresponding path program 1 times [2022-12-14 09:47:10,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:47:10,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829316964] [2022-12-14 09:47:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:10,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:47:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2022-12-14 09:47:10,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:47:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829316964] [2022-12-14 09:47:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829316964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:47:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344352289] [2022-12-14 09:47:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:47:10,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:47:10,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:47:10,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:47:10,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:47:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:47:11,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:47:11,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:47:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 135 proven. 26 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-12-14 09:47:11,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:47:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2022-12-14 09:47:11,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344352289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:47:11,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168525070] [2022-12-14 09:47:11,608 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2022-12-14 09:47:11,608 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:47:11,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:47:11,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:47:11,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:47:17,903 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-12-14 09:47:18,307 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-12-14 09:47:19,752 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-12-14 09:47:19,810 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-12-14 09:47:19,892 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2022-12-14 09:47:20,085 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-12-14 09:47:20,134 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-12-14 09:47:20,141 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2022-12-14 09:47:20,154 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-12-14 09:47:20,160 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 09:47:23,484 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-12-14 09:47:23,545 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-12-14 09:47:23,548 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-12-14 09:47:25,585 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-12-14 09:47:32,823 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-12-14 09:47:33,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:47:44,117 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:47:50,402 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:48:06,056 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:48:16,444 WARN L233 SmtUtils]: Spent 9.78s on a formula simplification. DAG size of input: 843 DAG size of output: 750 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:48:59,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193556#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 09:48:59,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:48:59,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:48:59,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-14 09:48:59,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476546896] [2022-12-14 09:48:59,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:48:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:48:59,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:48:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:48:59,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=888, Invalid=12222, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 09:48:59,598 INFO L87 Difference]: Start difference. First operand 8506 states and 11910 transitions. Second operand has 22 states, 17 states have (on average 10.588235294117647) internal successors, (180), 19 states have internal predecessors, (180), 8 states have call successors, (73), 5 states have call predecessors, (73), 9 states have return successors, (70), 9 states have call predecessors, (70), 8 states have call successors, (70) [2022-12-14 09:49:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:49:02,614 INFO L93 Difference]: Finished difference Result 13253 states and 18546 transitions. [2022-12-14 09:49:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 09:49:02,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 10.588235294117647) internal successors, (180), 19 states have internal predecessors, (180), 8 states have call successors, (73), 5 states have call predecessors, (73), 9 states have return successors, (70), 9 states have call predecessors, (70), 8 states have call successors, (70) Word has length 319 [2022-12-14 09:49:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:49:02,639 INFO L225 Difference]: With dead ends: 13253 [2022-12-14 09:49:02,639 INFO L226 Difference]: Without dead ends: 8637 [2022-12-14 09:49:02,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 815 SyntacticMatches, 47 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7843 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=1079, Invalid=15433, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 09:49:02,653 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 2213 mSDsluCounter, 6119 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 1251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2231 SdHoareTripleChecker+Valid, 6955 SdHoareTripleChecker+Invalid, 5767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1251 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:49:02,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2231 Valid, 6955 Invalid, 5767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1251 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 09:49:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2022-12-14 09:49:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 8476. [2022-12-14 09:49:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8476 states, 6215 states have (on average 1.3438455349959775) internal successors, (8352), 6426 states have internal predecessors, (8352), 1414 states have call successors, (1414), 740 states have call predecessors, (1414), 846 states have return successors, (2079), 1369 states have call predecessors, (2079), 1403 states have call successors, (2079) [2022-12-14 09:49:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8476 states to 8476 states and 11845 transitions. [2022-12-14 09:49:03,195 INFO L78 Accepts]: Start accepts. Automaton has 8476 states and 11845 transitions. Word has length 319 [2022-12-14 09:49:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:49:03,195 INFO L495 AbstractCegarLoop]: Abstraction has 8476 states and 11845 transitions. [2022-12-14 09:49:03,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 10.588235294117647) internal successors, (180), 19 states have internal predecessors, (180), 8 states have call successors, (73), 5 states have call predecessors, (73), 9 states have return successors, (70), 9 states have call predecessors, (70), 8 states have call successors, (70) [2022-12-14 09:49:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8476 states and 11845 transitions. [2022-12-14 09:49:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-12-14 09:49:03,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:49:03,215 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:49:03,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 09:49:03,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:49:03,416 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:49:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:49:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1848159542, now seen corresponding path program 1 times [2022-12-14 09:49:03,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:49:03,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565842308] [2022-12-14 09:49:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:49:03,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:49:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:49:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 52 proven. 33 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-12-14 09:49:03,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:49:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565842308] [2022-12-14 09:49:03,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565842308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:49:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242342255] [2022-12-14 09:49:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:49:03,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:49:03,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:49:03,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:49:03,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:49:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:49:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 2947 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:49:04,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:49:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 175 proven. 26 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-12-14 09:49:04,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:49:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 52 proven. 33 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-12-14 09:49:04,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242342255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:49:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875505105] [2022-12-14 09:49:04,586 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2022-12-14 09:49:04,586 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:49:04,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:49:04,587 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:49:04,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:49:10,959 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-12-14 09:49:11,362 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-12-14 09:49:12,892 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-12-14 09:49:12,952 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-12-14 09:49:13,018 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2022-12-14 09:49:13,235 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2022-12-14 09:49:13,280 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-12-14 09:49:13,287 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2022-12-14 09:49:13,299 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-12-14 09:49:13,305 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 09:49:16,498 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-12-14 09:49:16,552 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-12-14 09:49:16,554 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-12-14 09:49:18,851 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-12-14 09:49:27,338 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-12-14 09:49:27,757 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:49:38,114 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:49:43,933 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:49:58,606 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:50:10,051 WARN L233 SmtUtils]: Spent 10.92s on a formula simplification. DAG size of input: 843 DAG size of output: 750 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:50:53,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '226562#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 09:50:53,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:50:53,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:50:53,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-12-14 09:50:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90248787] [2022-12-14 09:50:53,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:50:53,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:50:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:53,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:50:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=10820, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 09:50:53,424 INFO L87 Difference]: Start difference. First operand 8476 states and 11845 transitions. Second operand has 15 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 5 states have call successors, (61), 4 states have call predecessors, (61), 8 states have return successors, (61), 7 states have call predecessors, (61), 5 states have call successors, (61) [2022-12-14 09:50:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:55,378 INFO L93 Difference]: Finished difference Result 13093 states and 18298 transitions. [2022-12-14 09:50:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 09:50:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 5 states have call successors, (61), 4 states have call predecessors, (61), 8 states have return successors, (61), 7 states have call predecessors, (61), 5 states have call successors, (61) Word has length 320 [2022-12-14 09:50:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:55,403 INFO L225 Difference]: With dead ends: 13093 [2022-12-14 09:50:55,403 INFO L226 Difference]: Without dead ends: 8537 [2022-12-14 09:50:55,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 825 SyntacticMatches, 43 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6269 ImplicationChecksByTransitivity, 86.0s TimeCoverageRelationStatistics Valid=833, Invalid=12739, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 09:50:55,417 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 1413 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 3658 SdHoareTripleChecker+Invalid, 3222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:55,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 3658 Invalid, 3222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 09:50:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2022-12-14 09:50:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 8476. [2022-12-14 09:50:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8476 states, 6215 states have (on average 1.3430410297666935) internal successors, (8347), 6426 states have internal predecessors, (8347), 1414 states have call successors, (1414), 740 states have call predecessors, (1414), 846 states have return successors, (2079), 1369 states have call predecessors, (2079), 1403 states have call successors, (2079) [2022-12-14 09:50:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8476 states to 8476 states and 11840 transitions. [2022-12-14 09:50:56,055 INFO L78 Accepts]: Start accepts. Automaton has 8476 states and 11840 transitions. Word has length 320 [2022-12-14 09:50:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:56,055 INFO L495 AbstractCegarLoop]: Abstraction has 8476 states and 11840 transitions. [2022-12-14 09:50:56,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 5 states have call successors, (61), 4 states have call predecessors, (61), 8 states have return successors, (61), 7 states have call predecessors, (61), 5 states have call successors, (61) [2022-12-14 09:50:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 8476 states and 11840 transitions. [2022-12-14 09:50:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-12-14 09:50:56,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:56,076 INFO L195 NwaCegarLoop]: trace histogram [15, 12, 12, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 09:50:56,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:50:56,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:50:56,277 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1451137184, now seen corresponding path program 1 times [2022-12-14 09:50:56,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:56,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249414417] [2022-12-14 09:50:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:56,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 79 proven. 30 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2022-12-14 09:50:56,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:50:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249414417] [2022-12-14 09:50:56,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249414417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:50:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895713728] [2022-12-14 09:50:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:56,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:56,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:56,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:50:56,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:50:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:56,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:50:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:50:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2022-12-14 09:50:56,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:50:56,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895713728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:50:56,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:50:56,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 09:50:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013361545] [2022-12-14 09:50:56,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:50:56,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:50:56,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:50:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:50:56,862 INFO L87 Difference]: Start difference. First operand 8476 states and 11840 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-12-14 09:50:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:57,480 INFO L93 Difference]: Finished difference Result 13757 states and 19306 transitions. [2022-12-14 09:50:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:50:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 408 [2022-12-14 09:50:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:57,505 INFO L225 Difference]: With dead ends: 13757 [2022-12-14 09:50:57,505 INFO L226 Difference]: Without dead ends: 8036 [2022-12-14 09:50:57,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:50:57,522 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 394 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:57,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 972 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:50:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8036 states. [2022-12-14 09:50:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8036 to 7979. [2022-12-14 09:50:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 5832 states have (on average 1.3329903978052127) internal successors, (7774), 6029 states have internal predecessors, (7774), 1342 states have call successors, (1342), 709 states have call predecessors, (1342), 804 states have return successors, (1901), 1300 states have call predecessors, (1901), 1331 states have call successors, (1901) [2022-12-14 09:50:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 11017 transitions. [2022-12-14 09:50:58,049 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 11017 transitions. Word has length 408 [2022-12-14 09:50:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:58,050 INFO L495 AbstractCegarLoop]: Abstraction has 7979 states and 11017 transitions. [2022-12-14 09:50:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-12-14 09:50:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 11017 transitions. [2022-12-14 09:50:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-12-14 09:50:58,067 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:58,067 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:58,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:50:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d433ff6-51ea-493f-8c84-a246f6dd1036/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:58,269 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1724752733, now seen corresponding path program 1 times [2022-12-14 09:50:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:58,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818959466] [2022-12-14 09:50:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:58,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2022-12-14 09:50:58,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:50:58,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818959466] [2022-12-14 09:50:58,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818959466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:50:58,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:50:58,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:50:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166433918] [2022-12-14 09:50:58,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:50:58,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:50:58,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:50:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:50:58,480 INFO L87 Difference]: Start difference. First operand 7979 states and 11017 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 09:50:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:59,234 INFO L93 Difference]: Finished difference Result 16032 states and 22171 transitions. [2022-12-14 09:50:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:50:59,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 334 [2022-12-14 09:50:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:59,258 INFO L225 Difference]: With dead ends: 16032 [2022-12-14 09:50:59,259 INFO L226 Difference]: Without dead ends: 8083 [2022-12-14 09:50:59,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:50:59,279 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 95 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:59,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1291 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:50:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2022-12-14 09:50:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 8083. [2022-12-14 09:50:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8083 states, 5931 states have (on average 1.3205193053447986) internal successors, (7832), 6128 states have internal predecessors, (7832), 1342 states have call successors, (1342), 714 states have call predecessors, (1342), 809 states have return successors, (1901), 1300 states have call predecessors, (1901), 1331 states have call successors, (1901) [2022-12-14 09:50:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8083 states to 8083 states and 11075 transitions. [2022-12-14 09:50:59,787 INFO L78 Accepts]: Start accepts. Automaton has 8083 states and 11075 transitions. Word has length 334 [2022-12-14 09:50:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:59,787 INFO L495 AbstractCegarLoop]: Abstraction has 8083 states and 11075 transitions. [2022-12-14 09:50:59,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (31), 1 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 09:50:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8083 states and 11075 transitions. [2022-12-14 09:50:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-12-14 09:50:59,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:59,805 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 8, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:59,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 09:50:59,805 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash -471463218, now seen corresponding path program 1 times [2022-12-14 09:50:59,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:59,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135074319] [2022-12-14 09:50:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:51:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2022-12-14 09:51:00,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:51:00,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135074319] [2022-12-14 09:51:00,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135074319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:51:00,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:51:00,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:51:00,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613856824] [2022-12-14 09:51:00,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:51:00,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:51:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:51:00,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:51:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:51:00,277 INFO L87 Difference]: Start difference. First operand 8083 states and 11075 transitions. Second operand has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (34), 1 states have call predecessors, (34), 2 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 09:51:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:51:01,417 INFO L93 Difference]: Finished difference Result 12138 states and 16670 transitions. [2022-12-14 09:51:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 09:51:01,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (34), 1 states have call predecessors, (34), 2 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) Word has length 357 [2022-12-14 09:51:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:51:01,420 INFO L225 Difference]: With dead ends: 12138 [2022-12-14 09:51:01,420 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 09:51:01,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:51:01,439 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 365 mSDsluCounter, 3589 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 4366 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:51:01,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 4366 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:51:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 09:51:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 09:51:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:51:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 09:51:01,441 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 357 [2022-12-14 09:51:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:51:01,441 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 09:51:01,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (34), 1 states have call predecessors, (34), 2 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 09:51:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 09:51:01,441 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 09:51:01,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 09:51:01,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 09:51:01,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 09:51:57,448 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 208 DAG size of output: 207 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)