./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI --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 b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 --- 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-5e519f3 [2022-11-03 01:48:23,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:48:23,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:48:23,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:48:23,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:48:23,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:48:23,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:48:23,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:48:23,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:48:23,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:48:23,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:48:23,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:48:23,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:48:23,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:48:23,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:48:23,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:48:23,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:48:23,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:48:23,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:48:23,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:48:23,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:48:23,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:48:23,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:48:23,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:48:23,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:48:23,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:48:23,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:48:23,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:48:23,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:48:23,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:48:23,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:48:23,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:48:23,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:48:23,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:48:23,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:48:23,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:48:23,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:48:23,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:48:23,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:48:23,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:48:23,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:48:23,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:48:23,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:48:23,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:48:23,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:48:23,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:48:23,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:48:23,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:48:23,686 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:48:23,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:48:23,687 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:48:23,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:48:23,688 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:48:23,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:48:23,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:48:23,688 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:48:23,689 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:48:23,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:48:23,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:48:23,690 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:48:23,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:48:23,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:48:23,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:48:23,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:48:23,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:48:23,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:48:23,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:48:23,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:48:23,693 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:48:23,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:48:23,694 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:48:23,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:48:23,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:48:23,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:48:23,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:23,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:48:23,695 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:48:23,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:48:23,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:48:23,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:48:23,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:48:23,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:48:23,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:48:23,697 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_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 [2022-11-03 01:48:23,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:48:23,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:48:23,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:48:23,995 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:48:23,996 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:48:23,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2022-11-03 01:48:24,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/data/7f1a90bf4/5ec5534fe41e4e1a842622623d5fa417/FLAG81c4da495 [2022-11-03 01:48:24,706 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:48:24,707 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2022-11-03 01:48:24,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/data/7f1a90bf4/5ec5534fe41e4e1a842622623d5fa417/FLAG81c4da495 [2022-11-03 01:48:24,934 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/data/7f1a90bf4/5ec5534fe41e4e1a842622623d5fa417 [2022-11-03 01:48:24,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:48:24,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:48:24,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:24,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:48:24,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:48:24,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:24" (1/1) ... [2022-11-03 01:48:24,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfec11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:24, skipping insertion in model container [2022-11-03 01:48:24,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:24" (1/1) ... [2022-11-03 01:48:24,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:48:25,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:48:25,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2022-11-03 01:48:25,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:25,667 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:48:25,762 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2022-11-03 01:48:25,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:25,820 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:48:25,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25 WrapperNode [2022-11-03 01:48:25,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:25,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:25,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:48:25,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:48:25,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:25,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:25,938 INFO L138 Inliner]: procedures = 94, calls = 352, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 1112 [2022-11-03 01:48:25,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:25,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:48:25,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:48:25,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:48:25,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:25,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:25,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:25,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:26,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:26,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:26,046 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:26,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:26,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:48:26,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:48:26,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:48:26,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:48:26,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:26,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:26,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:48:26,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:48:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:48:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 01:48:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 01:48:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 01:48:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 01:48:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-03 01:48:26,154 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-03 01:48:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 01:48:26,154 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 01:48:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 01:48:26,154 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 01:48:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 01:48:26,155 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 01:48:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 01:48:26,155 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 01:48:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 01:48:26,155 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 01:48:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 01:48:26,156 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 01:48:26,156 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 01:48:26,156 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 01:48:26,156 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 01:48:26,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 01:48:26,156 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 01:48:26,156 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 01:48:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 01:48:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 01:48:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 01:48:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 01:48:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 01:48:26,158 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 01:48:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-03 01:48:26,158 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-03 01:48:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 01:48:26,159 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 01:48:26,159 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-03 01:48:26,159 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-03 01:48:26,159 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 01:48:26,159 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 01:48:26,159 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 01:48:26,160 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 01:48:26,160 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 01:48:26,160 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 01:48:26,160 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 01:48:26,161 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 01:48:26,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:48:26,162 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 01:48:26,162 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 01:48:26,163 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 01:48:26,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 01:48:26,163 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 01:48:26,163 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 01:48:26,163 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 01:48:26,164 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 01:48:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:48:26,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:48:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 01:48:26,165 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 01:48:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 01:48:26,165 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 01:48:26,407 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:48:26,410 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:48:27,746 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:48:28,526 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:48:28,527 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:48:28,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:28 BoogieIcfgContainer [2022-11-03 01:48:28,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:48:28,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:48:28,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:48:28,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:48:28,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:48:24" (1/3) ... [2022-11-03 01:48:28,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d59d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:28, skipping insertion in model container [2022-11-03 01:48:28,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25" (2/3) ... [2022-11-03 01:48:28,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d59d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:28, skipping insertion in model container [2022-11-03 01:48:28,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:28" (3/3) ... [2022-11-03 01:48:28,542 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product20.cil.c [2022-11-03 01:48:28,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:48:28,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:48:28,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:48:28,648 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;@4b970a4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:48:28,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:48:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2022-11-03 01:48:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:48:28,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:28,666 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:48:28,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash -280330475, now seen corresponding path program 1 times [2022-11-03 01:48:28,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:28,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687250285] [2022-11-03 01:48:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:48:29,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:29,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687250285] [2022-11-03 01:48:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687250285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546269139] [2022-11-03 01:48:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:29,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:29,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:29,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:48:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:29,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:29,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:29,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546269139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:29,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:29,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:48:29,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572437425] [2022-11-03 01:48:29,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:29,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:29,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:29,996 INFO L87 Difference]: Start difference. First operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 01:48:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:30,406 INFO L93 Difference]: Finished difference Result 1174 states and 1866 transitions. [2022-11-03 01:48:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2022-11-03 01:48:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:30,428 INFO L225 Difference]: With dead ends: 1174 [2022-11-03 01:48:30,428 INFO L226 Difference]: Without dead ends: 759 [2022-11-03 01:48:30,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:30,440 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 554 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:30,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1328 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-11-03 01:48:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 747. [2022-11-03 01:48:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 501 states have (on average 1.558882235528942) internal successors, (781), 536 states have internal predecessors, (781), 195 states have call successors, (195), 51 states have call predecessors, (195), 50 states have return successors, (197), 187 states have call predecessors, (197), 192 states have call successors, (197) [2022-11-03 01:48:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1173 transitions. [2022-11-03 01:48:30,554 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1173 transitions. Word has length 50 [2022-11-03 01:48:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:30,555 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1173 transitions. [2022-11-03 01:48:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 01:48:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1173 transitions. [2022-11-03 01:48:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:48:30,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:30,559 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:48:30,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:30,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash 126027497, now seen corresponding path program 1 times [2022-11-03 01:48:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:30,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796210007] [2022-11-03 01:48:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:48:31,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:31,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796210007] [2022-11-03 01:48:31,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796210007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128325296] [2022-11-03 01:48:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:31,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:31,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:31,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:31,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:48:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:31,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:31,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128325296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:31,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:31,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:48:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866455436] [2022-11-03 01:48:31,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:31,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:31,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:31,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:31,565 INFO L87 Difference]: Start difference. First operand 747 states and 1173 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:48:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:31,774 INFO L93 Difference]: Finished difference Result 1830 states and 2904 transitions. [2022-11-03 01:48:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:31,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2022-11-03 01:48:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:31,783 INFO L225 Difference]: With dead ends: 1830 [2022-11-03 01:48:31,783 INFO L226 Difference]: Without dead ends: 1095 [2022-11-03 01:48:31,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:31,789 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 609 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:31,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1206 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-11-03 01:48:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1071. [2022-11-03 01:48:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 722 states have (on average 1.5664819944598338) internal successors, (1131), 774 states have internal predecessors, (1131), 277 states have call successors, (277), 71 states have call predecessors, (277), 71 states have return successors, (284), 267 states have call predecessors, (284), 274 states have call successors, (284) [2022-11-03 01:48:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1692 transitions. [2022-11-03 01:48:31,892 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1692 transitions. Word has length 49 [2022-11-03 01:48:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:31,892 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1692 transitions. [2022-11-03 01:48:31,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:48:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1692 transitions. [2022-11-03 01:48:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:48:31,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:31,898 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:48:31,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:32,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:32,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1420620201, now seen corresponding path program 1 times [2022-11-03 01:48:32,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:32,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182264613] [2022-11-03 01:48:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:32,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:48:32,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182264613] [2022-11-03 01:48:32,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182264613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:32,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:32,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:32,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396336226] [2022-11-03 01:48:32,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:32,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:32,430 INFO L87 Difference]: Start difference. First operand 1071 states and 1692 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:48:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:32,787 INFO L93 Difference]: Finished difference Result 3183 states and 5080 transitions. [2022-11-03 01:48:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-11-03 01:48:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:32,803 INFO L225 Difference]: With dead ends: 3183 [2022-11-03 01:48:32,803 INFO L226 Difference]: Without dead ends: 2124 [2022-11-03 01:48:32,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:32,810 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 609 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:32,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1340 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-11-03 01:48:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2006. [2022-11-03 01:48:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 1395 states have (on average 1.5842293906810037) internal successors, (2210), 1476 states have internal predecessors, (2210), 485 states have call successors, (485), 124 states have call predecessors, (485), 125 states have return successors, (520), 450 states have call predecessors, (520), 481 states have call successors, (520) [2022-11-03 01:48:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3215 transitions. [2022-11-03 01:48:33,007 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3215 transitions. Word has length 50 [2022-11-03 01:48:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:33,013 INFO L495 AbstractCegarLoop]: Abstraction has 2006 states and 3215 transitions. [2022-11-03 01:48:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:48:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3215 transitions. [2022-11-03 01:48:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 01:48:33,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:33,032 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:33,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:48:33,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:33,038 INFO L85 PathProgramCache]: Analyzing trace with hash -403940645, now seen corresponding path program 1 times [2022-11-03 01:48:33,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:33,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235827400] [2022-11-03 01:48:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:33,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:48:33,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235827400] [2022-11-03 01:48:33,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235827400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:33,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:33,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:48:33,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077330622] [2022-11-03 01:48:33,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:48:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:48:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:48:33,462 INFO L87 Difference]: Start difference. First operand 2006 states and 3215 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 01:48:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:33,829 INFO L93 Difference]: Finished difference Result 4665 states and 7428 transitions. [2022-11-03 01:48:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:48:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 93 [2022-11-03 01:48:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:33,852 INFO L225 Difference]: With dead ends: 4665 [2022-11-03 01:48:33,853 INFO L226 Difference]: Without dead ends: 2671 [2022-11-03 01:48:33,863 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 [2022-11-03 01:48:33,865 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 459 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:33,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1717 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2022-11-03 01:48:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2627. [2022-11-03 01:48:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 1809 states have (on average 1.529574350469873) internal successors, (2767), 1897 states have internal predecessors, (2767), 620 states have call successors, (620), 182 states have call predecessors, (620), 197 states have return successors, (748), 589 states have call predecessors, (748), 614 states have call successors, (748) [2022-11-03 01:48:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 4135 transitions. [2022-11-03 01:48:34,060 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 4135 transitions. Word has length 93 [2022-11-03 01:48:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:34,060 INFO L495 AbstractCegarLoop]: Abstraction has 2627 states and 4135 transitions. [2022-11-03 01:48:34,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 01:48:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 4135 transitions. [2022-11-03 01:48:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:48:34,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:34,067 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:34,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:48:34,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1003425394, now seen corresponding path program 1 times [2022-11-03 01:48:34,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:34,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332841342] [2022-11-03 01:48:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:48:34,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:34,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332841342] [2022-11-03 01:48:34,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332841342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:34,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:34,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:48:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977214864] [2022-11-03 01:48:34,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:48:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:34,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:48:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:34,521 INFO L87 Difference]: Start difference. First operand 2627 states and 4135 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 01:48:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:35,652 INFO L93 Difference]: Finished difference Result 6856 states and 11243 transitions. [2022-11-03 01:48:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:48:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-11-03 01:48:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:35,689 INFO L225 Difference]: With dead ends: 6856 [2022-11-03 01:48:35,689 INFO L226 Difference]: Without dead ends: 4241 [2022-11-03 01:48:35,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:48:35,711 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 681 mSDsluCounter, 2816 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:35,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 3440 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:48:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2022-11-03 01:48:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3828. [2022-11-03 01:48:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 2642 states have (on average 1.5208175624526874) internal successors, (4018), 2781 states have internal predecessors, (4018), 892 states have call successors, (892), 270 states have call predecessors, (892), 293 states have return successors, (1164), 842 states have call predecessors, (1164), 884 states have call successors, (1164) [2022-11-03 01:48:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 6074 transitions. [2022-11-03 01:48:36,033 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 6074 transitions. Word has length 94 [2022-11-03 01:48:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:36,033 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 6074 transitions. [2022-11-03 01:48:36,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 01:48:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 6074 transitions. [2022-11-03 01:48:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 01:48:36,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:36,042 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:48:36,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 221262206, now seen corresponding path program 1 times [2022-11-03 01:48:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:36,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076491713] [2022-11-03 01:48:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:36,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:36,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076491713] [2022-11-03 01:48:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076491713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:36,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411975218] [2022-11-03 01:48:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:36,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:36,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:36,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:48:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:48:36,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:48:36,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:36,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411975218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:36,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:36,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 01:48:36,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261809043] [2022-11-03 01:48:36,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:36,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:48:36,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:48:36,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:48:36,972 INFO L87 Difference]: Start difference. First operand 3828 states and 6074 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:48:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:38,197 INFO L93 Difference]: Finished difference Result 10037 states and 16369 transitions. [2022-11-03 01:48:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:48:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-11-03 01:48:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:38,246 INFO L225 Difference]: With dead ends: 10037 [2022-11-03 01:48:38,247 INFO L226 Difference]: Without dead ends: 6221 [2022-11-03 01:48:38,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:48:38,279 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 536 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:38,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 3166 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:48:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6221 states. [2022-11-03 01:48:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6221 to 5990. [2022-11-03 01:48:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 4138 states have (on average 1.4804253262445626) internal successors, (6126), 4369 states have internal predecessors, (6126), 1384 states have call successors, (1384), 441 states have call predecessors, (1384), 467 states have return successors, (1827), 1285 states have call predecessors, (1827), 1373 states have call successors, (1827) [2022-11-03 01:48:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 9337 transitions. [2022-11-03 01:48:38,857 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 9337 transitions. Word has length 95 [2022-11-03 01:48:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:38,860 INFO L495 AbstractCegarLoop]: Abstraction has 5990 states and 9337 transitions. [2022-11-03 01:48:38,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:48:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 9337 transitions. [2022-11-03 01:48:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:48:38,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:38,864 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:38,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:39,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:48:39,090 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1834462678, now seen corresponding path program 1 times [2022-11-03 01:48:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818805625] [2022-11-03 01:48:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:48:39,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818805625] [2022-11-03 01:48:39,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818805625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462922567] [2022-11-03 01:48:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:39,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:39,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:39,375 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:39,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:48:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:39,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:48:39,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:39,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462922567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:39,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:39,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:48:39,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069728839] [2022-11-03 01:48:39,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:39,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:39,865 INFO L87 Difference]: Start difference. First operand 5990 states and 9337 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:48:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:40,466 INFO L93 Difference]: Finished difference Result 13324 states and 21095 transitions. [2022-11-03 01:48:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:40,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-03 01:48:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:40,539 INFO L225 Difference]: With dead ends: 13324 [2022-11-03 01:48:40,539 INFO L226 Difference]: Without dead ends: 7346 [2022-11-03 01:48:40,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:40,580 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 570 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:40,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1309 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7346 states. [2022-11-03 01:48:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7346 to 5883. [2022-11-03 01:48:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5883 states, 4066 states have (on average 1.4746679783571077) internal successors, (5996), 4295 states have internal predecessors, (5996), 1364 states have call successors, (1364), 432 states have call predecessors, (1364), 452 states have return successors, (1751), 1261 states have call predecessors, (1751), 1353 states have call successors, (1751) [2022-11-03 01:48:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5883 states to 5883 states and 9111 transitions. [2022-11-03 01:48:41,253 INFO L78 Accepts]: Start accepts. Automaton has 5883 states and 9111 transitions. Word has length 94 [2022-11-03 01:48:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:41,253 INFO L495 AbstractCegarLoop]: Abstraction has 5883 states and 9111 transitions. [2022-11-03 01:48:41,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:48:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5883 states and 9111 transitions. [2022-11-03 01:48:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 01:48:41,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:41,262 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:41,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:41,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:41,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1659856391, now seen corresponding path program 1 times [2022-11-03 01:48:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:41,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438330286] [2022-11-03 01:48:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:48:42,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:42,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438330286] [2022-11-03 01:48:42,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438330286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:42,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500336869] [2022-11-03 01:48:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:42,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:42,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:42,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:48:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:48:42,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:48:43,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:48:43,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500336869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596509769] [2022-11-03 01:48:43,540 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-03 01:48:43,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:48:43,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:48:43,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:48:43,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:48:50,071 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-03 01:48:59,419 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-11-03 01:48:59,810 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-03 01:49:02,277 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-03 01:49:02,558 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-03 01:49:02,634 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-03 01:49:02,709 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-03 01:49:07,182 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-03 01:49:07,885 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-03 01:49:08,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:41,754 WARN L234 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:49:49,121 WARN L234 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:49:57,894 WARN L234 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:16,364 WARN L234 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:22,370 WARN L234 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:30,445 WARN L234 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 630 DAG size of output: 599 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:36,602 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 628 DAG size of output: 599 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:49,425 WARN L234 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:01,910 WARN L234 SmtUtils]: Spent 11.31s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:08,625 WARN L234 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 634 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:15,251 WARN L234 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 632 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:23,178 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 637 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:29,984 WARN L234 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 637 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:29,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1596509769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:29,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:29,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-11-03 01:51:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300361164] [2022-11-03 01:51:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:29,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 01:51:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 01:51:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 01:51:29,997 INFO L87 Difference]: Start difference. First operand 5883 states and 9111 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-03 01:51:37,369 WARN L234 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:43,839 WARN L234 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:50,212 WARN L234 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:55,926 WARN L234 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:52:08,058 WARN L234 SmtUtils]: Spent 11.32s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:52:20,028 WARN L234 SmtUtils]: Spent 11.56s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:53:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:07,402 INFO L93 Difference]: Finished difference Result 11899 states and 18432 transitions. [2022-11-03 01:53:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 01:53:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-11-03 01:53:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:07,439 INFO L225 Difference]: With dead ends: 11899 [2022-11-03 01:53:07,439 INFO L226 Difference]: Without dead ends: 6028 [2022-11-03 01:53:07,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 189.0s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 01:53:07,464 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 277 mSDsluCounter, 4713 mSDsCounter, 0 mSdLazyCounter, 8722 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 5315 SdHoareTripleChecker+Invalid, 8823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 8722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:07,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 5315 Invalid, 8823 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [101 Valid, 8722 Invalid, 0 Unknown, 0 Unchecked, 49.7s Time] [2022-11-03 01:53:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2022-11-03 01:53:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 5949. [2022-11-03 01:53:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 4112 states have (on average 1.4708171206225682) internal successors, (6048), 4340 states have internal predecessors, (6048), 1377 states have call successors, (1377), 441 states have call predecessors, (1377), 459 states have return successors, (1765), 1273 states have call predecessors, (1765), 1366 states have call successors, (1765) [2022-11-03 01:53:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 9190 transitions. [2022-11-03 01:53:08,101 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 9190 transitions. Word has length 100 [2022-11-03 01:53:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:08,101 INFO L495 AbstractCegarLoop]: Abstraction has 5949 states and 9190 transitions. [2022-11-03 01:53:08,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-03 01:53:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 9190 transitions. [2022-11-03 01:53:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 01:53:08,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:08,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:08,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:08,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:08,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:08,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 788771026, now seen corresponding path program 1 times [2022-11-03 01:53:08,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:08,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871991324] [2022-11-03 01:53:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:08,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:53:08,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:08,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871991324] [2022-11-03 01:53:08,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871991324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:08,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418006648] [2022-11-03 01:53:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:08,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:08,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:08,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:08,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:53:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:53:09,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:53:09,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:53:09,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418006648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554261311] [2022-11-03 01:53:09,775 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-11-03 01:53:09,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:09,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:09,776 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:09,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:14,066 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-03 01:53:23,333 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-11-03 01:53:23,344 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-03 01:53:25,430 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-03 01:53:25,633 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-03 01:53:25,705 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-03 01:53:25,776 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-03 01:53:29,612 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-03 01:53:30,211 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-03 01:53:30,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:02,906 WARN L234 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:10,125 WARN L234 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:18,731 WARN L234 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:36,720 WARN L234 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:42,540 WARN L234 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 622 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:50,416 WARN L234 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 630 DAG size of output: 599 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:56,528 WARN L234 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 630 DAG size of output: 599 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:03,301 WARN L234 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 634 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:09,478 WARN L234 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 632 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:16,797 WARN L234 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 637 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:23,115 WARN L234 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 635 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:30,689 WARN L234 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 640 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:37,156 WARN L234 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 638 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:37,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [554261311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:37,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:37,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-11-03 01:55:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959121931] [2022-11-03 01:55:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 01:55:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 01:55:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 01:55:37,167 INFO L87 Difference]: Start difference. First operand 5949 states and 9190 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-03 01:55:43,952 WARN L234 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:50,251 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:55:56,481 WARN L234 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:02,052 WARN L234 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:07,780 WARN L234 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 605 DAG size of output: 585 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:13,133 WARN L234 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 611 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:56:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:54,690 INFO L93 Difference]: Finished difference Result 11877 states and 18393 transitions. [2022-11-03 01:56:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 01:56:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2022-11-03 01:56:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:54,726 INFO L225 Difference]: With dead ends: 11877 [2022-11-03 01:56:54,726 INFO L226 Difference]: Without dead ends: 6018 [2022-11-03 01:56:54,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 270 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 160.1s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:56:54,752 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 276 mSDsluCounter, 4002 mSDsCounter, 0 mSdLazyCounter, 8177 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 4619 SdHoareTripleChecker+Invalid, 8278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 8177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:54,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 4619 Invalid, 8278 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [101 Valid, 8177 Invalid, 0 Unknown, 0 Unchecked, 43.5s Time] [2022-11-03 01:56:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2022-11-03 01:56:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 5951. [2022-11-03 01:56:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5951 states, 4113 states have (on average 1.4704595185995624) internal successors, (6048), 4341 states have internal predecessors, (6048), 1377 states have call successors, (1377), 442 states have call predecessors, (1377), 460 states have return successors, (1765), 1273 states have call predecessors, (1765), 1366 states have call successors, (1765) [2022-11-03 01:56:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5951 states to 5951 states and 9190 transitions. [2022-11-03 01:56:55,299 INFO L78 Accepts]: Start accepts. Automaton has 5951 states and 9190 transitions. Word has length 106 [2022-11-03 01:56:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:55,300 INFO L495 AbstractCegarLoop]: Abstraction has 5951 states and 9190 transitions. [2022-11-03 01:56:55,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-03 01:56:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 5951 states and 9190 transitions. [2022-11-03 01:56:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 01:56:55,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:55,304 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:55,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:55,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:55,519 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1868943789, now seen corresponding path program 1 times [2022-11-03 01:56:55,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:55,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703183306] [2022-11-03 01:56:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:55,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:56:55,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:55,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703183306] [2022-11-03 01:56:55,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703183306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:55,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272462327] [2022-11-03 01:56:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:55,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:55,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58206c08-2edd-4a3c-a1dc-6fdba87ebb2b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:56:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:56,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:56:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:56:56,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:56:57,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272462327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:57,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [633021629] [2022-11-03 01:56:57,009 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-11-03 01:56:57,010 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:57,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:57,011 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:57,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:01,066 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-03 01:57:12,687 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-11-03 01:57:12,960 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-03 01:57:15,220 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-03 01:57:15,460 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-03 01:57:15,533 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-03 01:57:15,633 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-03 01:57:19,622 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-03 01:57:20,398 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-03 01:57:20,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:53,130 WARN L234 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:00,354 WARN L234 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:08,981 WARN L234 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:27,057 WARN L234 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:32,979 WARN L234 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:40,880 WARN L234 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 630 DAG size of output: 599 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:46,989 WARN L234 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 630 DAG size of output: 599 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:02,242 WARN L234 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 634 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:08,477 WARN L234 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 632 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:15,823 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 637 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:22,142 WARN L234 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 635 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:29,784 WARN L234 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 640 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:36,259 WARN L234 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 640 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:43,990 WARN L234 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 643 DAG size of output: 604 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:50,483 WARN L234 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 641 DAG size of output: 604 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [633021629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:50,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:50,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-11-03 01:59:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652724726] [2022-11-03 01:59:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 01:59:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 01:59:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 01:59:50,493 INFO L87 Difference]: Start difference. First operand 5951 states and 9190 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-03 01:59:57,328 WARN L234 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:03,577 WARN L234 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:15,232 WARN L234 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:24,045 WARN L234 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:32,515 WARN L234 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)