./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur --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 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 --- 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-38b53e6 [2022-11-26 00:01:03,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:01:03,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:01:03,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:01:03,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:01:03,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:01:03,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:01:03,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:01:03,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:01:03,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:01:03,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:01:03,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:01:03,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:01:03,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:01:03,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:01:03,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:01:03,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:01:03,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:01:03,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:01:03,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:01:03,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:01:03,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:01:03,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:01:03,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:01:03,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:01:03,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:01:03,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:01:03,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:01:03,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:01:03,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:01:03,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:01:03,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:01:03,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:01:03,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:01:03,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:01:03,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:01:03,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:01:03,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:01:03,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:01:03,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:01:03,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:01:03,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:01:03,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:01:03,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:01:03,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:01:03,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:01:03,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:01:03,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:01:03,820 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:01:03,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:01:03,821 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:01:03,821 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:01:03,822 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:01:03,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:01:03,823 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:01:03,823 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:01:03,823 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:01:03,824 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:01:03,824 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:01:03,824 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:01:03,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:01:03,825 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:01:03,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:01:03,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:01:03,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:01:03,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:01:03,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:01:03,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:01:03,827 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:01:03,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:01:03,828 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:01:03,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:01:03,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:01:03,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:01:03,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:01:03,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:01:03,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:01:03,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:01:03,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:01:03,830 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:01:03,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:01:03,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:01:03,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:01:03,840 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_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 [2022-11-26 00:01:04,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:01:04,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:01:04,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:01:04,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:01:04,176 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:01:04,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2022-11-26 00:01:07,299 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:01:07,676 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:01:07,677 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2022-11-26 00:01:07,723 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/data/6b53ba622/d05b3ee13f2d46c99d506a4761ada6f9/FLAGc704f0cbc [2022-11-26 00:01:07,754 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/data/6b53ba622/d05b3ee13f2d46c99d506a4761ada6f9 [2022-11-26 00:01:07,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:01:07,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:01:07,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:01:07,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:01:07,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:01:07,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:01:07" (1/1) ... [2022-11-26 00:01:07,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b77adc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:07, skipping insertion in model container [2022-11-26 00:01:07,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:01:07" (1/1) ... [2022-11-26 00:01:07,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:01:07,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:01:08,492 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2022-11-26 00:01:08,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:01:08,511 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:01:08,677 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2022-11-26 00:01:08,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:01:08,707 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:01:08,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08 WrapperNode [2022-11-26 00:01:08,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:01:08,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:01:08,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:01:08,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:01:08,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,800 INFO L138 Inliner]: procedures = 97, calls = 345, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1131 [2022-11-26 00:01:08,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:01:08,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:01:08,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:01:08,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:01:08,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:01:08,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:01:08,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:01:08,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:01:08,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (1/1) ... [2022-11-26 00:01:08,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:01:08,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:08,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:01:09,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:01:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:01:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:01:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:01:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:01:09,030 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:01:09,031 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:01:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:01:09,031 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:01:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:01:09,031 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:01:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:01:09,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:01:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:01:09,032 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:01:09,032 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:01:09,033 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:01:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:01:09,033 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:01:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:01:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 00:01:09,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 00:01:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:01:09,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:01:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:01:09,035 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:01:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:01:09,036 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:01:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-26 00:01:09,037 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-26 00:01:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 00:01:09,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 00:01:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:01:09,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:01:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:01:09,040 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:01:09,040 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-26 00:01:09,040 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-26 00:01:09,040 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:01:09,040 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:01:09,040 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:01:09,041 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:01:09,041 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:01:09,041 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:01:09,041 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:01:09,042 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:01:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-26 00:01:09,043 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-26 00:01:09,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:01:09,043 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:01:09,044 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:01:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:01:09,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:01:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:01:09,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:01:09,045 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-26 00:01:09,045 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-26 00:01:09,246 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:01:09,257 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:01:10,712 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:01:11,640 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:01:11,640 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:01:11,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:01:11 BoogieIcfgContainer [2022-11-26 00:01:11,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:01:11,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:01:11,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:01:11,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:01:11,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:01:07" (1/3) ... [2022-11-26 00:01:11,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a557f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:01:11, skipping insertion in model container [2022-11-26 00:01:11,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:01:08" (2/3) ... [2022-11-26 00:01:11,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a557f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:01:11, skipping insertion in model container [2022-11-26 00:01:11,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:01:11" (3/3) ... [2022-11-26 00:01:11,664 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product28.cil.c [2022-11-26 00:01:11,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:01:11,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:01:11,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:01:11,787 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;@2753b62f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:01:11,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:01:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 253 states have (on average 1.5849802371541502) internal successors, (401), 276 states have internal predecessors, (401), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-26 00:01:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:01:11,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:11,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:11,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash 348250290, now seen corresponding path program 1 times [2022-11-26 00:01:11,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:11,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780899236] [2022-11-26 00:01:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:01:12,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780899236] [2022-11-26 00:01:12,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780899236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:12,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:12,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:01:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177499436] [2022-11-26 00:01:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:01:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:12,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:01:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:01:12,343 INFO L87 Difference]: Start difference. First operand has 378 states, 253 states have (on average 1.5849802371541502) internal successors, (401), 276 states have internal predecessors, (401), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-26 00:01:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:12,582 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2022-11-26 00:01:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:01:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-11-26 00:01:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:12,611 INFO L225 Difference]: With dead ends: 396 [2022-11-26 00:01:12,612 INFO L226 Difference]: Without dead ends: 374 [2022-11-26 00:01:12,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:01:12,622 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:12,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 550 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-26 00:01:12,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-11-26 00:01:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 251 states have (on average 1.5737051792828685) internal successors, (395), 272 states have internal predecessors, (395), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-26 00:01:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2022-11-26 00:01:12,718 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2022-11-26 00:01:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:12,720 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2022-11-26 00:01:12,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-26 00:01:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2022-11-26 00:01:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:01:12,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:12,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:01:12,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -32838999, now seen corresponding path program 1 times [2022-11-26 00:01:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:12,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97890257] [2022-11-26 00:01:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:12,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:01:13,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97890257] [2022-11-26 00:01:13,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97890257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:13,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:13,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:01:13,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953031932] [2022-11-26 00:01:13,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:01:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:01:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:01:13,342 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:01:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:15,883 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2022-11-26 00:01:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:01:15,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-26 00:01:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:15,896 INFO L225 Difference]: With dead ends: 1210 [2022-11-26 00:01:15,896 INFO L226 Difference]: Without dead ends: 852 [2022-11-26 00:01:15,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:01:15,915 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1929 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:15,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 781 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:01:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-26 00:01:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2022-11-26 00:01:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 526 states have (on average 1.5893536121673004) internal successors, (836), 556 states have internal predecessors, (836), 181 states have call successors, (181), 46 states have call predecessors, (181), 47 states have return successors, (183), 165 states have call predecessors, (183), 176 states have call successors, (183) [2022-11-26 00:01:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2022-11-26 00:01:16,008 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2022-11-26 00:01:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:16,008 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2022-11-26 00:01:16,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 00:01:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2022-11-26 00:01:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:01:16,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:16,017 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:16,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:01:16,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:16,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1611720763, now seen corresponding path program 1 times [2022-11-26 00:01:16,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113397169] [2022-11-26 00:01:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:16,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:16,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113397169] [2022-11-26 00:01:16,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113397169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:16,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:16,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:01:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873856877] [2022-11-26 00:01:16,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:16,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:01:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:01:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:01:16,629 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:01:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:19,417 INFO L93 Difference]: Finished difference Result 2329 states and 3742 transitions. [2022-11-26 00:01:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:01:19,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2022-11-26 00:01:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:19,434 INFO L225 Difference]: With dead ends: 2329 [2022-11-26 00:01:19,434 INFO L226 Difference]: Without dead ends: 1591 [2022-11-26 00:01:19,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:01:19,447 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1129 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:19,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 1470 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2495 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:01:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2022-11-26 00:01:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1522. [2022-11-26 00:01:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1071 states have (on average 1.5938375350140057) internal successors, (1707), 1127 states have internal predecessors, (1707), 354 states have call successors, (354), 89 states have call predecessors, (354), 96 states have return successors, (381), 329 states have call predecessors, (381), 349 states have call successors, (381) [2022-11-26 00:01:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2442 transitions. [2022-11-26 00:01:19,585 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2442 transitions. Word has length 88 [2022-11-26 00:01:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:19,588 INFO L495 AbstractCegarLoop]: Abstraction has 1522 states and 2442 transitions. [2022-11-26 00:01:19,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:01:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2442 transitions. [2022-11-26 00:01:19,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:01:19,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:19,598 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:19,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:01:19,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash -646781416, now seen corresponding path program 1 times [2022-11-26 00:01:19,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:19,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456976362] [2022-11-26 00:01:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:19,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:20,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:20,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456976362] [2022-11-26 00:01:20,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456976362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:20,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:20,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:01:20,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334375896] [2022-11-26 00:01:20,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:20,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:01:20,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:01:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:01:20,009 INFO L87 Difference]: Start difference. First operand 1522 states and 2442 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:01:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:20,754 INFO L93 Difference]: Finished difference Result 1621 states and 2604 transitions. [2022-11-26 00:01:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:01:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2022-11-26 00:01:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:20,778 INFO L225 Difference]: With dead ends: 1621 [2022-11-26 00:01:20,779 INFO L226 Difference]: Without dead ends: 1606 [2022-11-26 00:01:20,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:01:20,789 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 678 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:20,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1800 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:01:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-11-26 00:01:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1528. [2022-11-26 00:01:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1077 states have (on average 1.5905292479108635) internal successors, (1713), 1133 states have internal predecessors, (1713), 354 states have call successors, (354), 89 states have call predecessors, (354), 96 states have return successors, (381), 329 states have call predecessors, (381), 349 states have call successors, (381) [2022-11-26 00:01:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2448 transitions. [2022-11-26 00:01:20,949 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2448 transitions. Word has length 92 [2022-11-26 00:01:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:20,950 INFO L495 AbstractCegarLoop]: Abstraction has 1528 states and 2448 transitions. [2022-11-26 00:01:20,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:01:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2448 transitions. [2022-11-26 00:01:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:01:20,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:20,954 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:01:20,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash -473513497, now seen corresponding path program 1 times [2022-11-26 00:01:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:20,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885193730] [2022-11-26 00:01:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:21,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885193730] [2022-11-26 00:01:21,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885193730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:21,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:21,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:01:21,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789529556] [2022-11-26 00:01:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:21,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:01:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:01:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:01:21,470 INFO L87 Difference]: Start difference. First operand 1528 states and 2448 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:01:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:25,725 INFO L93 Difference]: Finished difference Result 4147 states and 6635 transitions. [2022-11-26 00:01:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:01:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 96 [2022-11-26 00:01:25,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:25,747 INFO L225 Difference]: With dead ends: 4147 [2022-11-26 00:01:25,748 INFO L226 Difference]: Without dead ends: 2635 [2022-11-26 00:01:25,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:01:25,758 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 1281 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 4327 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 4974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 4327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:25,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1354 Valid, 1972 Invalid, 4974 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [647 Valid, 4327 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 00:01:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-11-26 00:01:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2492. [2022-11-26 00:01:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 1711 states have (on average 1.5651665692577441) internal successors, (2678), 1810 states have internal predecessors, (2678), 620 states have call successors, (620), 140 states have call predecessors, (620), 160 states have return successors, (667), 585 states have call predecessors, (667), 615 states have call successors, (667) [2022-11-26 00:01:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3965 transitions. [2022-11-26 00:01:25,996 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3965 transitions. Word has length 96 [2022-11-26 00:01:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:25,996 INFO L495 AbstractCegarLoop]: Abstraction has 2492 states and 3965 transitions. [2022-11-26 00:01:25,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:01:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3965 transitions. [2022-11-26 00:01:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-26 00:01:26,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:26,001 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:26,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:01:26,002 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2024900468, now seen corresponding path program 1 times [2022-11-26 00:01:26,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:26,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52065886] [2022-11-26 00:01:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:26,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:01:26,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:26,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52065886] [2022-11-26 00:01:26,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52065886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:26,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:26,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-26 00:01:26,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049275528] [2022-11-26 00:01:26,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:26,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:01:26,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:01:26,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:01:26,683 INFO L87 Difference]: Start difference. First operand 2492 states and 3965 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:01:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:33,385 INFO L93 Difference]: Finished difference Result 2909 states and 4587 transitions. [2022-11-26 00:01:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-26 00:01:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 97 [2022-11-26 00:01:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:33,406 INFO L225 Difference]: With dead ends: 2909 [2022-11-26 00:01:33,407 INFO L226 Difference]: Without dead ends: 2892 [2022-11-26 00:01:33,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:01:33,411 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 2458 mSDsluCounter, 3104 mSDsCounter, 0 mSdLazyCounter, 8522 mSolverCounterSat, 1439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 9961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1439 IncrementalHoareTripleChecker+Valid, 8522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:33,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2484 Valid, 3610 Invalid, 9961 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1439 Valid, 8522 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-26 00:01:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-11-26 00:01:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2696. [2022-11-26 00:01:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 1866 states have (on average 1.5664523043944265) internal successors, (2923), 1963 states have internal predecessors, (2923), 638 states have call successors, (638), 172 states have call predecessors, (638), 191 states have return successors, (689), 604 states have call predecessors, (689), 633 states have call successors, (689) [2022-11-26 00:01:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 4250 transitions. [2022-11-26 00:01:33,700 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 4250 transitions. Word has length 97 [2022-11-26 00:01:33,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:33,700 INFO L495 AbstractCegarLoop]: Abstraction has 2696 states and 4250 transitions. [2022-11-26 00:01:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:01:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 4250 transitions. [2022-11-26 00:01:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-26 00:01:33,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:33,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:33,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:01:33,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash -625701306, now seen corresponding path program 1 times [2022-11-26 00:01:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:33,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634019065] [2022-11-26 00:01:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:33,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:01:33,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:33,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634019065] [2022-11-26 00:01:33,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634019065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:33,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:33,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:01:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864437825] [2022-11-26 00:01:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:33,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:01:33,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:01:33,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:33,858 INFO L87 Difference]: Start difference. First operand 2696 states and 4250 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:34,304 INFO L93 Difference]: Finished difference Result 6892 states and 10938 transitions. [2022-11-26 00:01:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:01:34,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2022-11-26 00:01:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:34,334 INFO L225 Difference]: With dead ends: 6892 [2022-11-26 00:01:34,336 INFO L226 Difference]: Without dead ends: 4216 [2022-11-26 00:01:34,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:34,350 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 540 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:34,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1196 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:34,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4216 states. [2022-11-26 00:01:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4216 to 4163. [2022-11-26 00:01:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 2891 states have (on average 1.5627810446212382) internal successors, (4518), 3048 states have internal predecessors, (4518), 977 states have call successors, (977), 260 states have call predecessors, (977), 294 states have return successors, (1091), 918 states have call predecessors, (1091), 972 states have call successors, (1091) [2022-11-26 00:01:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 6586 transitions. [2022-11-26 00:01:34,839 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 6586 transitions. Word has length 104 [2022-11-26 00:01:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:34,839 INFO L495 AbstractCegarLoop]: Abstraction has 4163 states and 6586 transitions. [2022-11-26 00:01:34,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 6586 transitions. [2022-11-26 00:01:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-26 00:01:34,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:34,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:34,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:01:34,845 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2077818767, now seen corresponding path program 1 times [2022-11-26 00:01:34,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:34,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304248772] [2022-11-26 00:01:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:01:34,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:34,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304248772] [2022-11-26 00:01:34,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304248772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:34,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:34,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:01:34,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700059667] [2022-11-26 00:01:34,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:34,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:01:34,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:01:34,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:34,978 INFO L87 Difference]: Start difference. First operand 4163 states and 6586 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:35,617 INFO L93 Difference]: Finished difference Result 11292 states and 18027 transitions. [2022-11-26 00:01:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:01:35,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2022-11-26 00:01:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:35,672 INFO L225 Difference]: With dead ends: 11292 [2022-11-26 00:01:35,672 INFO L226 Difference]: Without dead ends: 7152 [2022-11-26 00:01:35,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:35,697 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 539 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:35,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1202 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2022-11-26 00:01:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 7098. [2022-11-26 00:01:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 4942 states have (on average 1.5592877377579928) internal successors, (7706), 5219 states have internal predecessors, (7706), 1655 states have call successors, (1655), 436 states have call predecessors, (1655), 500 states have return successors, (1937), 1546 states have call predecessors, (1937), 1650 states have call successors, (1937) [2022-11-26 00:01:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 11298 transitions. [2022-11-26 00:01:36,402 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 11298 transitions. Word has length 105 [2022-11-26 00:01:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:36,403 INFO L495 AbstractCegarLoop]: Abstraction has 7098 states and 11298 transitions. [2022-11-26 00:01:36,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 11298 transitions. [2022-11-26 00:01:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-26 00:01:36,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:36,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:36,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:01:36,411 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -12400984, now seen corresponding path program 1 times [2022-11-26 00:01:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:36,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120050290] [2022-11-26 00:01:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:01:36,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:36,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120050290] [2022-11-26 00:01:36,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120050290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:36,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:36,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:01:36,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040947846] [2022-11-26 00:01:36,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:36,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:01:36,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:36,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:01:36,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:36,550 INFO L87 Difference]: Start difference. First operand 7098 states and 11298 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:37,784 INFO L93 Difference]: Finished difference Result 20093 states and 32440 transitions. [2022-11-26 00:01:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:01:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2022-11-26 00:01:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:37,877 INFO L225 Difference]: With dead ends: 20093 [2022-11-26 00:01:37,877 INFO L226 Difference]: Without dead ends: 13024 [2022-11-26 00:01:37,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:37,913 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 538 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:37,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1208 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13024 states. [2022-11-26 00:01:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13024 to 12969. [2022-11-26 00:01:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12969 states, 9045 states have (on average 1.5555555555555556) internal successors, (14070), 9562 states have internal predecessors, (14070), 3011 states have call successors, (3011), 788 states have call predecessors, (3011), 912 states have return successors, (3803), 2802 states have call predecessors, (3803), 3006 states have call successors, (3803) [2022-11-26 00:01:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12969 states to 12969 states and 20884 transitions. [2022-11-26 00:01:39,077 INFO L78 Accepts]: Start accepts. Automaton has 12969 states and 20884 transitions. Word has length 106 [2022-11-26 00:01:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:39,078 INFO L495 AbstractCegarLoop]: Abstraction has 12969 states and 20884 transitions. [2022-11-26 00:01:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 12969 states and 20884 transitions. [2022-11-26 00:01:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:01:39,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:39,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:39,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:01:39,087 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -384699919, now seen corresponding path program 1 times [2022-11-26 00:01:39,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673733891] [2022-11-26 00:01:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:39,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:01:39,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673733891] [2022-11-26 00:01:39,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673733891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:39,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:39,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:01:39,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8764276] [2022-11-26 00:01:39,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:39,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:01:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:01:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:39,276 INFO L87 Difference]: Start difference. First operand 12969 states and 20884 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:41,155 INFO L93 Difference]: Finished difference Result 37696 states and 62115 transitions. [2022-11-26 00:01:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:01:41,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-11-26 00:01:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:41,334 INFO L225 Difference]: With dead ends: 37696 [2022-11-26 00:01:41,335 INFO L226 Difference]: Without dead ends: 24768 [2022-11-26 00:01:41,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:41,406 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 537 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:41,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1214 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24768 states. [2022-11-26 00:01:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24768 to 24712. [2022-11-26 00:01:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24712 states, 17252 states have (on average 1.5514722930674705) internal successors, (26766), 18249 states have internal predecessors, (26766), 5723 states have call successors, (5723), 1492 states have call predecessors, (5723), 1736 states have return successors, (8153), 5314 states have call predecessors, (8153), 5718 states have call successors, (8153) [2022-11-26 00:01:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24712 states to 24712 states and 40642 transitions. [2022-11-26 00:01:43,793 INFO L78 Accepts]: Start accepts. Automaton has 24712 states and 40642 transitions. Word has length 107 [2022-11-26 00:01:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:43,794 INFO L495 AbstractCegarLoop]: Abstraction has 24712 states and 40642 transitions. [2022-11-26 00:01:43,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 24712 states and 40642 transitions. [2022-11-26 00:01:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 00:01:43,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:43,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:01:43,801 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:43,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:43,802 INFO L85 PathProgramCache]: Analyzing trace with hash 958938890, now seen corresponding path program 1 times [2022-11-26 00:01:43,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:43,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482628017] [2022-11-26 00:01:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:43,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:01:43,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:43,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482628017] [2022-11-26 00:01:43,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482628017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:43,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:43,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:01:43,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482320250] [2022-11-26 00:01:43,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:43,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:01:43,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:43,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:01:43,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:43,964 INFO L87 Difference]: Start difference. First operand 24712 states and 40642 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:45,837 INFO L93 Difference]: Finished difference Result 26237 states and 43346 transitions. [2022-11-26 00:01:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:01:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2022-11-26 00:01:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:45,985 INFO L225 Difference]: With dead ends: 26237 [2022-11-26 00:01:45,985 INFO L226 Difference]: Without dead ends: 26226 [2022-11-26 00:01:45,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:01:45,999 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 523 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:46,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1212 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26226 states. [2022-11-26 00:01:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26226 to 26157. [2022-11-26 00:01:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26157 states, 18258 states have (on average 1.5498411655164859) internal successors, (28297), 19317 states have internal predecessors, (28297), 6060 states have call successors, (6060), 1580 states have call predecessors, (6060), 1838 states have return successors, (8863), 5623 states have call predecessors, (8863), 6055 states have call successors, (8863) [2022-11-26 00:01:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26157 states to 26157 states and 43220 transitions. [2022-11-26 00:01:48,425 INFO L78 Accepts]: Start accepts. Automaton has 26157 states and 43220 transitions. Word has length 108 [2022-11-26 00:01:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:48,426 INFO L495 AbstractCegarLoop]: Abstraction has 26157 states and 43220 transitions. [2022-11-26 00:01:48,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 00:01:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 26157 states and 43220 transitions. [2022-11-26 00:01:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-26 00:01:48,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:48,441 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:48,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:01:48,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:48,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:48,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1243224876, now seen corresponding path program 1 times [2022-11-26 00:01:48,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:48,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468983866] [2022-11-26 00:01:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:48,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:01:48,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:48,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468983866] [2022-11-26 00:01:48,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468983866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:48,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:01:48,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:01:48,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799211385] [2022-11-26 00:01:48,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:48,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:01:48,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:01:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:01:48,755 INFO L87 Difference]: Start difference. First operand 26157 states and 43220 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-26 00:01:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:51,522 INFO L93 Difference]: Finished difference Result 53211 states and 89852 transitions. [2022-11-26 00:01:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:01:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 161 [2022-11-26 00:01:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:51,708 INFO L225 Difference]: With dead ends: 53211 [2022-11-26 00:01:51,708 INFO L226 Difference]: Without dead ends: 27075 [2022-11-26 00:01:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:01:51,798 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 30 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:51,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1627 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:01:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27075 states. [2022-11-26 00:01:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27075 to 26265. [2022-11-26 00:01:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26265 states, 18366 states have (on average 1.5466078623543504) internal successors, (28405), 19425 states have internal predecessors, (28405), 6060 states have call successors, (6060), 1580 states have call predecessors, (6060), 1838 states have return successors, (8863), 5623 states have call predecessors, (8863), 6055 states have call successors, (8863) [2022-11-26 00:01:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26265 states to 26265 states and 43328 transitions. [2022-11-26 00:01:54,511 INFO L78 Accepts]: Start accepts. Automaton has 26265 states and 43328 transitions. Word has length 161 [2022-11-26 00:01:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:01:54,511 INFO L495 AbstractCegarLoop]: Abstraction has 26265 states and 43328 transitions. [2022-11-26 00:01:54,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-26 00:01:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26265 states and 43328 transitions. [2022-11-26 00:01:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-26 00:01:54,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:01:54,522 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:01:54,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:01:54,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:01:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:01:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash 962467947, now seen corresponding path program 1 times [2022-11-26 00:01:54,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:01:54,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498731242] [2022-11-26 00:01:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:01:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-26 00:01:55,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:01:55,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498731242] [2022-11-26 00:01:55,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498731242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:01:55,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115257989] [2022-11-26 00:01:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:01:55,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:01:55,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:01:55,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:01:55,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:01:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:01:55,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:01:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:01:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:01:55,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:01:55,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115257989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:01:55,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:01:55,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-26 00:01:55,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897792120] [2022-11-26 00:01:55,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:01:55,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:01:55,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:01:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:01:55,760 INFO L87 Difference]: Start difference. First operand 26265 states and 43328 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:01:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:01:57,980 INFO L93 Difference]: Finished difference Result 54615 states and 93090 transitions. [2022-11-26 00:01:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:01:57,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 164 [2022-11-26 00:01:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:01:58,195 INFO L225 Difference]: With dead ends: 54615 [2022-11-26 00:01:58,196 INFO L226 Difference]: Without dead ends: 28371 [2022-11-26 00:01:58,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:01:58,314 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 213 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:01:58,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1419 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:01:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28371 states. [2022-11-26 00:02:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28371 to 28371. [2022-11-26 00:02:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28371 states, 20418 states have (on average 1.5842393966108337) internal successors, (32347), 21477 states have internal predecessors, (32347), 6060 states have call successors, (6060), 1634 states have call predecessors, (6060), 1892 states have return successors, (8863), 5623 states have call predecessors, (8863), 6055 states have call successors, (8863) [2022-11-26 00:02:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28371 states to 28371 states and 47270 transitions. [2022-11-26 00:02:01,344 INFO L78 Accepts]: Start accepts. Automaton has 28371 states and 47270 transitions. Word has length 164 [2022-11-26 00:02:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:01,345 INFO L495 AbstractCegarLoop]: Abstraction has 28371 states and 47270 transitions. [2022-11-26 00:02:01,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:02:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 28371 states and 47270 transitions. [2022-11-26 00:02:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-26 00:02:01,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:01,358 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:01,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:02:01,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:02:01,571 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash -915541731, now seen corresponding path program 1 times [2022-11-26 00:02:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176714467] [2022-11-26 00:02:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:02:01,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:01,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176714467] [2022-11-26 00:02:01,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176714467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:01,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051255993] [2022-11-26 00:02:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:01,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:01,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:01,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:02:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:02:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 00:02:02,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:02:02,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051255993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:02,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:02:02,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:02:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826135304] [2022-11-26 00:02:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:02,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:02:02,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:02:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:02,469 INFO L87 Difference]: Start difference. First operand 28371 states and 47270 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:02:04,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:04,556 INFO L93 Difference]: Finished difference Result 58827 states and 100834 transitions. [2022-11-26 00:02:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:02:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 169 [2022-11-26 00:02:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:04,754 INFO L225 Difference]: With dead ends: 58827 [2022-11-26 00:02:04,755 INFO L226 Difference]: Without dead ends: 30477 [2022-11-26 00:02:04,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:04,889 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 211 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:04,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1419 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:02:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30477 states. [2022-11-26 00:02:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30477 to 30477. [2022-11-26 00:02:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30477 states, 22470 states have (on average 1.6149977748108588) internal successors, (36289), 23529 states have internal predecessors, (36289), 6060 states have call successors, (6060), 1688 states have call predecessors, (6060), 1946 states have return successors, (8863), 5623 states have call predecessors, (8863), 6055 states have call successors, (8863) [2022-11-26 00:02:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30477 states to 30477 states and 51212 transitions. [2022-11-26 00:02:07,307 INFO L78 Accepts]: Start accepts. Automaton has 30477 states and 51212 transitions. Word has length 169 [2022-11-26 00:02:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:07,307 INFO L495 AbstractCegarLoop]: Abstraction has 30477 states and 51212 transitions. [2022-11-26 00:02:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:02:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 30477 states and 51212 transitions. [2022-11-26 00:02:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-26 00:02:07,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:07,318 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:07,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:02:07,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:02:07,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash -591608291, now seen corresponding path program 1 times [2022-11-26 00:02:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:07,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702561125] [2022-11-26 00:02:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-26 00:02:07,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:07,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702561125] [2022-11-26 00:02:07,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702561125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:07,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33555054] [2022-11-26 00:02:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:07,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:07,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:07,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:07,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:02:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:02:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:02:08,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:02:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33555054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:08,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:02:08,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:02:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217674464] [2022-11-26 00:02:08,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:02:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:02:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:08,348 INFO L87 Difference]: Start difference. First operand 30477 states and 51212 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:02:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:10,592 INFO L93 Difference]: Finished difference Result 63039 states and 108578 transitions. [2022-11-26 00:02:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:02:10,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 173 [2022-11-26 00:02:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:10,754 INFO L225 Difference]: With dead ends: 63039 [2022-11-26 00:02:10,754 INFO L226 Difference]: Without dead ends: 32583 [2022-11-26 00:02:10,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:10,860 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 209 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:10,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1419 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:02:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32583 states. [2022-11-26 00:02:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32583 to 32583. [2022-11-26 00:02:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32583 states, 24522 states have (on average 1.640608433243618) internal successors, (40231), 25581 states have internal predecessors, (40231), 6060 states have call successors, (6060), 1742 states have call predecessors, (6060), 2000 states have return successors, (8863), 5623 states have call predecessors, (8863), 6055 states have call successors, (8863) [2022-11-26 00:02:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32583 states to 32583 states and 55154 transitions. [2022-11-26 00:02:13,214 INFO L78 Accepts]: Start accepts. Automaton has 32583 states and 55154 transitions. Word has length 173 [2022-11-26 00:02:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:13,215 INFO L495 AbstractCegarLoop]: Abstraction has 32583 states and 55154 transitions. [2022-11-26 00:02:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:02:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32583 states and 55154 transitions. [2022-11-26 00:02:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-26 00:02:13,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:13,226 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:13,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:13,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:13,435 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash -372071029, now seen corresponding path program 1 times [2022-11-26 00:02:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:13,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804181480] [2022-11-26 00:02:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:02:17,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:17,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804181480] [2022-11-26 00:02:17,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804181480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:02:17,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547484817] [2022-11-26 00:02:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:17,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:17,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f99f950d-8508-4697-99a9-bd0c67746a9d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:02:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:17,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:02:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 00:02:17,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:02:17,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547484817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:17,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:02:17,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [30] total 32 [2022-11-26 00:02:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650188848] [2022-11-26 00:02:17,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:17,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:02:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:02:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:02:17,570 INFO L87 Difference]: Start difference. First operand 32583 states and 55154 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:02:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:19,702 INFO L93 Difference]: Finished difference Result 67251 states and 116322 transitions. [2022-11-26 00:02:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:02:19,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 176 [2022-11-26 00:02:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:19,868 INFO L225 Difference]: With dead ends: 67251 [2022-11-26 00:02:19,868 INFO L226 Difference]: Without dead ends: 34689 [2022-11-26 00:02:19,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:02:19,982 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 207 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:19,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1419 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34689 states.