./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/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_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/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_d4e8e411-89ab-4db8-8479-313eb5771a68/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 c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c --- 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 01:01:54,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:01:54,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:01:54,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:01:54,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:01:54,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:01:54,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:01:54,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:01:54,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:01:54,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:01:54,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:01:54,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:01:54,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:01:54,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:01:54,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:01:54,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:01:54,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:01:54,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:01:54,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:01:54,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:01:54,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:01:54,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:01:54,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:01:54,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:01:54,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:01:54,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:01:54,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:01:54,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:01:54,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:01:54,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:01:54,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:01:54,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:01:54,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:01:54,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:01:54,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:01:54,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:01:54,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:01:54,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:01:54,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:01:54,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:01:54,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:01:54,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:01:54,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:01:54,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:01:54,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:01:54,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:01:54,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:01:54,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:01:54,912 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:01:54,912 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:01:54,912 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:01:54,913 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:01:54,913 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:01:54,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:01:54,913 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:01:54,914 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:01:54,914 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:01:54,914 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:01:54,915 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:01:54,915 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:01:54,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:01:54,916 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:01:54,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:01:54,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:01:54,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:01:54,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:01:54,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:01:54,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:01:54,918 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:01:54,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:01:54,919 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:01:54,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:01:54,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:01:54,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:01:54,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:54,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:01:54,921 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:01:54,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:01:54,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:01:54,921 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:01:54,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:01:54,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:01:54,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:01:54,923 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_d4e8e411-89ab-4db8-8479-313eb5771a68/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c [2022-11-26 01:01:55,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:01:55,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:01:55,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:01:55,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:01:55,301 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:01:55,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2022-11-26 01:01:58,752 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:01:59,139 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:01:59,139 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2022-11-26 01:01:59,167 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/data/b7bbdca9f/654c2137b6d74cd48d9773821092826f/FLAG6d03e4af1 [2022-11-26 01:01:59,186 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/data/b7bbdca9f/654c2137b6d74cd48d9773821092826f [2022-11-26 01:01:59,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:01:59,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:01:59,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:59,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:01:59,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:01:59,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:01:59,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60efcff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59, skipping insertion in model container [2022-11-26 01:01:59,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:01:59,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:01:59,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:01:59,607 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_d4e8e411-89ab-4db8-8479-313eb5771a68/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2022-11-26 01:01:59,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:59,915 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:01:59,939 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_d4e8e411-89ab-4db8-8479-313eb5771a68/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2022-11-26 01:02:00,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:02:00,107 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:02:00,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00 WrapperNode [2022-11-26 01:02:00,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:02:00,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:02:00,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:02:00,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:02:00,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,211 INFO L138 Inliner]: procedures = 88, calls = 338, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 798 [2022-11-26 01:02:00,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:02:00,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:02:00,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:02:00,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:02:00,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,276 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:02:00,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:02:00,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:02:00,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:02:00,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (1/1) ... [2022-11-26 01:02:00,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:02:00,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:00,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:02:00,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:02:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:02:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-26 01:02:00,387 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-26 01:02:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 01:02:00,387 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 01:02:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 01:02:00,388 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 01:02:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 01:02:00,388 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 01:02:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 01:02:00,388 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 01:02:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 01:02:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 01:02:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 01:02:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 01:02:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 01:02:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 01:02:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 01:02:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 01:02:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 01:02:00,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 01:02:00,390 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 01:02:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 01:02:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 01:02:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 01:02:00,396 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-26 01:02:00,396 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-26 01:02:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 01:02:00,397 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 01:02:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-26 01:02:00,397 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-26 01:02:00,397 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 01:02:00,397 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 01:02:00,398 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 01:02:00,398 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 01:02:00,398 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 01:02:00,398 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 01:02:00,398 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 01:02:00,399 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 01:02:00,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:02:00,399 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-26 01:02:00,399 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-26 01:02:00,399 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 01:02:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 01:02:00,400 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 01:02:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 01:02:00,400 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 01:02:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 01:02:00,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:02:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:02:00,401 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 01:02:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 01:02:00,561 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:02:00,564 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:02:01,992 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:02:02,892 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:02:02,892 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:02:02,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:02 BoogieIcfgContainer [2022-11-26 01:02:02,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:02:02,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:02:02,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:02:02,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:02:02,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:01:59" (1/3) ... [2022-11-26 01:02:02,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d7d83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:02, skipping insertion in model container [2022-11-26 01:02:02,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:00" (2/3) ... [2022-11-26 01:02:02,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d7d83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:02, skipping insertion in model container [2022-11-26 01:02:02,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:02" (3/3) ... [2022-11-26 01:02:02,912 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2022-11-26 01:02:02,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:02:02,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:02:03,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:02:03,018 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;@3b726302, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:02:03,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:02:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-26 01:02:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 01:02:03,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:03,046 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:03,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1922019369, now seen corresponding path program 1 times [2022-11-26 01:02:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:03,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863178957] [2022-11-26 01:02:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:03,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863178957] [2022-11-26 01:02:03,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863178957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:03,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770710254] [2022-11-26 01:02:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:03,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:03,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:03,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:03,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:02:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1524 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:02:04,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:04,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:04,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770710254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:04,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:04,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:02:04,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654615693] [2022-11-26 01:02:04,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:04,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:04,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:04,495 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 01:02:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:04,923 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2022-11-26 01:02:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-26 01:02:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:04,956 INFO L225 Difference]: With dead ends: 1074 [2022-11-26 01:02:04,956 INFO L226 Difference]: Without dead ends: 693 [2022-11-26 01:02:04,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:04,976 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 494 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:04,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1549 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-26 01:02:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2022-11-26 01:02:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2022-11-26 01:02:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2022-11-26 01:02:05,153 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2022-11-26 01:02:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:05,154 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2022-11-26 01:02:05,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 01:02:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2022-11-26 01:02:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 01:02:05,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:05,167 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:05,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:05,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 01:02:05,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash -210879891, now seen corresponding path program 1 times [2022-11-26 01:02:05,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:05,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044836979] [2022-11-26 01:02:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:05,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:05,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044836979] [2022-11-26 01:02:05,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044836979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298606053] [2022-11-26 01:02:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:05,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:05,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:05,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:05,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:02:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:06,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:02:06,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:06,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:06,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298606053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:06,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:06,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:02:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615173276] [2022-11-26 01:02:06,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:06,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:06,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:06,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:06,389 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 01:02:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:06,637 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2022-11-26 01:02:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-26 01:02:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:06,649 INFO L225 Difference]: With dead ends: 1666 [2022-11-26 01:02:06,650 INFO L226 Difference]: Without dead ends: 997 [2022-11-26 01:02:06,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:06,656 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 550 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:06,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1115 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-26 01:02:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2022-11-26 01:02:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2022-11-26 01:02:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2022-11-26 01:02:06,769 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2022-11-26 01:02:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:06,770 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2022-11-26 01:02:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 01:02:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2022-11-26 01:02:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 01:02:06,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:06,776 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:06,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:06,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:06,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash -463813269, now seen corresponding path program 1 times [2022-11-26 01:02:06,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:06,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067831582] [2022-11-26 01:02:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:06,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:07,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:07,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067831582] [2022-11-26 01:02:07,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067831582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:07,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825966518] [2022-11-26 01:02:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:07,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:07,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:07,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:07,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:02:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 01:02:07,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:07,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:07,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825966518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:07,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:07,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 01:02:07,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624489545] [2022-11-26 01:02:07,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:07,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:07,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:07,975 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 01:02:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:08,419 INFO L93 Difference]: Finished difference Result 2778 states and 4510 transitions. [2022-11-26 01:02:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-26 01:02:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:08,432 INFO L225 Difference]: With dead ends: 2778 [2022-11-26 01:02:08,433 INFO L226 Difference]: Without dead ends: 1817 [2022-11-26 01:02:08,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:08,441 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 481 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:08,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1173 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:02:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-26 01:02:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1795. [2022-11-26 01:02:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1216 states have (on average 1.544407894736842) internal successors, (1878), 1306 states have internal predecessors, (1878), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2022-11-26 01:02:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2849 transitions. [2022-11-26 01:02:08,593 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2849 transitions. Word has length 64 [2022-11-26 01:02:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:08,594 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2849 transitions. [2022-11-26 01:02:08,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 01:02:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2849 transitions. [2022-11-26 01:02:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 01:02:08,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:08,604 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:08,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:08,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:08,813 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1317339515, now seen corresponding path program 1 times [2022-11-26 01:02:08,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817779786] [2022-11-26 01:02:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:08,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:09,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817779786] [2022-11-26 01:02:09,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817779786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:09,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674977590] [2022-11-26 01:02:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:09,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:09,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:09,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:09,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:02:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 01:02:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:09,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:09,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674977590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:09,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:09,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-26 01:02:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024391066] [2022-11-26 01:02:09,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:02:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:02:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:02:09,720 INFO L87 Difference]: Start difference. First operand 1795 states and 2849 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:02:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:10,228 INFO L93 Difference]: Finished difference Result 3490 states and 5650 transitions. [2022-11-26 01:02:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:02:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-11-26 01:02:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:10,248 INFO L225 Difference]: With dead ends: 3490 [2022-11-26 01:02:10,249 INFO L226 Difference]: Without dead ends: 2337 [2022-11-26 01:02:10,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:02:10,261 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 139 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:10,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1759 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:02:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2022-11-26 01:02:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2071. [2022-11-26 01:02:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1358 states have (on average 1.5316642120765833) internal successors, (2080), 1487 states have internal predecessors, (2080), 599 states have call successors, (599), 112 states have call predecessors, (599), 113 states have return successors, (646), 582 states have call predecessors, (646), 595 states have call successors, (646) [2022-11-26 01:02:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 3325 transitions. [2022-11-26 01:02:10,458 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 3325 transitions. Word has length 68 [2022-11-26 01:02:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:10,459 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 3325 transitions. [2022-11-26 01:02:10,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:02:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 3325 transitions. [2022-11-26 01:02:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 01:02:10,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:10,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:10,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:10,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1485936470, now seen corresponding path program 1 times [2022-11-26 01:02:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:10,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938035635] [2022-11-26 01:02:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:10,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:02:11,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:11,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938035635] [2022-11-26 01:02:11,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938035635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:11,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057606853] [2022-11-26 01:02:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:11,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:11,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:11,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:11,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:02:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:11,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:02:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:11,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:11,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057606853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:11,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:11,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-26 01:02:11,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41490245] [2022-11-26 01:02:11,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:11,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:02:11,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:02:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:11,863 INFO L87 Difference]: Start difference. First operand 2071 states and 3325 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-26 01:02:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:12,822 INFO L93 Difference]: Finished difference Result 3726 states and 5957 transitions. [2022-11-26 01:02:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:02:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-26 01:02:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:12,842 INFO L225 Difference]: With dead ends: 3726 [2022-11-26 01:02:12,842 INFO L226 Difference]: Without dead ends: 2306 [2022-11-26 01:02:12,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:02:12,856 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 468 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:12,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 2325 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:02:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-11-26 01:02:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2287. [2022-11-26 01:02:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.5163185378590078) internal successors, (2323), 1664 states have internal predecessors, (2323), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2022-11-26 01:02:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3625 transitions. [2022-11-26 01:02:13,024 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3625 transitions. Word has length 72 [2022-11-26 01:02:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:13,027 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3625 transitions. [2022-11-26 01:02:13,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-26 01:02:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3625 transitions. [2022-11-26 01:02:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 01:02:13,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:13,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:13,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:13,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:13,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1163638822, now seen corresponding path program 1 times [2022-11-26 01:02:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:13,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330542510] [2022-11-26 01:02:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:02:13,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:13,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330542510] [2022-11-26 01:02:13,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330542510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:13,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41610374] [2022-11-26 01:02:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:13,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:13,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:13,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:13,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:02:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:02:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:14,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:14,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41610374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:14,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:14,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-26 01:02:14,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076354924] [2022-11-26 01:02:14,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:14,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:02:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:02:14,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:02:14,073 INFO L87 Difference]: Start difference. First operand 2287 states and 3625 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:02:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:14,534 INFO L93 Difference]: Finished difference Result 4310 states and 6908 transitions. [2022-11-26 01:02:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:02:14,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-26 01:02:14,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:14,555 INFO L225 Difference]: With dead ends: 4310 [2022-11-26 01:02:14,555 INFO L226 Difference]: Without dead ends: 2287 [2022-11-26 01:02:14,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:14,573 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 273 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:14,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1552 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-11-26 01:02:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2287. [2022-11-26 01:02:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.481070496083551) internal successors, (2269), 1664 states have internal predecessors, (2269), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2022-11-26 01:02:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3571 transitions. [2022-11-26 01:02:14,793 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3571 transitions. Word has length 73 [2022-11-26 01:02:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:14,794 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3571 transitions. [2022-11-26 01:02:14,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 01:02:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3571 transitions. [2022-11-26 01:02:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 01:02:14,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:14,798 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 01:02:14,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:15,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 01:02:15,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash -84286950, now seen corresponding path program 1 times [2022-11-26 01:02:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309401588] [2022-11-26 01:02:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:15,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:02:15,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309401588] [2022-11-26 01:02:15,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309401588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119406998] [2022-11-26 01:02:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:15,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:15,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:15,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:02:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:15,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:02:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:02:16,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:02:16,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119406998] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:16,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:16,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-26 01:02:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587543720] [2022-11-26 01:02:16,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:16,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:02:16,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:02:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:02:16,491 INFO L87 Difference]: Start difference. First operand 2287 states and 3571 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:02:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:20,944 INFO L93 Difference]: Finished difference Result 5633 states and 9097 transitions. [2022-11-26 01:02:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:02:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-26 01:02:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:20,973 INFO L225 Difference]: With dead ends: 5633 [2022-11-26 01:02:20,973 INFO L226 Difference]: Without dead ends: 4214 [2022-11-26 01:02:20,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-26 01:02:20,988 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 2909 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 1388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2989 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1388 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:20,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2989 Valid, 2849 Invalid, 3917 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1388 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 01:02:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2022-11-26 01:02:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 3559. [2022-11-26 01:02:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2022-11-26 01:02:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2022-11-26 01:02:21,371 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2022-11-26 01:02:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:21,372 INFO L495 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2022-11-26 01:02:21,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 01:02:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2022-11-26 01:02:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 01:02:21,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:21,376 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 01:02:21,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:21,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:02:21,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:21,586 INFO L85 PathProgramCache]: Analyzing trace with hash -874265375, now seen corresponding path program 1 times [2022-11-26 01:02:21,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:21,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935743000] [2022-11-26 01:02:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:21,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:02:21,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935743000] [2022-11-26 01:02:21,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935743000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575441718] [2022-11-26 01:02:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:21,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:21,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:21,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:02:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:02:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:02:22,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:22,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575441718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:22,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:22,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-26 01:02:22,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947926991] [2022-11-26 01:02:22,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:02:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:02:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:02:22,395 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-26 01:02:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:23,396 INFO L93 Difference]: Finished difference Result 7442 states and 11785 transitions. [2022-11-26 01:02:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:02:23,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-11-26 01:02:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:23,431 INFO L225 Difference]: With dead ends: 7442 [2022-11-26 01:02:23,431 INFO L226 Difference]: Without dead ends: 3895 [2022-11-26 01:02:23,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:23,458 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 586 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:23,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1922 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:02:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2022-11-26 01:02:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3513. [2022-11-26 01:02:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2483 states have (on average 1.4800644381796215) internal successors, (3675), 2630 states have internal predecessors, (3675), 809 states have call successors, (809), 204 states have call predecessors, (809), 220 states have return successors, (1073), 774 states have call predecessors, (1073), 804 states have call successors, (1073) [2022-11-26 01:02:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5557 transitions. [2022-11-26 01:02:23,869 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5557 transitions. Word has length 76 [2022-11-26 01:02:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:23,870 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5557 transitions. [2022-11-26 01:02:23,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-26 01:02:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5557 transitions. [2022-11-26 01:02:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 01:02:23,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:23,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:23,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:24,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:24,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1558675849, now seen corresponding path program 1 times [2022-11-26 01:02:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:24,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738896499] [2022-11-26 01:02:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:02:24,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:24,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738896499] [2022-11-26 01:02:24,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738896499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:24,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754987848] [2022-11-26 01:02:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:24,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:24,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:24,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:24,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:02:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:02:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:02:24,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:24,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754987848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:24,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:24,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 01:02:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104272369] [2022-11-26 01:02:24,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:24,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:24,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:24,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:24,776 INFO L87 Difference]: Start difference. First operand 3513 states and 5557 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:02:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:25,283 INFO L93 Difference]: Finished difference Result 7855 states and 12548 transitions. [2022-11-26 01:02:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-26 01:02:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:25,372 INFO L225 Difference]: With dead ends: 7855 [2022-11-26 01:02:25,373 INFO L226 Difference]: Without dead ends: 4354 [2022-11-26 01:02:25,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:02:25,399 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 528 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:25,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-11-26 01:02:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3468. [2022-11-26 01:02:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2598 states have internal predecessors, (3620), 800 states have call successors, (800), 201 states have call predecessors, (800), 214 states have return successors, (1033), 764 states have call predecessors, (1033), 795 states have call successors, (1033) [2022-11-26 01:02:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5453 transitions. [2022-11-26 01:02:25,742 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5453 transitions. Word has length 75 [2022-11-26 01:02:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:25,744 INFO L495 AbstractCegarLoop]: Abstraction has 3468 states and 5453 transitions. [2022-11-26 01:02:25,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:02:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5453 transitions. [2022-11-26 01:02:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 01:02:25,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:25,749 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 01:02:25,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:25,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:25,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:25,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1607611056, now seen corresponding path program 1 times [2022-11-26 01:02:25,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:25,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104812373] [2022-11-26 01:02:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:25,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:02:26,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104812373] [2022-11-26 01:02:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104812373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882705240] [2022-11-26 01:02:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:26,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:26,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:26,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:02:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:02:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:02:26,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:26,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882705240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:26,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:26,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-26 01:02:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954264123] [2022-11-26 01:02:26,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:26,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:02:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:02:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:26,852 INFO L87 Difference]: Start difference. First operand 3468 states and 5453 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-26 01:02:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:27,750 INFO L93 Difference]: Finished difference Result 6364 states and 10040 transitions. [2022-11-26 01:02:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:02:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-26 01:02:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:27,789 INFO L225 Difference]: With dead ends: 6364 [2022-11-26 01:02:27,789 INFO L226 Difference]: Without dead ends: 3489 [2022-11-26 01:02:27,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:02:27,804 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 414 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:27,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2557 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:02:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-11-26 01:02:28,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3472. [2022-11-26 01:02:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2602 states have internal predecessors, (3620), 804 states have call successors, (804), 201 states have call predecessors, (804), 214 states have return successors, (1037), 764 states have call predecessors, (1037), 799 states have call successors, (1037) [2022-11-26 01:02:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 5461 transitions. [2022-11-26 01:02:28,114 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 5461 transitions. Word has length 79 [2022-11-26 01:02:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:28,115 INFO L495 AbstractCegarLoop]: Abstraction has 3472 states and 5461 transitions. [2022-11-26 01:02:28,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-26 01:02:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 5461 transitions. [2022-11-26 01:02:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-26 01:02:28,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:28,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:28,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:28,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:02:28,327 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1380506028, now seen corresponding path program 1 times [2022-11-26 01:02:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975725017] [2022-11-26 01:02:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:28,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:02:28,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:28,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975725017] [2022-11-26 01:02:28,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975725017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:28,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749765824] [2022-11-26 01:02:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:28,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:28,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:28,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:02:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:02:29,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:02:29,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749765824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:29,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:29,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-26 01:02:29,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991211082] [2022-11-26 01:02:29,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:29,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:02:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:02:29,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:29,263 INFO L87 Difference]: Start difference. First operand 3472 states and 5461 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-26 01:02:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:29,704 INFO L93 Difference]: Finished difference Result 6681 states and 10752 transitions. [2022-11-26 01:02:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:02:29,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-26 01:02:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:29,741 INFO L225 Difference]: With dead ends: 6681 [2022-11-26 01:02:29,741 INFO L226 Difference]: Without dead ends: 3663 [2022-11-26 01:02:29,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:29,760 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 13 mSDsluCounter, 1657 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:29,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2220 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2022-11-26 01:02:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3546. [2022-11-26 01:02:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 2503 states have (on average 1.4662405113863364) internal successors, (3670), 2661 states have internal predecessors, (3670), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-26 01:02:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5637 transitions. [2022-11-26 01:02:30,156 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5637 transitions. Word has length 99 [2022-11-26 01:02:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:30,156 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 5637 transitions. [2022-11-26 01:02:30,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-26 01:02:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5637 transitions. [2022-11-26 01:02:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-26 01:02:30,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:30,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:02:30,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:30,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:02:30,374 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 509025896, now seen corresponding path program 1 times [2022-11-26 01:02:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:30,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173604191] [2022-11-26 01:02:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:02:30,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:30,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173604191] [2022-11-26 01:02:30,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173604191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220845050] [2022-11-26 01:02:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:30,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:30,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:30,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:30,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:02:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:02:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:02:31,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:31,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220845050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:31,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:31,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-26 01:02:31,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540685193] [2022-11-26 01:02:31,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:31,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:02:31,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:02:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:02:31,296 INFO L87 Difference]: Start difference. First operand 3546 states and 5637 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-26 01:02:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:35,546 INFO L93 Difference]: Finished difference Result 7879 states and 12725 transitions. [2022-11-26 01:02:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 01:02:35,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-26 01:02:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:35,581 INFO L225 Difference]: With dead ends: 7879 [2022-11-26 01:02:35,581 INFO L226 Difference]: Without dead ends: 4229 [2022-11-26 01:02:35,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-26 01:02:35,601 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1624 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 3724 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 3724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:35,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1657 Valid, 1550 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 3724 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-26 01:02:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-11-26 01:02:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 3541. [2022-11-26 01:02:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2498 states have (on average 1.466773418734988) internal successors, (3664), 2656 states have internal predecessors, (3664), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-26 01:02:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5631 transitions. [2022-11-26 01:02:36,034 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5631 transitions. Word has length 117 [2022-11-26 01:02:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:36,034 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5631 transitions. [2022-11-26 01:02:36,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-26 01:02:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5631 transitions. [2022-11-26 01:02:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-26 01:02:36,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:36,046 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:02:36,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:36,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:36,256 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash 501530342, now seen corresponding path program 1 times [2022-11-26 01:02:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:36,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146197243] [2022-11-26 01:02:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:36,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:02:36,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:36,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146197243] [2022-11-26 01:02:36,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146197243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:36,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114479848] [2022-11-26 01:02:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:36,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:36,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:36,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:02:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:37,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:02:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:02:37,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:37,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114479848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:37,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:37,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 01:02:37,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220475757] [2022-11-26 01:02:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:37,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:37,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:37,288 INFO L87 Difference]: Start difference. First operand 3541 states and 5631 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-26 01:02:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:37,945 INFO L93 Difference]: Finished difference Result 8268 states and 13378 transitions. [2022-11-26 01:02:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-26 01:02:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:37,985 INFO L225 Difference]: With dead ends: 8268 [2022-11-26 01:02:37,985 INFO L226 Difference]: Without dead ends: 4739 [2022-11-26 01:02:38,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:02:38,008 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 466 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:38,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1315 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:02:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-11-26 01:02:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4671. [2022-11-26 01:02:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3305 states have (on average 1.4686838124054462) internal successors, (4854), 3519 states have internal predecessors, (4854), 1055 states have call successors, (1055), 263 states have call predecessors, (1055), 310 states have return successors, (1504), 1020 states have call predecessors, (1504), 1050 states have call successors, (1504) [2022-11-26 01:02:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 7413 transitions. [2022-11-26 01:02:38,541 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 7413 transitions. Word has length 118 [2022-11-26 01:02:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:38,541 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 7413 transitions. [2022-11-26 01:02:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-26 01:02:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 7413 transitions. [2022-11-26 01:02:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 01:02:38,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:38,551 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:02:38,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:38,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 01:02:38,760 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:38,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2077296492, now seen corresponding path program 1 times [2022-11-26 01:02:38,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:38,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244588002] [2022-11-26 01:02:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:38,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:02:39,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:39,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244588002] [2022-11-26 01:02:39,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244588002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:39,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639919948] [2022-11-26 01:02:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:39,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:39,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:39,171 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:39,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:02:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:39,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:02:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:02:39,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:39,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639919948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:39,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:39,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-26 01:02:39,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993196955] [2022-11-26 01:02:39,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:39,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:02:39,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:39,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:02:39,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:02:39,709 INFO L87 Difference]: Start difference. First operand 4671 states and 7413 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-26 01:02:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:41,259 INFO L93 Difference]: Finished difference Result 9373 states and 15236 transitions. [2022-11-26 01:02:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:02:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-26 01:02:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:41,310 INFO L225 Difference]: With dead ends: 9373 [2022-11-26 01:02:41,310 INFO L226 Difference]: Without dead ends: 5565 [2022-11-26 01:02:41,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:02:41,344 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 681 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:41,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1181 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:02:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2022-11-26 01:02:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5449. [2022-11-26 01:02:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5449 states, 3753 states have (on average 1.4628297362110312) internal successors, (5490), 4013 states have internal predecessors, (5490), 1318 states have call successors, (1318), 339 states have call predecessors, (1318), 377 states have return successors, (1814), 1276 states have call predecessors, (1814), 1311 states have call successors, (1814) [2022-11-26 01:02:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5449 states to 5449 states and 8622 transitions. [2022-11-26 01:02:41,948 INFO L78 Accepts]: Start accepts. Automaton has 5449 states and 8622 transitions. Word has length 123 [2022-11-26 01:02:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:41,949 INFO L495 AbstractCegarLoop]: Abstraction has 5449 states and 8622 transitions. [2022-11-26 01:02:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-26 01:02:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5449 states and 8622 transitions. [2022-11-26 01:02:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 01:02:41,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:41,961 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:02:41,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:42,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:42,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1745899087, now seen corresponding path program 1 times [2022-11-26 01:02:42,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:42,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450774542] [2022-11-26 01:02:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:42,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:02:42,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450774542] [2022-11-26 01:02:42,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450774542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:42,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436946677] [2022-11-26 01:02:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:42,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:42,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:42,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:42,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:02:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:02:42,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:02:43,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:43,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436946677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:43,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:43,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-26 01:02:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581005608] [2022-11-26 01:02:43,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:43,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:02:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:43,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:02:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:02:43,054 INFO L87 Difference]: Start difference. First operand 5449 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-26 01:02:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:44,940 INFO L93 Difference]: Finished difference Result 13085 states and 21137 transitions. [2022-11-26 01:02:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:02:44,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-26 01:02:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:45,000 INFO L225 Difference]: With dead ends: 13085 [2022-11-26 01:02:45,001 INFO L226 Difference]: Without dead ends: 8477 [2022-11-26 01:02:45,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:02:45,032 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 555 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:45,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1628 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:02:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2022-11-26 01:02:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 8459. [2022-11-26 01:02:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8459 states, 5713 states have (on average 1.465604761071241) internal successors, (8373), 6147 states have internal predecessors, (8373), 2160 states have call successors, (2160), 545 states have call predecessors, (2160), 585 states have return successors, (2844), 2090 states have call predecessors, (2844), 2149 states have call successors, (2844) [2022-11-26 01:02:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 13377 transitions. [2022-11-26 01:02:46,178 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 13377 transitions. Word has length 124 [2022-11-26 01:02:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:46,179 INFO L495 AbstractCegarLoop]: Abstraction has 8459 states and 13377 transitions. [2022-11-26 01:02:46,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-26 01:02:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 13377 transitions. [2022-11-26 01:02:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 01:02:46,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:46,193 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:02:46,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:46,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:46,401 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1249849006, now seen corresponding path program 1 times [2022-11-26 01:02:46,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:46,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581865648] [2022-11-26 01:02:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:46,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:02:46,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581865648] [2022-11-26 01:02:46,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581865648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828502985] [2022-11-26 01:02:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:46,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:46,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:46,849 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:02:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 01:02:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:02:47,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:47,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828502985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:47,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:47,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-26 01:02:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025243233] [2022-11-26 01:02:47,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:02:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:02:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:02:47,421 INFO L87 Difference]: Start difference. First operand 8459 states and 13377 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-26 01:02:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:49,592 INFO L93 Difference]: Finished difference Result 21090 states and 33776 transitions. [2022-11-26 01:02:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:02:49,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-26 01:02:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:49,697 INFO L225 Difference]: With dead ends: 21090 [2022-11-26 01:02:49,698 INFO L226 Difference]: Without dead ends: 13494 [2022-11-26 01:02:49,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:02:49,751 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 662 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:49,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 4383 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:02:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2022-11-26 01:02:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 12003. [2022-11-26 01:02:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12003 states, 8049 states have (on average 1.4678842092185365) internal successors, (11815), 8678 states have internal predecessors, (11815), 3141 states have call successors, (3141), 759 states have call predecessors, (3141), 812 states have return successors, (4275), 3057 states have call predecessors, (4275), 3124 states have call successors, (4275) [2022-11-26 01:02:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12003 states to 12003 states and 19231 transitions. [2022-11-26 01:02:51,121 INFO L78 Accepts]: Start accepts. Automaton has 12003 states and 19231 transitions. Word has length 125 [2022-11-26 01:02:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:51,122 INFO L495 AbstractCegarLoop]: Abstraction has 12003 states and 19231 transitions. [2022-11-26 01:02:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-26 01:02:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 12003 states and 19231 transitions. [2022-11-26 01:02:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-26 01:02:51,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:51,136 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:02:51,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 01:02:51,345 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash 406811950, now seen corresponding path program 1 times [2022-11-26 01:02:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:51,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100105871] [2022-11-26 01:02:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 01:02:51,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:51,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100105871] [2022-11-26 01:02:51,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100105871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:51,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32798046] [2022-11-26 01:02:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:51,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:51,795 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:51,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 01:02:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:52,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:02:52,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:02:52,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:02:52,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32798046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:52,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984359262] [2022-11-26 01:02:52,753 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-26 01:02:52,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:52,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:52,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:52,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:01,874 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 689 for LOIs [2022-11-26 01:03:50,205 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-11-26 01:03:50,208 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-26 01:03:50,455 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 39 for LOIs [2022-11-26 01:03:50,459 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 452 for LOIs [2022-11-26 01:03:50,657 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 88 for LOIs [2022-11-26 01:03:50,688 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-26 01:03:52,912 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-26 01:03:53,115 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 42 for LOIs [2022-11-26 01:03:53,130 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 33 for LOIs [2022-11-26 01:03:53,134 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-26 01:03:56,655 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:03:57,273 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:03:57,428 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:04:32,899 WARN L233 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:04:40,732 WARN L233 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:04:49,493 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:03,452 WARN L233 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 689 DAG size of output: 620 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:18,564 WARN L233 SmtUtils]: Spent 14.69s on a formula simplification. DAG size of input: 641 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:35,762 WARN L233 SmtUtils]: Spent 16.43s on a formula simplification. DAG size of input: 678 DAG size of output: 625 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:51,689 WARN L233 SmtUtils]: Spent 15.42s on a formula simplification. DAG size of input: 678 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:08,077 WARN L233 SmtUtils]: Spent 15.33s on a formula simplification. DAG size of input: 679 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:25,031 WARN L233 SmtUtils]: Spent 15.73s on a formula simplification. DAG size of input: 690 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:41,034 WARN L233 SmtUtils]: Spent 15.41s on a formula simplification. DAG size of input: 677 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:49,023 WARN L233 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 678 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:16,236 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '251129#(and (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-26 01:07:16,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:07:16,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:07:16,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-26 01:07:16,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328866023] [2022-11-26 01:07:16,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:07:16,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 01:07:16,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 01:07:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 01:07:16,242 INFO L87 Difference]: Start difference. First operand 12003 states and 19231 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-26 01:07:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:43,088 INFO L93 Difference]: Finished difference Result 56628 states and 99380 transitions. [2022-11-26 01:07:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-26 01:07:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2022-11-26 01:07:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:43,449 INFO L225 Difference]: With dead ends: 56628 [2022-11-26 01:07:43,449 INFO L226 Difference]: Without dead ends: 39622 [2022-11-26 01:07:43,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11648 ImplicationChecksByTransitivity, 201.9s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-26 01:07:43,945 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 5535 mSDsluCounter, 7550 mSDsCounter, 0 mSdLazyCounter, 22234 mSolverCounterSat, 3825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5689 SdHoareTripleChecker+Valid, 8369 SdHoareTripleChecker+Invalid, 26059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3825 IncrementalHoareTripleChecker+Valid, 22234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:43,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5689 Valid, 8369 Invalid, 26059 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3825 Valid, 22234 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2022-11-26 01:07:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39622 states. [2022-11-26 01:07:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39622 to 31137. [2022-11-26 01:07:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31137 states, 21057 states have (on average 1.4607493945006411) internal successors, (30759), 22929 states have internal predecessors, (30759), 8077 states have call successors, (8077), 1756 states have call predecessors, (8077), 2002 states have return successors, (13141), 7469 states have call predecessors, (13141), 8049 states have call successors, (13141) [2022-11-26 01:07:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31137 states to 31137 states and 51977 transitions. [2022-11-26 01:07:47,712 INFO L78 Accepts]: Start accepts. Automaton has 31137 states and 51977 transitions. Word has length 127 [2022-11-26 01:07:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:47,713 INFO L495 AbstractCegarLoop]: Abstraction has 31137 states and 51977 transitions. [2022-11-26 01:07:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-26 01:07:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 31137 states and 51977 transitions. [2022-11-26 01:07:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 01:07:47,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:47,736 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:07:47,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 01:07:47,953 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1628437606, now seen corresponding path program 1 times [2022-11-26 01:07:47,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:47,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540131124] [2022-11-26 01:07:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 01:07:49,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540131124] [2022-11-26 01:07:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540131124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526886167] [2022-11-26 01:07:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:49,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:49,022 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:49,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 01:07:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:07:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 01:07:49,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:07:49,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526886167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:07:49,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:07:49,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-26 01:07:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536168139] [2022-11-26 01:07:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:07:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:07:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:07:49,517 INFO L87 Difference]: Start difference. First operand 31137 states and 51977 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-26 01:07:53,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:53,463 INFO L93 Difference]: Finished difference Result 62894 states and 107805 transitions. [2022-11-26 01:07:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:07:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2022-11-26 01:07:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:53,702 INFO L225 Difference]: With dead ends: 62894 [2022-11-26 01:07:53,702 INFO L226 Difference]: Without dead ends: 29088 [2022-11-26 01:07:54,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:07:54,025 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 174 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:54,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1569 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:07:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29088 states. [2022-11-26 01:07:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29088 to 29031. [2022-11-26 01:07:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29031 states, 19311 states have (on average 1.4475169592460255) internal successors, (27953), 21158 states have internal predecessors, (27953), 7790 states have call successors, (7790), 1711 states have call predecessors, (7790), 1929 states have return successors, (12500), 7179 states have call predecessors, (12500), 7762 states have call successors, (12500) [2022-11-26 01:07:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29031 states to 29031 states and 48243 transitions. [2022-11-26 01:07:57,408 INFO L78 Accepts]: Start accepts. Automaton has 29031 states and 48243 transitions. Word has length 136 [2022-11-26 01:07:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:57,409 INFO L495 AbstractCegarLoop]: Abstraction has 29031 states and 48243 transitions. [2022-11-26 01:07:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-26 01:07:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 29031 states and 48243 transitions. [2022-11-26 01:07:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-26 01:07:57,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:57,435 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:07:57,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-26 01:07:57,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:57,644 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash 533944406, now seen corresponding path program 1 times [2022-11-26 01:07:57,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:57,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059458556] [2022-11-26 01:07:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:57,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 01:07:58,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:58,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059458556] [2022-11-26 01:07:58,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059458556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307637860] [2022-11-26 01:07:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:58,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:58,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:58,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 01:07:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:07:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 01:07:59,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:08:00,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307637860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:08:00,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602580442] [2022-11-26 01:08:00,267 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-26 01:08:00,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:08:00,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:08:00,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:08:00,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:04,830 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-26 01:08:10,640 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-11-26 01:08:11,078 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-26 01:08:13,371 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-26 01:08:13,563 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-26 01:08:13,635 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-26 01:08:17,121 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:08:17,750 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:08:17,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:08:54,902 WARN L233 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:03,653 WARN L233 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:13,322 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:28,923 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 585 DAG size of output: 580 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:41,773 WARN L233 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 626 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:49,850 WARN L233 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 624 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:02,125 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:13,726 WARN L233 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 535 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:21,048 WARN L233 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 630 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:28,395 WARN L233 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 630 DAG size of output: 599 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:37,457 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 633 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:44,742 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 633 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:44,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [602580442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:44,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:10:44,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [10, 6, 7] total 42 [2022-11-26 01:10:44,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258225258] [2022-11-26 01:10:44,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:44,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 01:10:44,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 01:10:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 01:10:44,756 INFO L87 Difference]: Start difference. First operand 29031 states and 48243 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-26 01:10:52,485 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 610 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:59,867 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 616 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:06,647 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:19,696 WARN L233 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 596 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:11:32,607 WARN L233 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 602 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:13,118 INFO L93 Difference]: Finished difference Result 58172 states and 96656 transitions. [2022-11-26 01:12:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 01:12:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-11-26 01:12:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:13,388 INFO L225 Difference]: With dead ends: 58172 [2022-11-26 01:12:13,389 INFO L226 Difference]: Without dead ends: 29153 [2022-11-26 01:12:13,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 381 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 192.3s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 01:12:13,835 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 156 mSDsluCounter, 4036 mSDsCounter, 0 mSdLazyCounter, 6001 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 4610 SdHoareTripleChecker+Invalid, 6041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 6001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:13,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 4610 Invalid, 6041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 6001 Invalid, 0 Unknown, 0 Unchecked, 40.3s Time] [2022-11-26 01:12:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29153 states. [2022-11-26 01:12:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29153 to 29074. [2022-11-26 01:12:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29074 states, 19344 states have (on average 1.4469602977667493) internal successors, (27990), 21190 states have internal predecessors, (27990), 7796 states have call successors, (7796), 1716 states have call predecessors, (7796), 1933 states have return successors, (12502), 7185 states have call predecessors, (12502), 7768 states have call successors, (12502) [2022-11-26 01:12:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29074 states to 29074 states and 48288 transitions. [2022-11-26 01:12:16,772 INFO L78 Accepts]: Start accepts. Automaton has 29074 states and 48288 transitions. Word has length 140 [2022-11-26 01:12:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:16,773 INFO L495 AbstractCegarLoop]: Abstraction has 29074 states and 48288 transitions. [2022-11-26 01:12:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-26 01:12:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29074 states and 48288 transitions. [2022-11-26 01:12:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-26 01:12:16,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:16,791 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:16,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:16,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:17,000 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:17,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1486484734, now seen corresponding path program 1 times [2022-11-26 01:12:17,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:17,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668546917] [2022-11-26 01:12:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:17,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-26 01:12:18,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:18,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668546917] [2022-11-26 01:12:18,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668546917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:18,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162351679] [2022-11-26 01:12:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:18,195 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:18,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 01:12:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:18,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:12:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 01:12:18,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:18,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162351679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:18,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:18,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-26 01:12:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566522782] [2022-11-26 01:12:18,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:18,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:12:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:12:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:12:18,942 INFO L87 Difference]: Start difference. First operand 29074 states and 48288 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 01:12:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:23,523 INFO L93 Difference]: Finished difference Result 55838 states and 93299 transitions. [2022-11-26 01:12:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 01:12:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-11-26 01:12:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:23,790 INFO L225 Difference]: With dead ends: 55838 [2022-11-26 01:12:23,790 INFO L226 Difference]: Without dead ends: 28238 [2022-11-26 01:12:24,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-26 01:12:24,338 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 596 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 4134 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:24,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 4134 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 01:12:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28238 states. [2022-11-26 01:12:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28238 to 26621. [2022-11-26 01:12:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26621 states, 17773 states have (on average 1.4464637371293536) internal successors, (25708), 19397 states have internal predecessors, (25708), 6950 states have call successors, (6950), 1687 states have call predecessors, (6950), 1897 states have return successors, (10805), 6462 states have call predecessors, (10805), 6914 states have call successors, (10805) [2022-11-26 01:12:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26621 states to 26621 states and 43463 transitions. [2022-11-26 01:12:27,509 INFO L78 Accepts]: Start accepts. Automaton has 26621 states and 43463 transitions. Word has length 139 [2022-11-26 01:12:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:27,509 INFO L495 AbstractCegarLoop]: Abstraction has 26621 states and 43463 transitions. [2022-11-26 01:12:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 01:12:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 26621 states and 43463 transitions. [2022-11-26 01:12:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 01:12:27,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:27,523 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:12:27,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:27,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:27,733 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash 658543269, now seen corresponding path program 1 times [2022-11-26 01:12:27,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:27,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023778897] [2022-11-26 01:12:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 01:12:28,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:28,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023778897] [2022-11-26 01:12:28,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023778897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778220574] [2022-11-26 01:12:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:28,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:28,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:28,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:28,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4e8e411-89ab-4db8-8479-313eb5771a68/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 01:12:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1952 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:12:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:12:29,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:29,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778220574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:29,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:29,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-26 01:12:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6178487] [2022-11-26 01:12:29,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:29,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:12:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:12:29,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:12:29,478 INFO L87 Difference]: Start difference. First operand 26621 states and 43463 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-26 01:12:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:34,208 INFO L93 Difference]: Finished difference Result 51831 states and 84325 transitions. [2022-11-26 01:12:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:12:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-11-26 01:12:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:34,438 INFO L225 Difference]: With dead ends: 51831 [2022-11-26 01:12:34,439 INFO L226 Difference]: Without dead ends: 26722 [2022-11-26 01:12:34,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-26 01:12:34,658 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 558 mSDsluCounter, 3979 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 4929 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:34,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 4929 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 01:12:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states.