./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba --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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- 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-b5237d8 [2022-11-22 02:09:02,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:09:02,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:09:02,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:09:02,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:09:02,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:09:02,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:09:02,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:09:02,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:09:02,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:09:02,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:09:02,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:09:02,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:09:02,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:09:03,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:09:03,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:09:03,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:09:03,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:09:03,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:09:03,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:09:03,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:09:03,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:09:03,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:09:03,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:09:03,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:09:03,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:09:03,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:09:03,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:09:03,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:09:03,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:09:03,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:09:03,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:09:03,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:09:03,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:09:03,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:09:03,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:09:03,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:09:03,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:09:03,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:09:03,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:09:03,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:09:03,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:09:03,087 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:09:03,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:09:03,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:09:03,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:09:03,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:09:03,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:09:03,090 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:09:03,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:09:03,091 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:09:03,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:09:03,092 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:09:03,092 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:09:03,093 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:09:03,093 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:09:03,093 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:09:03,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:09:03,094 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:09:03,094 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:09:03,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:09:03,096 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:09:03,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:09:03,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:09:03,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:09:03,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:09:03,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:09:03,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:09:03,098 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:09:03,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:09:03,098 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:09:03,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:09:03,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:09:03,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:09:03,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:09:03,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:09:03,100 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:09:03,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:09:03,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:09:03,101 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:09:03,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:09:03,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:09:03,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:09:03,102 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_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2022-11-22 02:09:03,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:09:03,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:09:03,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:09:03,417 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:09:03,417 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:09:03,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2022-11-22 02:09:06,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:09:06,734 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:09:06,737 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2022-11-22 02:09:06,756 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/data/47b18a680/f225a0a95473439ea7e71988a39b1e29/FLAG8e79537cd [2022-11-22 02:09:06,777 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/data/47b18a680/f225a0a95473439ea7e71988a39b1e29 [2022-11-22 02:09:06,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:09:06,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:09:06,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:09:06,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:09:06,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:09:06,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:09:06" (1/1) ... [2022-11-22 02:09:06,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117c14b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:06, skipping insertion in model container [2022-11-22 02:09:06,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:09:06" (1/1) ... [2022-11-22 02:09:06,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:09:06,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:09:07,395 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_edc09692-410f-41ab-9a34-49cad82cc558/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2022-11-22 02:09:07,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:09:07,410 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:09:07,556 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_edc09692-410f-41ab-9a34-49cad82cc558/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2022-11-22 02:09:07,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:09:07,593 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:09:07,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07 WrapperNode [2022-11-22 02:09:07,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:09:07,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:09:07,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:09:07,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:09:07,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,711 INFO L138 Inliner]: procedures = 93, calls = 335, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1088 [2022-11-22 02:09:07,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:09:07,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:09:07,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:09:07,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:09:07,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,783 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:09:07,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:09:07,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:09:07,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:09:07,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (1/1) ... [2022-11-22 02:09:07,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:09:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:07,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:09:07,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:09:07,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:09:07,928 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 02:09:07,928 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 02:09:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:09:07,929 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:09:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 02:09:07,929 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 02:09:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:09:07,929 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:09:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:09:07,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:09:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:09:07,930 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:09:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:09:07,930 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:09:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 02:09:07,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 02:09:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:09:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:09:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:09:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:09:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:09:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:09:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 02:09:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 02:09:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:09:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:09:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:09:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-22 02:09:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:09:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:09:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:09:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:09:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:09:07,932 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:09:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:09:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:09:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-22 02:09:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-22 02:09:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:09:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:09:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:09:07,933 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:09:07,933 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:09:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:09:07,934 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:09:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:09:07,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:09:07,934 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:09:07,934 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:09:08,077 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:09:08,080 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:09:09,277 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:09:10,198 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:09:10,198 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:09:10,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:09:10 BoogieIcfgContainer [2022-11-22 02:09:10,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:09:10,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:09:10,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:09:10,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:09:10,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:09:06" (1/3) ... [2022-11-22 02:09:10,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0dac52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:09:10, skipping insertion in model container [2022-11-22 02:09:10,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:09:07" (2/3) ... [2022-11-22 02:09:10,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0dac52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:09:10, skipping insertion in model container [2022-11-22 02:09:10,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:09:10" (3/3) ... [2022-11-22 02:09:10,215 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2022-11-22 02:09:10,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:09:10,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:09:10,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:09:10,340 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;@266fc197, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:09:10,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:09:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 359 states, 243 states have (on average 1.6008230452674896) internal successors, (389), 264 states have internal predecessors, (389), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-22 02:09:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 02:09:10,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:10,387 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:10,388 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1550258913, now seen corresponding path program 1 times [2022-11-22 02:09:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641911288] [2022-11-22 02:09:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:09:11,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:11,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641911288] [2022-11-22 02:09:11,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641911288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:11,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:11,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:09:11,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200392155] [2022-11-22 02:09:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:11,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:09:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:09:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:09:11,081 INFO L87 Difference]: Start difference. First operand has 359 states, 243 states have (on average 1.6008230452674896) internal successors, (389), 264 states have internal predecessors, (389), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-22 02:09:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:11,309 INFO L93 Difference]: Finished difference Result 377 states and 598 transitions. [2022-11-22 02:09:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:09:11,311 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2022-11-22 02:09:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:11,330 INFO L225 Difference]: With dead ends: 377 [2022-11-22 02:09:11,331 INFO L226 Difference]: Without dead ends: 355 [2022-11-22 02:09:11,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:09:11,343 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:11,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 529 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-22 02:09:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2022-11-22 02:09:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 241 states have (on average 1.5892116182572613) internal successors, (383), 260 states have internal predecessors, (383), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-22 02:09:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 560 transitions. [2022-11-22 02:09:11,434 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 560 transitions. Word has length 77 [2022-11-22 02:09:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:11,436 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 560 transitions. [2022-11-22 02:09:11,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-22 02:09:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 560 transitions. [2022-11-22 02:09:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 02:09:11,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:11,457 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:11,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:09:11,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1261182048, now seen corresponding path program 1 times [2022-11-22 02:09:11,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:11,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418149617] [2022-11-22 02:09:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:09:12,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418149617] [2022-11-22 02:09:12,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418149617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:12,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:12,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:09:12,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346150966] [2022-11-22 02:09:12,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:12,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:09:12,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:09:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:09:12,037 INFO L87 Difference]: Start difference. First operand 355 states and 560 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:09:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:14,540 INFO L93 Difference]: Finished difference Result 1074 states and 1721 transitions. [2022-11-22 02:09:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:09:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2022-11-22 02:09:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:14,548 INFO L225 Difference]: With dead ends: 1074 [2022-11-22 02:09:14,548 INFO L226 Difference]: Without dead ends: 735 [2022-11-22 02:09:14,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:09:14,553 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1099 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:14,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 1370 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 02:09:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-22 02:09:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 697. [2022-11-22 02:09:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 482 states have (on average 1.6016597510373445) internal successors, (772), 515 states have internal predecessors, (772), 172 states have call successors, (172), 42 states have call predecessors, (172), 42 states have return successors, (173), 164 states have call predecessors, (173), 167 states have call successors, (173) [2022-11-22 02:09:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1117 transitions. [2022-11-22 02:09:14,629 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1117 transitions. Word has length 78 [2022-11-22 02:09:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:14,632 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1117 transitions. [2022-11-22 02:09:14,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:09:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1117 transitions. [2022-11-22 02:09:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 02:09:14,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:14,636 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:14,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:09:14,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:14,647 INFO L85 PathProgramCache]: Analyzing trace with hash 356334073, now seen corresponding path program 1 times [2022-11-22 02:09:14,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:14,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621480091] [2022-11-22 02:09:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:14,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:09:14,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:14,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621480091] [2022-11-22 02:09:14,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621480091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:14,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:14,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:09:14,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015751386] [2022-11-22 02:09:14,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:09:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:09:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:14,838 INFO L87 Difference]: Start difference. First operand 697 states and 1117 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:15,045 INFO L93 Difference]: Finished difference Result 2031 states and 3289 transitions. [2022-11-22 02:09:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:09:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 82 [2022-11-22 02:09:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:15,056 INFO L225 Difference]: With dead ends: 2031 [2022-11-22 02:09:15,056 INFO L226 Difference]: Without dead ends: 1350 [2022-11-22 02:09:15,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:15,060 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 527 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:15,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1147 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-22 02:09:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1322. [2022-11-22 02:09:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 934 states have (on average 1.613490364025696) internal successors, (1507), 996 states have internal predecessors, (1507), 310 states have call successors, (310), 75 states have call predecessors, (310), 77 states have return successors, (324), 288 states have call predecessors, (324), 305 states have call successors, (324) [2022-11-22 02:09:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2141 transitions. [2022-11-22 02:09:15,161 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2141 transitions. Word has length 82 [2022-11-22 02:09:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:15,162 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 2141 transitions. [2022-11-22 02:09:15,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2141 transitions. [2022-11-22 02:09:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 02:09:15,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:15,165 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:15,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:09:15,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1838672859, now seen corresponding path program 1 times [2022-11-22 02:09:15,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:15,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784508606] [2022-11-22 02:09:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:15,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:09:15,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:15,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784508606] [2022-11-22 02:09:15,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784508606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:15,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:15,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:09:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585254646] [2022-11-22 02:09:15,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:15,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:09:15,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:09:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:15,317 INFO L87 Difference]: Start difference. First operand 1322 states and 2141 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:15,642 INFO L93 Difference]: Finished difference Result 3907 states and 6386 transitions. [2022-11-22 02:09:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:09:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 83 [2022-11-22 02:09:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:15,673 INFO L225 Difference]: With dead ends: 3907 [2022-11-22 02:09:15,674 INFO L226 Difference]: Without dead ends: 2602 [2022-11-22 02:09:15,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:15,695 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 526 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:15,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1153 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2022-11-22 02:09:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2573. [2022-11-22 02:09:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 1839 states have (on average 1.6182707993474714) internal successors, (2976), 1959 states have internal predecessors, (2976), 586 states have call successors, (586), 141 states have call predecessors, (586), 147 states have return successors, (642), 536 states have call predecessors, (642), 581 states have call successors, (642) [2022-11-22 02:09:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4204 transitions. [2022-11-22 02:09:15,910 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4204 transitions. Word has length 83 [2022-11-22 02:09:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:15,911 INFO L495 AbstractCegarLoop]: Abstraction has 2573 states and 4204 transitions. [2022-11-22 02:09:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4204 transitions. [2022-11-22 02:09:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 02:09:15,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:15,917 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:15,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:09:15,918 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1164407109, now seen corresponding path program 1 times [2022-11-22 02:09:15,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:15,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15883419] [2022-11-22 02:09:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:09:16,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15883419] [2022-11-22 02:09:16,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15883419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:16,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:16,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:09:16,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620869693] [2022-11-22 02:09:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:16,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:09:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:16,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:09:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:16,100 INFO L87 Difference]: Start difference. First operand 2573 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:16,524 INFO L93 Difference]: Finished difference Result 7660 states and 12658 transitions. [2022-11-22 02:09:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:09:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 84 [2022-11-22 02:09:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:16,568 INFO L225 Difference]: With dead ends: 7660 [2022-11-22 02:09:16,568 INFO L226 Difference]: Without dead ends: 5106 [2022-11-22 02:09:16,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:16,586 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 525 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:16,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1159 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5106 states. [2022-11-22 02:09:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5106 to 5076. [2022-11-22 02:09:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 3650 states have (on average 1.6191780821917807) internal successors, (5910), 3886 states have internal predecessors, (5910), 1138 states have call successors, (1138), 273 states have call predecessors, (1138), 287 states have return successors, (1338), 1032 states have call predecessors, (1338), 1133 states have call successors, (1338) [2022-11-22 02:09:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 8386 transitions. [2022-11-22 02:09:16,980 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 8386 transitions. Word has length 84 [2022-11-22 02:09:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:16,980 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 8386 transitions. [2022-11-22 02:09:16,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 8386 transitions. [2022-11-22 02:09:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 02:09:16,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:16,984 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:16,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:09:16,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1737001433, now seen corresponding path program 1 times [2022-11-22 02:09:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:16,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565442550] [2022-11-22 02:09:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:16,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:09:17,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:17,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565442550] [2022-11-22 02:09:17,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565442550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:17,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:17,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:09:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927477797] [2022-11-22 02:09:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:09:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:09:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:17,104 INFO L87 Difference]: Start difference. First operand 5076 states and 8386 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:17,865 INFO L93 Difference]: Finished difference Result 15167 states and 25499 transitions. [2022-11-22 02:09:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:09:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 85 [2022-11-22 02:09:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:17,949 INFO L225 Difference]: With dead ends: 15167 [2022-11-22 02:09:17,949 INFO L226 Difference]: Without dead ends: 10114 [2022-11-22 02:09:17,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:17,978 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 524 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:17,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1165 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2022-11-22 02:09:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 10083. [2022-11-22 02:09:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10083 states, 7273 states have (on average 1.6180393235253678) internal successors, (11768), 7741 states have internal predecessors, (11768), 2242 states have call successors, (2242), 537 states have call predecessors, (2242), 567 states have return successors, (2958), 2024 states have call predecessors, (2958), 2237 states have call successors, (2958) [2022-11-22 02:09:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10083 states to 10083 states and 16968 transitions. [2022-11-22 02:09:18,777 INFO L78 Accepts]: Start accepts. Automaton has 10083 states and 16968 transitions. Word has length 85 [2022-11-22 02:09:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:18,778 INFO L495 AbstractCegarLoop]: Abstraction has 10083 states and 16968 transitions. [2022-11-22 02:09:18,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10083 states and 16968 transitions. [2022-11-22 02:09:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 02:09:18,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:18,783 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:18,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:09:18,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1987414909, now seen corresponding path program 1 times [2022-11-22 02:09:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024334588] [2022-11-22 02:09:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:09:19,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:19,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024334588] [2022-11-22 02:09:19,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024334588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:19,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:19,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:09:19,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830525507] [2022-11-22 02:09:19,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:19,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:09:19,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:19,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:09:19,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:19,040 INFO L87 Difference]: Start difference. First operand 10083 states and 16968 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:19,690 INFO L93 Difference]: Finished difference Result 10741 states and 18117 transitions. [2022-11-22 02:09:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:09:19,694 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), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 86 [2022-11-22 02:09:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:19,785 INFO L225 Difference]: With dead ends: 10741 [2022-11-22 02:09:19,785 INFO L226 Difference]: Without dead ends: 10730 [2022-11-22 02:09:19,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:09:19,794 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 510 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:19,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1163 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2022-11-22 02:09:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 10704. [2022-11-22 02:09:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10704 states, 7722 states have (on average 1.6168091168091168) internal successors, (12485), 8219 states have internal predecessors, (12485), 2380 states have call successors, (2380), 570 states have call predecessors, (2380), 601 states have return successors, (3198), 2147 states have call predecessors, (3198), 2375 states have call successors, (3198) [2022-11-22 02:09:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10704 states to 10704 states and 18063 transitions. [2022-11-22 02:09:20,634 INFO L78 Accepts]: Start accepts. Automaton has 10704 states and 18063 transitions. Word has length 86 [2022-11-22 02:09:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:20,634 INFO L495 AbstractCegarLoop]: Abstraction has 10704 states and 18063 transitions. [2022-11-22 02:09:20,635 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), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:09:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 10704 states and 18063 transitions. [2022-11-22 02:09:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-22 02:09:20,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:20,641 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-22 02:09:20,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:09:20,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash -710694472, now seen corresponding path program 1 times [2022-11-22 02:09:20,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:20,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398045568] [2022-11-22 02:09:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:20,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 02:09:20,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:20,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398045568] [2022-11-22 02:09:20,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398045568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:20,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:09:20,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:09:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590272660] [2022-11-22 02:09:20,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:20,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:09:20,916 INFO L87 Difference]: Start difference. First operand 10704 states and 18063 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 02:09:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:21,683 INFO L93 Difference]: Finished difference Result 22785 states and 39300 transitions. [2022-11-22 02:09:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 131 [2022-11-22 02:09:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:21,848 INFO L225 Difference]: With dead ends: 22785 [2022-11-22 02:09:21,848 INFO L226 Difference]: Without dead ends: 12098 [2022-11-22 02:09:21,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:09:21,897 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 76 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:21,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1622 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:09:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12098 states. [2022-11-22 02:09:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12098 to 11060. [2022-11-22 02:09:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11060 states, 8030 states have (on average 1.6090909090909091) internal successors, (12921), 8527 states have internal predecessors, (12921), 2412 states have call successors, (2412), 570 states have call predecessors, (2412), 617 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-11-22 02:09:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11060 states to 11060 states and 18644 transitions. [2022-11-22 02:09:22,742 INFO L78 Accepts]: Start accepts. Automaton has 11060 states and 18644 transitions. Word has length 131 [2022-11-22 02:09:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:22,743 INFO L495 AbstractCegarLoop]: Abstraction has 11060 states and 18644 transitions. [2022-11-22 02:09:22,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-22 02:09:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 11060 states and 18644 transitions. [2022-11-22 02:09:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 02:09:22,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:22,750 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-22 02:09:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:09:22,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash -500342734, now seen corresponding path program 1 times [2022-11-22 02:09:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:22,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098300035] [2022-11-22 02:09:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 02:09:23,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098300035] [2022-11-22 02:09:23,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098300035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:23,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240539269] [2022-11-22 02:09:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:23,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:23,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:23,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:23,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:09:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:23,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:09:23,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:09:23,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:23,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240539269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:23,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:23,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:09:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009608520] [2022-11-22 02:09:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:23,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:23,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:09:23,588 INFO L87 Difference]: Start difference. First operand 11060 states and 18644 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:24,715 INFO L93 Difference]: Finished difference Result 23429 states and 40500 transitions. [2022-11-22 02:09:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 134 [2022-11-22 02:09:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:24,803 INFO L225 Difference]: With dead ends: 23429 [2022-11-22 02:09:24,803 INFO L226 Difference]: Without dead ends: 12386 [2022-11-22 02:09:24,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:09:24,851 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 213 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:24,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1356 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:09:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12386 states. [2022-11-22 02:09:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12386 to 12386. [2022-11-22 02:09:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12386 states, 9322 states have (on average 1.6523278266466424) internal successors, (15403), 9819 states have internal predecessors, (15403), 2412 states have call successors, (2412), 604 states have call predecessors, (2412), 651 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-11-22 02:09:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12386 states to 12386 states and 21126 transitions. [2022-11-22 02:09:25,752 INFO L78 Accepts]: Start accepts. Automaton has 12386 states and 21126 transitions. Word has length 134 [2022-11-22 02:09:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:25,753 INFO L495 AbstractCegarLoop]: Abstraction has 12386 states and 21126 transitions. [2022-11-22 02:09:25,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 12386 states and 21126 transitions. [2022-11-22 02:09:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-22 02:09:25,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:25,761 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-11-22 02:09:25,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:25,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:25,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2073062925, now seen corresponding path program 1 times [2022-11-22 02:09:25,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:25,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673361949] [2022-11-22 02:09:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:25,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 02:09:26,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673361949] [2022-11-22 02:09:26,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673361949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152094508] [2022-11-22 02:09:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:26,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:26,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:26,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:26,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:09:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:26,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:09:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-22 02:09:26,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:26,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152094508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:26,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:26,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:09:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488805235] [2022-11-22 02:09:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:26,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:09:26,665 INFO L87 Difference]: Start difference. First operand 12386 states and 21126 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:27,563 INFO L93 Difference]: Finished difference Result 26081 states and 45430 transitions. [2022-11-22 02:09:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 139 [2022-11-22 02:09:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:27,634 INFO L225 Difference]: With dead ends: 26081 [2022-11-22 02:09:27,635 INFO L226 Difference]: Without dead ends: 13712 [2022-11-22 02:09:27,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:09:27,676 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 211 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:27,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1356 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:09:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2022-11-22 02:09:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 13712. [2022-11-22 02:09:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13712 states, 10614 states have (on average 1.6850386282268701) internal successors, (17885), 11111 states have internal predecessors, (17885), 2412 states have call successors, (2412), 638 states have call predecessors, (2412), 685 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-11-22 02:09:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13712 states to 13712 states and 23608 transitions. [2022-11-22 02:09:28,622 INFO L78 Accepts]: Start accepts. Automaton has 13712 states and 23608 transitions. Word has length 139 [2022-11-22 02:09:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:28,623 INFO L495 AbstractCegarLoop]: Abstraction has 13712 states and 23608 transitions. [2022-11-22 02:09:28,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 13712 states and 23608 transitions. [2022-11-22 02:09:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:09:28,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:28,630 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-22 02:09:28,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:28,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:28,838 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:28,839 INFO L85 PathProgramCache]: Analyzing trace with hash -702433199, now seen corresponding path program 1 times [2022-11-22 02:09:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:28,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073006308] [2022-11-22 02:09:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:28,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 02:09:31,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:31,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073006308] [2022-11-22 02:09:31,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073006308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:31,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329747741] [2022-11-22 02:09:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:31,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:31,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:31,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:09:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:09:31,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:09:31,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:31,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329747741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:31,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:31,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-11-22 02:09:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224701935] [2022-11-22 02:09:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:09:31,678 INFO L87 Difference]: Start difference. First operand 13712 states and 23608 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:32,632 INFO L93 Difference]: Finished difference Result 28733 states and 50360 transitions. [2022-11-22 02:09:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:32,633 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), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 143 [2022-11-22 02:09:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:32,730 INFO L225 Difference]: With dead ends: 28733 [2022-11-22 02:09:32,731 INFO L226 Difference]: Without dead ends: 15038 [2022-11-22 02:09:32,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:09:32,790 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 209 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:32,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1356 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:09:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15038 states. [2022-11-22 02:09:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15038 to 15038. [2022-11-22 02:09:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15038 states, 11906 states have (on average 1.7106500923903913) internal successors, (20367), 12403 states have internal predecessors, (20367), 2412 states have call successors, (2412), 672 states have call predecessors, (2412), 719 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-11-22 02:09:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15038 states to 15038 states and 26090 transitions. [2022-11-22 02:09:33,808 INFO L78 Accepts]: Start accepts. Automaton has 15038 states and 26090 transitions. Word has length 143 [2022-11-22 02:09:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:33,811 INFO L495 AbstractCegarLoop]: Abstraction has 15038 states and 26090 transitions. [2022-11-22 02:09:33,811 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), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 15038 states and 26090 transitions. [2022-11-22 02:09:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-22 02:09:33,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:33,819 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:33,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:34,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:09:34,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1123739644, now seen corresponding path program 1 times [2022-11-22 02:09:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116064229] [2022-11-22 02:09:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:34,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:09:36,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:36,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116064229] [2022-11-22 02:09:36,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116064229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:36,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984990646] [2022-11-22 02:09:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:36,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:36,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:36,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:09:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:09:36,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:09:36,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:36,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984990646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:36,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:36,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-11-22 02:09:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81690467] [2022-11-22 02:09:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:36,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:36,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:09:36,641 INFO L87 Difference]: Start difference. First operand 15038 states and 26090 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:37,473 INFO L93 Difference]: Finished difference Result 31385 states and 55290 transitions. [2022-11-22 02:09:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-11-22 02:09:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:37,551 INFO L225 Difference]: With dead ends: 31385 [2022-11-22 02:09:37,552 INFO L226 Difference]: Without dead ends: 16364 [2022-11-22 02:09:37,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:09:37,596 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 207 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:37,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1356 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:09:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16364 states. [2022-11-22 02:09:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16364 to 16364. [2022-11-22 02:09:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16364 states, 13198 states have (on average 1.731247158660403) internal successors, (22849), 13695 states have internal predecessors, (22849), 2412 states have call successors, (2412), 706 states have call predecessors, (2412), 753 states have return successors, (3311), 2179 states have call predecessors, (3311), 2407 states have call successors, (3311) [2022-11-22 02:09:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16364 states to 16364 states and 28572 transitions. [2022-11-22 02:09:38,496 INFO L78 Accepts]: Start accepts. Automaton has 16364 states and 28572 transitions. Word has length 146 [2022-11-22 02:09:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:38,497 INFO L495 AbstractCegarLoop]: Abstraction has 16364 states and 28572 transitions. [2022-11-22 02:09:38,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 16364 states and 28572 transitions. [2022-11-22 02:09:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-22 02:09:38,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:38,503 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:38,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:38,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:09:38,711 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash 571862134, now seen corresponding path program 1 times [2022-11-22 02:09:38,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:38,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422360769] [2022-11-22 02:09:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:38,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 02:09:40,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422360769] [2022-11-22 02:09:40,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422360769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480118226] [2022-11-22 02:09:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:40,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:40,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:40,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:09:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:09:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 02:09:41,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:41,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480118226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:41,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:41,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-11-22 02:09:41,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081650867] [2022-11-22 02:09:41,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:09:41,353 INFO L87 Difference]: Start difference. First operand 16364 states and 28572 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:42,171 INFO L93 Difference]: Finished difference Result 33926 states and 59253 transitions. [2022-11-22 02:09:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:09:42,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 148 [2022-11-22 02:09:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:42,287 INFO L225 Difference]: With dead ends: 33926 [2022-11-22 02:09:42,288 INFO L226 Difference]: Without dead ends: 17594 [2022-11-22 02:09:42,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:09:42,351 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 309 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:42,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1476 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17594 states. [2022-11-22 02:09:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17594 to 17406. [2022-11-22 02:09:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17406 states, 13844 states have (on average 1.710849465472407) internal successors, (23685), 14360 states have internal predecessors, (23685), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-11-22 02:09:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17406 states to 17406 states and 30377 transitions. [2022-11-22 02:09:43,319 INFO L78 Accepts]: Start accepts. Automaton has 17406 states and 30377 transitions. Word has length 148 [2022-11-22 02:09:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:43,320 INFO L495 AbstractCegarLoop]: Abstraction has 17406 states and 30377 transitions. [2022-11-22 02:09:43,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:09:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 17406 states and 30377 transitions. [2022-11-22 02:09:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-22 02:09:43,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:43,329 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:43,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 02:09:43,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:09:43,538 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1331707507, now seen corresponding path program 1 times [2022-11-22 02:09:43,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:43,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578860088] [2022-11-22 02:09:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:43,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 02:09:45,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578860088] [2022-11-22 02:09:45,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578860088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235710782] [2022-11-22 02:09:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:45,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:45,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:45,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:09:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:09:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 02:09:45,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:45,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235710782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:45,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:45,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 25 [2022-11-22 02:09:45,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717065700] [2022-11-22 02:09:45,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:45,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:09:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:09:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:09:45,819 INFO L87 Difference]: Start difference. First operand 17406 states and 30377 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-22 02:09:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:46,877 INFO L93 Difference]: Finished difference Result 18043 states and 31736 transitions. [2022-11-22 02:09:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 151 [2022-11-22 02:09:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:46,980 INFO L225 Difference]: With dead ends: 18043 [2022-11-22 02:09:46,981 INFO L226 Difference]: Without dead ends: 17957 [2022-11-22 02:09:46,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:09:46,996 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 540 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:46,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 870 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:09:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17957 states. [2022-11-22 02:09:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17957 to 17438. [2022-11-22 02:09:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17438 states, 13876 states have (on average 1.7092101470164311) internal successors, (23717), 14392 states have internal predecessors, (23717), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-11-22 02:09:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17438 states to 17438 states and 30409 transitions. [2022-11-22 02:09:47,980 INFO L78 Accepts]: Start accepts. Automaton has 17438 states and 30409 transitions. Word has length 151 [2022-11-22 02:09:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:47,981 INFO L495 AbstractCegarLoop]: Abstraction has 17438 states and 30409 transitions. [2022-11-22 02:09:47,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-22 02:09:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 17438 states and 30409 transitions. [2022-11-22 02:09:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-22 02:09:47,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:47,988 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:48,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:09:48,197 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1712507911, now seen corresponding path program 1 times [2022-11-22 02:09:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:48,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799559191] [2022-11-22 02:09:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:48,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 02:09:49,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799559191] [2022-11-22 02:09:49,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799559191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436347011] [2022-11-22 02:09:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:49,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:49,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:49,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:49,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:09:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:09:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 02:09:50,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:50,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436347011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:50,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:50,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22] total 25 [2022-11-22 02:09:50,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383945501] [2022-11-22 02:09:50,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:50,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:09:50,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:09:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:09:50,267 INFO L87 Difference]: Start difference. First operand 17438 states and 30409 transitions. Second operand has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2022-11-22 02:09:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:50,855 INFO L93 Difference]: Finished difference Result 17564 states and 30567 transitions. [2022-11-22 02:09:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:09:50,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) Word has length 156 [2022-11-22 02:09:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:50,949 INFO L225 Difference]: With dead ends: 17564 [2022-11-22 02:09:50,949 INFO L226 Difference]: Without dead ends: 17478 [2022-11-22 02:09:50,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:09:50,961 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 30 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:50,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2074 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2022-11-22 02:09:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 17438. [2022-11-22 02:09:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17438 states, 13876 states have (on average 1.7057509368694148) internal successors, (23669), 14392 states have internal predecessors, (23669), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-11-22 02:09:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17438 states to 17438 states and 30361 transitions. [2022-11-22 02:09:51,652 INFO L78 Accepts]: Start accepts. Automaton has 17438 states and 30361 transitions. Word has length 156 [2022-11-22 02:09:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:51,652 INFO L495 AbstractCegarLoop]: Abstraction has 17438 states and 30361 transitions. [2022-11-22 02:09:51,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2022-11-22 02:09:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17438 states and 30361 transitions. [2022-11-22 02:09:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-22 02:09:51,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:51,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:51,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:51,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:09:51,870 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:51,871 INFO L85 PathProgramCache]: Analyzing trace with hash -729402614, now seen corresponding path program 1 times [2022-11-22 02:09:51,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:51,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414922961] [2022-11-22 02:09:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:51,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-22 02:09:53,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414922961] [2022-11-22 02:09:53,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414922961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743318578] [2022-11-22 02:09:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:53,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:53,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:53,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:09:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:09:54,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-22 02:09:54,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:09:54,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743318578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:09:54,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:09:54,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-11-22 02:09:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225792305] [2022-11-22 02:09:54,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:09:54,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:09:54,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:09:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:09:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:09:54,060 INFO L87 Difference]: Start difference. First operand 17438 states and 30361 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-11-22 02:09:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:55,028 INFO L93 Difference]: Finished difference Result 18465 states and 33161 transitions. [2022-11-22 02:09:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:09:55,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 163 [2022-11-22 02:09:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:55,121 INFO L225 Difference]: With dead ends: 18465 [2022-11-22 02:09:55,121 INFO L226 Difference]: Without dead ends: 18379 [2022-11-22 02:09:55,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:09:55,135 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 44 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:55,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1632 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:09:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18379 states. [2022-11-22 02:09:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18379 to 17534. [2022-11-22 02:09:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 13972 states have (on average 1.7009018036072143) internal successors, (23765), 14488 states have internal predecessors, (23765), 2652 states have call successors, (2652), 876 states have call predecessors, (2652), 909 states have return successors, (4040), 2385 states have call predecessors, (4040), 2647 states have call successors, (4040) [2022-11-22 02:09:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 30457 transitions. [2022-11-22 02:09:56,174 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 30457 transitions. Word has length 163 [2022-11-22 02:09:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:56,175 INFO L495 AbstractCegarLoop]: Abstraction has 17534 states and 30457 transitions. [2022-11-22 02:09:56,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-11-22 02:09:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 30457 transitions. [2022-11-22 02:09:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-22 02:09:56,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:56,187 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:56,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:56,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:09:56,396 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:09:56,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:56,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1410163550, now seen corresponding path program 1 times [2022-11-22 02:09:56,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:09:56,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140750347] [2022-11-22 02:09:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:56,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:09:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-22 02:09:58,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:09:58,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140750347] [2022-11-22 02:09:58,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140750347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:09:58,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718820928] [2022-11-22 02:09:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:58,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:58,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:58,054 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:58,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc09692-410f-41ab-9a34-49cad82cc558/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:09:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:58,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 02:09:58,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-22 02:09:59,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:02,501 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-22 02:10:10,397 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-22 02:10:10,597 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-11-22 02:13:38,318 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-11-22 02:13:38,847 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-22 02:13:48,183 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.