./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.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_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/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_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/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_aa637f30-cc50-46a9-aa77-2c2f46793fdd/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 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- 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 01:58:10,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:58:10,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:58:10,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:58:10,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:58:11,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:58:11,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:58:11,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:58:11,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:58:11,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:58:11,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:58:11,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:58:11,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:58:11,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:58:11,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:58:11,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:58:11,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:58:11,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:58:11,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:58:11,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:58:11,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:58:11,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:58:11,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:58:11,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:58:11,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:58:11,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:58:11,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:58:11,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:58:11,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:58:11,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:58:11,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:58:11,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:58:11,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:58:11,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:58:11,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:58:11,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:58:11,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:58:11,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:58:11,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:58:11,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:58:11,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:58:11,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:58:11,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:58:11,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:58:11,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:58:11,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:58:11,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:58:11,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:58:11,101 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:58:11,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:58:11,101 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:58:11,101 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:58:11,101 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:58:11,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:58:11,102 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:58:11,102 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:58:11,102 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:58:11,102 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:58:11,103 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:58:11,103 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:58:11,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:58:11,103 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:58:11,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:58:11,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:58:11,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:58:11,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:58:11,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:58:11,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:58:11,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:58:11,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:58:11,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:58:11,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:58:11,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:58:11,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:58:11,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:58:11,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:58:11,106 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:58:11,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:58:11,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:58:11,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:58:11,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:58:11,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:58:11,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:58:11,107 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_aa637f30-cc50-46a9-aa77-2c2f46793fdd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2022-11-22 01:58:11,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:58:11,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:58:11,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:58:11,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:58:11,371 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:58:11,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2022-11-22 01:58:14,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:58:14,722 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:58:14,728 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2022-11-22 01:58:14,756 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/data/cef75a1fa/24692fcc7c3e4f9eb4068da275e47906/FLAG297893490 [2022-11-22 01:58:14,774 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/data/cef75a1fa/24692fcc7c3e4f9eb4068da275e47906 [2022-11-22 01:58:14,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:58:14,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:58:14,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:58:14,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:58:14,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:58:14,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:58:14" (1/1) ... [2022-11-22 01:58:14,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d02d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:14, skipping insertion in model container [2022-11-22 01:58:14,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:58:14" (1/1) ... [2022-11-22 01:58:14,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:58:14,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:58:15,077 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_aa637f30-cc50-46a9-aa77-2c2f46793fdd/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2022-11-22 01:58:15,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:58:15,441 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:58:15,498 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_aa637f30-cc50-46a9-aa77-2c2f46793fdd/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2022-11-22 01:58:15,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:58:15,665 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:58:15,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15 WrapperNode [2022-11-22 01:58:15,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:58:15,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:58:15,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:58:15,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:58:15,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,781 INFO L138 Inliner]: procedures = 99, calls = 352, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 934 [2022-11-22 01:58:15,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:58:15,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:58:15,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:58:15,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:58:15,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:58:15,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:58:15,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:58:15,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:58:15,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (1/1) ... [2022-11-22 01:58:15,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:58:15,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:15,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:58:15,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:58:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 01:58:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 01:58:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:58:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:58:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:58:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:58:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 01:58:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 01:58:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:58:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:58:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:58:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:58:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:58:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:58:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 01:58:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 01:58:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 01:58:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 01:58:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:58:15,982 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:58:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:58:15,983 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:58:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:58:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-22 01:58:15,984 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-22 01:58:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:58:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:58:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 01:58:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 01:58:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:58:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:58:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:58:15,986 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:58:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 01:58:15,986 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 01:58:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:58:15,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:58:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:58:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:58:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:58:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:58:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:58:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:58:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:58:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:58:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:58:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:58:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:58:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:58:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-22 01:58:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-22 01:58:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:58:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:58:15,990 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:58:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:58:15,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:58:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:58:15,991 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:58:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-22 01:58:15,991 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-22 01:58:16,225 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:58:16,227 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:58:17,610 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:58:18,462 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:58:18,463 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:58:18,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:58:18 BoogieIcfgContainer [2022-11-22 01:58:18,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:58:18,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:58:18,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:58:18,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:58:18,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:58:14" (1/3) ... [2022-11-22 01:58:18,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4065e4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:58:18, skipping insertion in model container [2022-11-22 01:58:18,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:15" (2/3) ... [2022-11-22 01:58:18,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4065e4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:58:18, skipping insertion in model container [2022-11-22 01:58:18,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:58:18" (3/3) ... [2022-11-22 01:58:18,480 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product32.cil.c [2022-11-22 01:58:18,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:58:18,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:58:18,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:58:18,614 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;@1c6a374b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:58:18,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:58:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 401 states, 268 states have (on average 1.5671641791044777) internal successors, (420), 291 states have internal predecessors, (420), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) [2022-11-22 01:58:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 01:58:18,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:18,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:18,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:18,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1796047711, now seen corresponding path program 1 times [2022-11-22 01:58:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:18,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414197633] [2022-11-22 01:58:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:18,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:19,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:19,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414197633] [2022-11-22 01:58:19,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414197633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:19,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:19,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:58:19,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086092296] [2022-11-22 01:58:19,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:19,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:58:19,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:58:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:58:19,119 INFO L87 Difference]: Start difference. First operand has 401 states, 268 states have (on average 1.5671641791044777) internal successors, (420), 291 states have internal predecessors, (420), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 01:58:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:19,265 INFO L93 Difference]: Finished difference Result 419 states and 653 transitions. [2022-11-22 01:58:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:58:19,268 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-11-22 01:58:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:19,283 INFO L225 Difference]: With dead ends: 419 [2022-11-22 01:58:19,284 INFO L226 Difference]: Without dead ends: 397 [2022-11-22 01:58:19,287 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 01:58:19,290 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:19,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 579 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-22 01:58:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2022-11-22 01:58:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 266 states have (on average 1.556390977443609) internal successors, (414), 287 states have internal predecessors, (414), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-22 01:58:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 615 transitions. [2022-11-22 01:58:19,387 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 615 transitions. Word has length 43 [2022-11-22 01:58:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:19,389 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 615 transitions. [2022-11-22 01:58:19,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 01:58:19,390 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 615 transitions. [2022-11-22 01:58:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:58:19,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:19,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:19,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:58:19,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:19,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:19,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1427098797, now seen corresponding path program 1 times [2022-11-22 01:58:19,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:19,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040650365] [2022-11-22 01:58:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:19,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:20,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:20,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040650365] [2022-11-22 01:58:20,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040650365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:20,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:20,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:58:20,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845044363] [2022-11-22 01:58:20,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:58:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:58:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:58:20,030 INFO L87 Difference]: Start difference. First operand 397 states and 615 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 01:58:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:22,446 INFO L93 Difference]: Finished difference Result 1279 states and 2019 transitions. [2022-11-22 01:58:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:58:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-22 01:58:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:22,461 INFO L225 Difference]: With dead ends: 1279 [2022-11-22 01:58:22,461 INFO L226 Difference]: Without dead ends: 898 [2022-11-22 01:58:22,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:58:22,475 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 2032 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:22,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2103 Valid, 781 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 01:58:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-22 01:58:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 801. [2022-11-22 01:58:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 556 states have (on average 1.5719424460431655) internal successors, (874), 586 states have internal predecessors, (874), 193 states have call successors, (193), 50 states have call predecessors, (193), 51 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2022-11-22 01:58:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1262 transitions. [2022-11-22 01:58:22,585 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1262 transitions. Word has length 44 [2022-11-22 01:58:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:22,586 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1262 transitions. [2022-11-22 01:58:22,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 01:58:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1262 transitions. [2022-11-22 01:58:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 01:58:22,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:22,594 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:22,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:58:22,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 442798330, now seen corresponding path program 1 times [2022-11-22 01:58:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:22,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504473115] [2022-11-22 01:58:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:23,168 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 01:58:23,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:23,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504473115] [2022-11-22 01:58:23,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504473115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:23,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:23,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:58:23,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28849193] [2022-11-22 01:58:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:23,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:58:23,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:58:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:58:23,171 INFO L87 Difference]: Start difference. First operand 801 states and 1262 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:58:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:26,901 INFO L93 Difference]: Finished difference Result 2744 states and 4355 transitions. [2022-11-22 01:58:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:58:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 87 [2022-11-22 01:58:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:26,916 INFO L225 Difference]: With dead ends: 2744 [2022-11-22 01:58:26,917 INFO L226 Difference]: Without dead ends: 1959 [2022-11-22 01:58:26,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:58:26,923 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1356 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 5355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:26,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1962 Invalid, 5355 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [680 Valid, 4675 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 01:58:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-11-22 01:58:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1806. [2022-11-22 01:58:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1219 states have (on average 1.542247744052502) internal successors, (1880), 1291 states have internal predecessors, (1880), 477 states have call successors, (477), 97 states have call predecessors, (477), 109 states have return successors, (496), 450 states have call predecessors, (496), 472 states have call successors, (496) [2022-11-22 01:58:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2853 transitions. [2022-11-22 01:58:27,105 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2853 transitions. Word has length 87 [2022-11-22 01:58:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:27,107 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2853 transitions. [2022-11-22 01:58:27,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:58:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2853 transitions. [2022-11-22 01:58:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:58:27,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:27,114 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:27,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:58:27,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 96065586, now seen corresponding path program 1 times [2022-11-22 01:58:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:27,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989902625] [2022-11-22 01:58:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:27,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:27,544 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 01:58:27,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:27,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989902625] [2022-11-22 01:58:27,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989902625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:27,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:27,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:58:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489763477] [2022-11-22 01:58:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:27,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:58:27,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:58:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:58:27,551 INFO L87 Difference]: Start difference. First operand 1806 states and 2853 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:58:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:30,043 INFO L93 Difference]: Finished difference Result 4527 states and 7160 transitions. [2022-11-22 01:58:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:58:30,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2022-11-22 01:58:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:30,063 INFO L225 Difference]: With dead ends: 4527 [2022-11-22 01:58:30,063 INFO L226 Difference]: Without dead ends: 2739 [2022-11-22 01:58:30,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:58:30,087 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1191 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 1472 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 01:58:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-11-22 01:58:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2648. [2022-11-22 01:58:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1811 states have (on average 1.549420209828824) internal successors, (2806), 1910 states have internal predecessors, (2806), 662 states have call successors, (662), 154 states have call predecessors, (662), 174 states have return successors, (709), 627 states have call predecessors, (709), 657 states have call successors, (709) [2022-11-22 01:58:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4177 transitions. [2022-11-22 01:58:30,358 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4177 transitions. Word has length 88 [2022-11-22 01:58:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:30,360 INFO L495 AbstractCegarLoop]: Abstraction has 2648 states and 4177 transitions. [2022-11-22 01:58:30,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:58:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4177 transitions. [2022-11-22 01:58:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 01:58:30,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:30,364 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:30,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:58:30,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 763407716, now seen corresponding path program 1 times [2022-11-22 01:58:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:30,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663935900] [2022-11-22 01:58:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:30,689 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 01:58:30,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:30,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663935900] [2022-11-22 01:58:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663935900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:30,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:58:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414992585] [2022-11-22 01:58:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:58:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:30,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:58:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:58:30,692 INFO L87 Difference]: Start difference. First operand 2648 states and 4177 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:58:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:31,431 INFO L93 Difference]: Finished difference Result 2749 states and 4343 transitions. [2022-11-22 01:58:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:58:31,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2022-11-22 01:58:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:31,449 INFO L225 Difference]: With dead ends: 2749 [2022-11-22 01:58:31,449 INFO L226 Difference]: Without dead ends: 2734 [2022-11-22 01:58:31,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:58:31,454 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 680 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:31,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1892 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:58:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2022-11-22 01:58:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2654. [2022-11-22 01:58:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 1817 states have (on average 1.5476059438635112) internal successors, (2812), 1916 states have internal predecessors, (2812), 662 states have call successors, (662), 154 states have call predecessors, (662), 174 states have return successors, (709), 627 states have call predecessors, (709), 657 states have call successors, (709) [2022-11-22 01:58:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 4183 transitions. [2022-11-22 01:58:31,680 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 4183 transitions. Word has length 92 [2022-11-22 01:58:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:31,681 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 4183 transitions. [2022-11-22 01:58:31,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:58:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 4183 transitions. [2022-11-22 01:58:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 01:58:31,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:31,684 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:58:31,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash 856941766, now seen corresponding path program 1 times [2022-11-22 01:58:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831713433] [2022-11-22 01:58:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:32,262 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 01:58:32,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:32,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831713433] [2022-11-22 01:58:32,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831713433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:32,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:32,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 01:58:32,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754154851] [2022-11-22 01:58:32,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:32,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:58:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:58:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:58:32,264 INFO L87 Difference]: Start difference. First operand 2654 states and 4183 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 01:58:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:38,783 INFO L93 Difference]: Finished difference Result 3071 states and 4805 transitions. [2022-11-22 01:58:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 01:58:38,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 97 [2022-11-22 01:58:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:38,804 INFO L225 Difference]: With dead ends: 3071 [2022-11-22 01:58:38,805 INFO L226 Difference]: Without dead ends: 3054 [2022-11-22 01:58:38,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:58:38,809 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 2569 mSDsluCounter, 3104 mSDsCounter, 0 mSdLazyCounter, 9165 mSolverCounterSat, 1502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2598 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 10667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1502 IncrementalHoareTripleChecker+Valid, 9165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:38,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2598 Valid, 3610 Invalid, 10667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1502 Valid, 9165 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-22 01:58:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2022-11-22 01:58:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2858. [2022-11-22 01:58:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 1972 states have (on average 1.5502028397565923) internal successors, (3057), 2069 states have internal predecessors, (3057), 680 states have call successors, (680), 186 states have call predecessors, (680), 205 states have return successors, (731), 646 states have call predecessors, (731), 675 states have call successors, (731) [2022-11-22 01:58:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4468 transitions. [2022-11-22 01:58:39,068 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4468 transitions. Word has length 97 [2022-11-22 01:58:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:39,069 INFO L495 AbstractCegarLoop]: Abstraction has 2858 states and 4468 transitions. [2022-11-22 01:58:39,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-22 01:58:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4468 transitions. [2022-11-22 01:58:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-22 01:58:39,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:39,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:39,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:58:39,073 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2001081751, now seen corresponding path program 1 times [2022-11-22 01:58:39,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:39,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424549307] [2022-11-22 01:58:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:58:39,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:39,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424549307] [2022-11-22 01:58:39,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424549307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:39,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:39,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:58:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357585204] [2022-11-22 01:58:39,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:39,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:39,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:39,204 INFO L87 Difference]: Start difference. First operand 2858 states and 4468 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:39,623 INFO L93 Difference]: Finished difference Result 7297 states and 11483 transitions. [2022-11-22 01:58:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2022-11-22 01:58:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:39,651 INFO L225 Difference]: With dead ends: 7297 [2022-11-22 01:58:39,651 INFO L226 Difference]: Without dead ends: 4459 [2022-11-22 01:58:39,665 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 01:58:39,666 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 571 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:39,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1260 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2022-11-22 01:58:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 4406. [2022-11-22 01:58:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 3050 states have (on average 1.5472131147540984) internal successors, (4719), 3207 states have internal predecessors, (4719), 1040 states have call successors, (1040), 281 states have call predecessors, (1040), 315 states have return successors, (1154), 981 states have call predecessors, (1154), 1035 states have call successors, (1154) [2022-11-22 01:58:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 6913 transitions. [2022-11-22 01:58:40,098 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 6913 transitions. Word has length 104 [2022-11-22 01:58:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:40,099 INFO L495 AbstractCegarLoop]: Abstraction has 4406 states and 6913 transitions. [2022-11-22 01:58:40,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 6913 transitions. [2022-11-22 01:58:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-22 01:58:40,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:40,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:40,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:58:40,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1903703777, now seen corresponding path program 1 times [2022-11-22 01:58:40,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:40,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336881646] [2022-11-22 01:58:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:40,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:58:40,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336881646] [2022-11-22 01:58:40,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336881646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:40,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:40,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:58:40,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186159001] [2022-11-22 01:58:40,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:40,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:40,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:40,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:40,227 INFO L87 Difference]: Start difference. First operand 4406 states and 6913 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:40,837 INFO L93 Difference]: Finished difference Result 11940 states and 18899 transitions. [2022-11-22 01:58:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:40,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2022-11-22 01:58:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:40,910 INFO L225 Difference]: With dead ends: 11940 [2022-11-22 01:58:40,910 INFO L226 Difference]: Without dead ends: 7557 [2022-11-22 01:58:40,935 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 01:58:40,936 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 570 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:40,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1266 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7557 states. [2022-11-22 01:58:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7557 to 7503. [2022-11-22 01:58:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7503 states, 5207 states have (on average 1.544267332437104) internal successors, (8041), 5484 states have internal predecessors, (8041), 1760 states have call successors, (1760), 471 states have call predecessors, (1760), 535 states have return successors, (2042), 1651 states have call predecessors, (2042), 1755 states have call successors, (2042) [2022-11-22 01:58:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7503 states to 7503 states and 11843 transitions. [2022-11-22 01:58:41,642 INFO L78 Accepts]: Start accepts. Automaton has 7503 states and 11843 transitions. Word has length 105 [2022-11-22 01:58:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:41,644 INFO L495 AbstractCegarLoop]: Abstraction has 7503 states and 11843 transitions. [2022-11-22 01:58:41,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7503 states and 11843 transitions. [2022-11-22 01:58:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-22 01:58:41,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:41,650 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:41,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:58:41,651 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1115009511, now seen corresponding path program 1 times [2022-11-22 01:58:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:41,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890401680] [2022-11-22 01:58:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:41,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:58:41,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:41,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890401680] [2022-11-22 01:58:41,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890401680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:41,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:41,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:58:41,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096099046] [2022-11-22 01:58:41,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:41,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:41,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:41,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:41,781 INFO L87 Difference]: Start difference. First operand 7503 states and 11843 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:43,012 INFO L93 Difference]: Finished difference Result 21227 states and 33966 transitions. [2022-11-22 01:58:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2022-11-22 01:58:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:43,086 INFO L225 Difference]: With dead ends: 21227 [2022-11-22 01:58:43,086 INFO L226 Difference]: Without dead ends: 13753 [2022-11-22 01:58:43,124 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 01:58:43,126 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 569 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:43,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 1272 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13753 states. [2022-11-22 01:58:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13753 to 13698. [2022-11-22 01:58:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13698 states, 9522 states have (on average 1.540957781978576) internal successors, (14673), 10039 states have internal predecessors, (14673), 3200 states have call successors, (3200), 851 states have call predecessors, (3200), 975 states have return successors, (3992), 2991 states have call predecessors, (3992), 3195 states have call successors, (3992) [2022-11-22 01:58:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13698 states to 13698 states and 21865 transitions. [2022-11-22 01:58:44,282 INFO L78 Accepts]: Start accepts. Automaton has 13698 states and 21865 transitions. Word has length 106 [2022-11-22 01:58:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:44,283 INFO L495 AbstractCegarLoop]: Abstraction has 13698 states and 21865 transitions. [2022-11-22 01:58:44,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13698 states and 21865 transitions. [2022-11-22 01:58:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-22 01:58:44,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:44,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:44,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:58:44,288 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash -205837021, now seen corresponding path program 1 times [2022-11-22 01:58:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:44,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682558200] [2022-11-22 01:58:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:44,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:58:44,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:44,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682558200] [2022-11-22 01:58:44,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682558200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:44,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:44,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:58:44,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437692272] [2022-11-22 01:58:44,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:44,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:44,398 INFO L87 Difference]: Start difference. First operand 13698 states and 21865 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:46,262 INFO L93 Difference]: Finished difference Result 39802 states and 64949 transitions. [2022-11-22 01:58:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-11-22 01:58:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:46,422 INFO L225 Difference]: With dead ends: 39802 [2022-11-22 01:58:46,423 INFO L226 Difference]: Without dead ends: 26145 [2022-11-22 01:58:46,487 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 01:58:46,488 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 568 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:46,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1278 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26145 states. [2022-11-22 01:58:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26145 to 26089. [2022-11-22 01:58:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26089 states, 18153 states have (on average 1.5372114801961108) internal successors, (27905), 19150 states have internal predecessors, (27905), 6080 states have call successors, (6080), 1611 states have call predecessors, (6080), 1855 states have return successors, (8510), 5671 states have call predecessors, (8510), 6075 states have call successors, (8510) [2022-11-22 01:58:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26089 states to 26089 states and 42495 transitions. [2022-11-22 01:58:49,068 INFO L78 Accepts]: Start accepts. Automaton has 26089 states and 42495 transitions. Word has length 107 [2022-11-22 01:58:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:49,070 INFO L495 AbstractCegarLoop]: Abstraction has 26089 states and 42495 transitions. [2022-11-22 01:58:49,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26089 states and 42495 transitions. [2022-11-22 01:58:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 01:58:49,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:49,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:58:49,076 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2086256997, now seen corresponding path program 1 times [2022-11-22 01:58:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:49,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025409591] [2022-11-22 01:58:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:58:49,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025409591] [2022-11-22 01:58:49,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025409591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:49,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:49,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:58:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539404217] [2022-11-22 01:58:49,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:49,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:49,224 INFO L87 Difference]: Start difference. First operand 26089 states and 42495 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:51,025 INFO L93 Difference]: Finished difference Result 27695 states and 45308 transitions. [2022-11-22 01:58:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:51,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2022-11-22 01:58:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:51,340 INFO L225 Difference]: With dead ends: 27695 [2022-11-22 01:58:51,340 INFO L226 Difference]: Without dead ends: 27684 [2022-11-22 01:58:51,350 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 01:58:51,351 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 554 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:51,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1276 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27684 states. [2022-11-22 01:58:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27684 to 27615. [2022-11-22 01:58:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27615 states, 19212 states have (on average 1.5356547990839058) internal successors, (29503), 20271 states have internal predecessors, (29503), 6438 states have call successors, (6438), 1706 states have call predecessors, (6438), 1964 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-11-22 01:58:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27615 states to 27615 states and 45182 transitions. [2022-11-22 01:58:53,190 INFO L78 Accepts]: Start accepts. Automaton has 27615 states and 45182 transitions. Word has length 108 [2022-11-22 01:58:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:53,191 INFO L495 AbstractCegarLoop]: Abstraction has 27615 states and 45182 transitions. [2022-11-22 01:58:53,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:58:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 27615 states and 45182 transitions. [2022-11-22 01:58:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-22 01:58:53,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:53,212 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:58:53,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1323351220, now seen corresponding path program 1 times [2022-11-22 01:58:53,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:53,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028849005] [2022-11-22 01:58:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:53,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:53,484 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 01:58:53,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028849005] [2022-11-22 01:58:53,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028849005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:53,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:53,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:58:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101929515] [2022-11-22 01:58:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:53,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:58:53,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:58:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:58:53,487 INFO L87 Difference]: Start difference. First operand 27615 states and 45182 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-22 01:58:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:56,014 INFO L93 Difference]: Finished difference Result 56127 states and 93776 transitions. [2022-11-22 01:58:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:58:56,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 161 [2022-11-22 01:58:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:56,156 INFO L225 Difference]: With dead ends: 56127 [2022-11-22 01:58:56,156 INFO L226 Difference]: Without dead ends: 28533 [2022-11-22 01:58:56,266 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 01:58:56,267 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 30 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:56,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1717 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28533 states. [2022-11-22 01:58:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28533 to 27723. [2022-11-22 01:58:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27723 states, 19320 states have (on average 1.5326604554865424) internal successors, (29611), 20379 states have internal predecessors, (29611), 6438 states have call successors, (6438), 1706 states have call predecessors, (6438), 1964 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-11-22 01:58:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27723 states to 27723 states and 45290 transitions. [2022-11-22 01:58:58,686 INFO L78 Accepts]: Start accepts. Automaton has 27723 states and 45290 transitions. Word has length 161 [2022-11-22 01:58:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:58,687 INFO L495 AbstractCegarLoop]: Abstraction has 27723 states and 45290 transitions. [2022-11-22 01:58:58,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-22 01:58:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 27723 states and 45290 transitions. [2022-11-22 01:58:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-22 01:58:58,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:58,698 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:58,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:58:58,698 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:58,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1334912410, now seen corresponding path program 1 times [2022-11-22 01:58:58,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:58,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382985962] [2022-11-22 01:58:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-22 01:58:59,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:59,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382985962] [2022-11-22 01:58:59,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382985962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:59,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293186362] [2022-11-22 01:58:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:59,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:59,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:59,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:58:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:58:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 01:58:59,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:58:59,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293186362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:59,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:58:59,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-22 01:58:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337305967] [2022-11-22 01:58:59,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:59,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:58:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:58:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:58:59,882 INFO L87 Difference]: Start difference. First operand 27723 states and 45290 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:59:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:02,544 INFO L93 Difference]: Finished difference Result 57531 states and 97014 transitions. [2022-11-22 01:59:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 168 [2022-11-22 01:59:02,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:02,719 INFO L225 Difference]: With dead ends: 57531 [2022-11-22 01:59:02,719 INFO L226 Difference]: Without dead ends: 29829 [2022-11-22 01:59:02,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:59:02,857 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 213 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:02,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1506 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:59:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29829 states. [2022-11-22 01:59:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29829 to 29829. [2022-11-22 01:59:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29829 states, 21372 states have (on average 1.5699513381995134) internal successors, (33553), 22431 states have internal predecessors, (33553), 6438 states have call successors, (6438), 1760 states have call predecessors, (6438), 2018 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-11-22 01:59:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29829 states to 29829 states and 49232 transitions. [2022-11-22 01:59:05,445 INFO L78 Accepts]: Start accepts. Automaton has 29829 states and 49232 transitions. Word has length 168 [2022-11-22 01:59:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:05,446 INFO L495 AbstractCegarLoop]: Abstraction has 29829 states and 49232 transitions. [2022-11-22 01:59:05,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:59:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 29829 states and 49232 transitions. [2022-11-22 01:59:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-22 01:59:05,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:05,460 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:05,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:05,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:05,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash 862196623, now seen corresponding path program 1 times [2022-11-22 01:59:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:05,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085332886] [2022-11-22 01:59:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:05,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-22 01:59:05,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085332886] [2022-11-22 01:59:05,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085332886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752404858] [2022-11-22 01:59:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:05,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:05,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:05,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:59:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:59:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 01:59:06,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:06,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752404858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:06,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:59:06,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 01:59:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286068277] [2022-11-22 01:59:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:06,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:06,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:59:06,413 INFO L87 Difference]: Start difference. First operand 29829 states and 49232 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:59:08,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:08,759 INFO L93 Difference]: Finished difference Result 61743 states and 104758 transitions. [2022-11-22 01:59:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:08,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 173 [2022-11-22 01:59:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:09,027 INFO L225 Difference]: With dead ends: 61743 [2022-11-22 01:59:09,027 INFO L226 Difference]: Without dead ends: 31935 [2022-11-22 01:59:09,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:59:09,102 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 211 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:09,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1506 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:59:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31935 states. [2022-11-22 01:59:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31935 to 31935. [2022-11-22 01:59:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31935 states, 23424 states have (on average 1.600708674863388) internal successors, (37495), 24483 states have internal predecessors, (37495), 6438 states have call successors, (6438), 1814 states have call predecessors, (6438), 2072 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-11-22 01:59:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31935 states to 31935 states and 53174 transitions. [2022-11-22 01:59:11,076 INFO L78 Accepts]: Start accepts. Automaton has 31935 states and 53174 transitions. Word has length 173 [2022-11-22 01:59:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:11,076 INFO L495 AbstractCegarLoop]: Abstraction has 31935 states and 53174 transitions. [2022-11-22 01:59:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:59:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31935 states and 53174 transitions. [2022-11-22 01:59:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-22 01:59:11,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:11,091 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:11,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:11,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 01:59:11,299 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash 514341151, now seen corresponding path program 1 times [2022-11-22 01:59:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:11,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088888002] [2022-11-22 01:59:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:11,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 01:59:11,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:11,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088888002] [2022-11-22 01:59:11,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088888002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727845504] [2022-11-22 01:59:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:11,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:11,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:11,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:59:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 2156 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:59:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 01:59:12,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727845504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:12,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:59:12,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 01:59:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340473131] [2022-11-22 01:59:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:12,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:12,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:59:12,285 INFO L87 Difference]: Start difference. First operand 31935 states and 53174 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:59:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:14,116 INFO L93 Difference]: Finished difference Result 65955 states and 112502 transitions. [2022-11-22 01:59:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:14,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 177 [2022-11-22 01:59:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:14,232 INFO L225 Difference]: With dead ends: 65955 [2022-11-22 01:59:14,232 INFO L226 Difference]: Without dead ends: 34041 [2022-11-22 01:59:14,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 177 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 01:59:14,305 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 209 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:14,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1506 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:59:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34041 states. [2022-11-22 01:59:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34041 to 34041. [2022-11-22 01:59:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34041 states, 25476 states have (on average 1.6265112262521588) internal successors, (41437), 26535 states have internal predecessors, (41437), 6438 states have call successors, (6438), 1868 states have call predecessors, (6438), 2126 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-11-22 01:59:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34041 states to 34041 states and 57116 transitions. [2022-11-22 01:59:16,372 INFO L78 Accepts]: Start accepts. Automaton has 34041 states and 57116 transitions. Word has length 177 [2022-11-22 01:59:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:16,373 INFO L495 AbstractCegarLoop]: Abstraction has 34041 states and 57116 transitions. [2022-11-22 01:59:16,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:59:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 34041 states and 57116 transitions. [2022-11-22 01:59:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-22 01:59:16,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:16,384 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:16,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:16,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:59:16,593 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash 108090500, now seen corresponding path program 1 times [2022-11-22 01:59:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:16,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802549525] [2022-11-22 01:59:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-22 01:59:16,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802549525] [2022-11-22 01:59:16,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802549525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794118913] [2022-11-22 01:59:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:16,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:16,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:16,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:16,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa637f30-cc50-46a9-aa77-2c2f46793fdd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:59:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:59:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 01:59:17,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:17,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794118913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:17,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:59:17,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 01:59:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540207382] [2022-11-22 01:59:17,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:17,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:59:17,304 INFO L87 Difference]: Start difference. First operand 34041 states and 57116 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29)