./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:35:23,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:35:23,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:35:23,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:35:23,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:35:23,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:35:23,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:35:23,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:35:23,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:35:23,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:35:23,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:35:23,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:35:23,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:35:23,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:35:23,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:35:23,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:35:23,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:35:23,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:35:23,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:35:23,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:35:23,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:35:23,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:35:23,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:35:23,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:35:23,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:35:23,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:35:23,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:35:23,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:35:23,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:35:23,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:35:23,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:35:23,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:35:23,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:35:23,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:35:23,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:35:23,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:35:23,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:35:23,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:35:23,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:35:23,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:35:23,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:35:23,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:35:23,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:35:23,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:35:23,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:35:23,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:35:23,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:35:23,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:35:23,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:35:23,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:35:23,913 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:35:23,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:35:23,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:35:23,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:35:23,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:35:23,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:35:23,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:35:23,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:35:23,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:35:23,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:35:23,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:35:23,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:35:23,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:35:23,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:35:23,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:35:23,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:35:23,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:35:23,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:35:23,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:35:23,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:35:23,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:35:23,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:35:23,920 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:35:23,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:35:23,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:35:23,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:35:23,921 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_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c [2021-11-19 04:35:24,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:35:24,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:35:24,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:35:24,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:35:24,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:35:24,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-11-19 04:35:24,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/data/85b14ad05/f5adbe1aaa154e1c933a01c486b058dd/FLAGc1eb452a8 [2021-11-19 04:35:24,978 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:35:24,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-11-19 04:35:24,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/data/85b14ad05/f5adbe1aaa154e1c933a01c486b058dd/FLAGc1eb452a8 [2021-11-19 04:35:25,235 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/data/85b14ad05/f5adbe1aaa154e1c933a01c486b058dd [2021-11-19 04:35:25,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:35:25,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:35:25,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:35:25,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:35:25,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:35:25,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad1857e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25, skipping insertion in model container [2021-11-19 04:35:25,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:35:25,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:35:25,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c[2072,2085] [2021-11-19 04:35:25,647 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:35:25,656 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:35:25,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c[2072,2085] [2021-11-19 04:35:25,779 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:35:25,810 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:35:25,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25 WrapperNode [2021-11-19 04:35:25,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:35:25,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:35:25,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:35:25,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:35:25,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,915 INFO L137 Inliner]: procedures = 38, calls = 66, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 755 [2021-11-19 04:35:25,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:35:25,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:35:25,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:35:25,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:35:25,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:25,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:26,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:26,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:26,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:35:26,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:35:26,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:35:26,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:35:26,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (1/1) ... [2021-11-19 04:35:26,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:35:26,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:35:26,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:35:26,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:35:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:35:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-11-19 04:35:26,112 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-11-19 04:35:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-11-19 04:35:26,112 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-11-19 04:35:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-11-19 04:35:26,112 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-11-19 04:35:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-11-19 04:35:26,113 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-11-19 04:35:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-11-19 04:35:26,113 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-11-19 04:35:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-11-19 04:35:26,113 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-11-19 04:35:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:35:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-11-19 04:35:26,113 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-11-19 04:35:26,114 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-11-19 04:35:26,114 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-11-19 04:35:26,114 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-11-19 04:35:26,114 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-11-19 04:35:26,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:35:26,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:35:26,318 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:35:26,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:35:26,330 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:35:26,408 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-11-19 04:35:26,408 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-11-19 04:35:26,410 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:35:26,480 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-11-19 04:35:26,481 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-11-19 04:35:26,548 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:35:26,554 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:35:26,565 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:35:27,058 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !false; [2021-11-19 04:35:27,058 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume false; [2021-11-19 04:35:27,058 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2021-11-19 04:35:27,058 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2021-11-19 04:35:27,058 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##106: assume !false; [2021-11-19 04:35:27,058 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##105: assume false; [2021-11-19 04:35:27,060 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:35:27,100 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-11-19 04:35:27,100 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-11-19 04:35:27,171 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:35:27,185 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:35:27,186 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:35:27,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:35:27 BoogieIcfgContainer [2021-11-19 04:35:27,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:35:27,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:35:27,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:35:27,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:35:27,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:35:25" (1/3) ... [2021-11-19 04:35:27,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121c2563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:35:27, skipping insertion in model container [2021-11-19 04:35:27,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:25" (2/3) ... [2021-11-19 04:35:27,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121c2563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:35:27, skipping insertion in model container [2021-11-19 04:35:27,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:35:27" (3/3) ... [2021-11-19 04:35:27,197 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2021-11-19 04:35:27,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:35:27,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:35:27,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:35:27,264 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:35:27,264 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:35:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-19 04:35:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:35:27,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:27,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:27,297 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1911400740, now seen corresponding path program 1 times [2021-11-19 04:35:27,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:27,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435970704] [2021-11-19 04:35:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:27,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:27,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:27,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435970704] [2021-11-19 04:35:27,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435970704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:27,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:27,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:35:27,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515828284] [2021-11-19 04:35:27,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:27,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:35:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:35:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:27,545 INFO L87 Difference]: Start difference. First operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:27,703 INFO L93 Difference]: Finished difference Result 449 states and 690 transitions. [2021-11-19 04:35:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:35:27,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 04:35:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:27,726 INFO L225 Difference]: With dead ends: 449 [2021-11-19 04:35:27,726 INFO L226 Difference]: Without dead ends: 236 [2021-11-19 04:35:27,738 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:35:27,744 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 8 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:27,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 635 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-19 04:35:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-19 04:35:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 183 states have (on average 1.4098360655737705) internal successors, (258), 198 states have internal predecessors, (258), 44 states have call successors, (44), 9 states have call predecessors, (44), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-19 04:35:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 332 transitions. [2021-11-19 04:35:27,871 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 332 transitions. Word has length 13 [2021-11-19 04:35:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:27,871 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 332 transitions. [2021-11-19 04:35:27,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 332 transitions. [2021-11-19 04:35:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:35:27,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:27,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:27,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:35:27,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1078790828, now seen corresponding path program 1 times [2021-11-19 04:35:27,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:27,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871393059] [2021-11-19 04:35:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:27,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:27,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:27,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871393059] [2021-11-19 04:35:27,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871393059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:27,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:27,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:35:27,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510965378] [2021-11-19 04:35:27,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:28,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:35:28,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:28,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:35:28,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:28,005 INFO L87 Difference]: Start difference. First operand 236 states and 332 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:28,196 INFO L93 Difference]: Finished difference Result 536 states and 777 transitions. [2021-11-19 04:35:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:35:28,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-19 04:35:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:28,207 INFO L225 Difference]: With dead ends: 536 [2021-11-19 04:35:28,208 INFO L226 Difference]: Without dead ends: 377 [2021-11-19 04:35:28,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:28,215 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 250 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 680 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-19 04:35:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 357. [2021-11-19 04:35:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 283 states have (on average 1.3851590106007068) internal successors, (392), 291 states have internal predecessors, (392), 59 states have call successors, (59), 16 states have call predecessors, (59), 14 states have return successors, (67), 51 states have call predecessors, (67), 48 states have call successors, (67) [2021-11-19 04:35:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 518 transitions. [2021-11-19 04:35:28,264 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 518 transitions. Word has length 15 [2021-11-19 04:35:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:28,264 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 518 transitions. [2021-11-19 04:35:28,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 518 transitions. [2021-11-19 04:35:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:35:28,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:28,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:28,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:35:28,273 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash -320586800, now seen corresponding path program 1 times [2021-11-19 04:35:28,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:28,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734664934] [2021-11-19 04:35:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:28,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:28,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:28,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734664934] [2021-11-19 04:35:28,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734664934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:28,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:28,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:35:28,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416701384] [2021-11-19 04:35:28,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:28,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:35:28,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:35:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:28,422 INFO L87 Difference]: Start difference. First operand 357 states and 518 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:28,471 INFO L93 Difference]: Finished difference Result 823 states and 1229 transitions. [2021-11-19 04:35:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:35:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-19 04:35:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:28,478 INFO L225 Difference]: With dead ends: 823 [2021-11-19 04:35:28,479 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 04:35:28,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:28,482 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 255 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:28,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 578 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:35:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 04:35:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 519. [2021-11-19 04:35:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 411 states have (on average 1.389294403892944) internal successors, (571), 418 states have internal predecessors, (571), 84 states have call successors, (84), 24 states have call predecessors, (84), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2021-11-19 04:35:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 772 transitions. [2021-11-19 04:35:28,531 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 772 transitions. Word has length 20 [2021-11-19 04:35:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:28,531 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 772 transitions. [2021-11-19 04:35:28,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 772 transitions. [2021-11-19 04:35:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:35:28,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:28,534 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:28,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:35:28,537 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -175921138, now seen corresponding path program 1 times [2021-11-19 04:35:28,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:28,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869483725] [2021-11-19 04:35:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:28,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:28,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:28,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869483725] [2021-11-19 04:35:28,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869483725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:28,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:28,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:35:28,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047186623] [2021-11-19 04:35:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:28,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:35:28,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:35:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:28,612 INFO L87 Difference]: Start difference. First operand 519 states and 772 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:28,688 INFO L93 Difference]: Finished difference Result 534 states and 792 transitions. [2021-11-19 04:35:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:35:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 04:35:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:28,694 INFO L225 Difference]: With dead ends: 534 [2021-11-19 04:35:28,695 INFO L226 Difference]: Without dead ends: 530 [2021-11-19 04:35:28,696 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:35:28,697 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 21 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:28,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 557 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-19 04:35:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 529. [2021-11-19 04:35:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 422 states have (on average 1.386255924170616) internal successors, (585), 427 states have internal predecessors, (585), 83 states have call successors, (83), 25 states have call predecessors, (83), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2021-11-19 04:35:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 785 transitions. [2021-11-19 04:35:28,754 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 785 transitions. Word has length 24 [2021-11-19 04:35:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:28,755 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 785 transitions. [2021-11-19 04:35:28,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 785 transitions. [2021-11-19 04:35:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:35:28,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:28,765 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:28,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:35:28,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:28,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1035800982, now seen corresponding path program 1 times [2021-11-19 04:35:28,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:28,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831819904] [2021-11-19 04:35:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:28,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-19 04:35:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:28,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:28,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831819904] [2021-11-19 04:35:28,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831819904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:28,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:28,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:35:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634187334] [2021-11-19 04:35:28,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:28,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:28,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:28,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:28,984 INFO L87 Difference]: Start difference. First operand 529 states and 785 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:29,454 INFO L93 Difference]: Finished difference Result 582 states and 861 transitions. [2021-11-19 04:35:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:35:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-19 04:35:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:29,460 INFO L225 Difference]: With dead ends: 582 [2021-11-19 04:35:29,460 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 04:35:29,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:29,462 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 410 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:29,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 798 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 04:35:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-11-19 04:35:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.3803131991051454) internal successors, (617), 454 states have internal predecessors, (617), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2021-11-19 04:35:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 826 transitions. [2021-11-19 04:35:29,507 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 826 transitions. Word has length 27 [2021-11-19 04:35:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:29,508 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 826 transitions. [2021-11-19 04:35:29,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 826 transitions. [2021-11-19 04:35:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:35:29,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:29,510 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:29,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:35:29,510 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1813713707, now seen corresponding path program 1 times [2021-11-19 04:35:29,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:29,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385046892] [2021-11-19 04:35:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:29,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-19 04:35:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:29,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:29,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385046892] [2021-11-19 04:35:29,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385046892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:29,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:29,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:35:29,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117055347] [2021-11-19 04:35:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:29,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:29,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:29,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:29,635 INFO L87 Difference]: Start difference. First operand 556 states and 826 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:30,019 INFO L93 Difference]: Finished difference Result 579 states and 854 transitions. [2021-11-19 04:35:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:35:30,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-19 04:35:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:30,025 INFO L225 Difference]: With dead ends: 579 [2021-11-19 04:35:30,026 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 04:35:30,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:30,027 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 408 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:30,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 799 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 04:35:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-11-19 04:35:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.378076062639821) internal successors, (616), 454 states have internal predecessors, (616), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2021-11-19 04:35:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 825 transitions. [2021-11-19 04:35:30,072 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 825 transitions. Word has length 28 [2021-11-19 04:35:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:30,073 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 825 transitions. [2021-11-19 04:35:30,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 825 transitions. [2021-11-19 04:35:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:35:30,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:30,075 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:30,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:35:30,076 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash 123360193, now seen corresponding path program 1 times [2021-11-19 04:35:30,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:30,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765909932] [2021-11-19 04:35:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:30,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:30,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-19 04:35:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:30,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:30,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765909932] [2021-11-19 04:35:30,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765909932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:30,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:30,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:35:30,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387829568] [2021-11-19 04:35:30,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:30,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:35:30,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:35:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:35:30,115 INFO L87 Difference]: Start difference. First operand 556 states and 825 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:30,392 INFO L93 Difference]: Finished difference Result 1018 states and 1542 transitions. [2021-11-19 04:35:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:35:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-19 04:35:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:30,403 INFO L225 Difference]: With dead ends: 1018 [2021-11-19 04:35:30,403 INFO L226 Difference]: Without dead ends: 989 [2021-11-19 04:35:30,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:35:30,408 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 417 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:30,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 777 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-11-19 04:35:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 949. [2021-11-19 04:35:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 759 states have (on average 1.391304347826087) internal successors, (1056), 766 states have internal predecessors, (1056), 141 states have call successors, (141), 47 states have call predecessors, (141), 48 states have return successors, (249), 137 states have call predecessors, (249), 132 states have call successors, (249) [2021-11-19 04:35:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1446 transitions. [2021-11-19 04:35:30,508 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1446 transitions. Word has length 29 [2021-11-19 04:35:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:30,509 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1446 transitions. [2021-11-19 04:35:30,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1446 transitions. [2021-11-19 04:35:30,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:35:30,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:30,510 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:30,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:35:30,511 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash -462412845, now seen corresponding path program 1 times [2021-11-19 04:35:30,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:30,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918643889] [2021-11-19 04:35:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:30,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-19 04:35:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:30,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:30,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918643889] [2021-11-19 04:35:30,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918643889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:30,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:30,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:35:30,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330585383] [2021-11-19 04:35:30,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:30,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:35:30,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:35:30,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:35:30,589 INFO L87 Difference]: Start difference. First operand 949 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:30,818 INFO L93 Difference]: Finished difference Result 985 states and 1494 transitions. [2021-11-19 04:35:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:35:30,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-19 04:35:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:30,827 INFO L225 Difference]: With dead ends: 985 [2021-11-19 04:35:30,828 INFO L226 Difference]: Without dead ends: 966 [2021-11-19 04:35:30,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:30,829 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 84 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:30,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1008 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-19 04:35:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 945. [2021-11-19 04:35:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 756 states have (on average 1.3915343915343916) internal successors, (1052), 763 states have internal predecessors, (1052), 140 states have call successors, (140), 47 states have call predecessors, (140), 48 states have return successors, (248), 136 states have call predecessors, (248), 131 states have call successors, (248) [2021-11-19 04:35:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1440 transitions. [2021-11-19 04:35:30,908 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1440 transitions. Word has length 30 [2021-11-19 04:35:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:30,908 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1440 transitions. [2021-11-19 04:35:30,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1440 transitions. [2021-11-19 04:35:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:35:30,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:30,909 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:30,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:35:30,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash 415913558, now seen corresponding path program 1 times [2021-11-19 04:35:30,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:30,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027576515] [2021-11-19 04:35:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:30,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:30,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:30,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027576515] [2021-11-19 04:35:30,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027576515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:30,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:30,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:35:30,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749763832] [2021-11-19 04:35:30,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:30,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:35:30,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:35:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:30,949 INFO L87 Difference]: Start difference. First operand 945 states and 1440 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:31,024 INFO L93 Difference]: Finished difference Result 1334 states and 2062 transitions. [2021-11-19 04:35:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:35:31,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-19 04:35:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:31,029 INFO L225 Difference]: With dead ends: 1334 [2021-11-19 04:35:31,029 INFO L226 Difference]: Without dead ends: 510 [2021-11-19 04:35:31,034 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:35:31,035 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 264 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:31,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:35:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-19 04:35:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-19 04:35:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 408 states have (on average 1.3553921568627452) internal successors, (553), 414 states have internal predecessors, (553), 78 states have call successors, (78), 23 states have call predecessors, (78), 23 states have return successors, (123), 73 states have call predecessors, (123), 71 states have call successors, (123) [2021-11-19 04:35:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 754 transitions. [2021-11-19 04:35:31,075 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 754 transitions. Word has length 34 [2021-11-19 04:35:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:31,076 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 754 transitions. [2021-11-19 04:35:31,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 754 transitions. [2021-11-19 04:35:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:35:31,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:31,077 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:31,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:35:31,077 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:31,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:31,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2105808494, now seen corresponding path program 1 times [2021-11-19 04:35:31,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:31,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382733269] [2021-11-19 04:35:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:31,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:31,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:31,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382733269] [2021-11-19 04:35:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382733269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:31,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:31,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:35:31,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796519231] [2021-11-19 04:35:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:31,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:31,140 INFO L87 Difference]: Start difference. First operand 510 states and 754 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:31,350 INFO L93 Difference]: Finished difference Result 553 states and 805 transitions. [2021-11-19 04:35:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:35:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-19 04:35:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:31,356 INFO L225 Difference]: With dead ends: 553 [2021-11-19 04:35:31,357 INFO L226 Difference]: Without dead ends: 519 [2021-11-19 04:35:31,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:31,358 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 94 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:31,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1179 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-19 04:35:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2021-11-19 04:35:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 407 states have (on average 1.3513513513513513) internal successors, (550), 413 states have internal predecessors, (550), 77 states have call successors, (77), 23 states have call predecessors, (77), 23 states have return successors, (122), 72 states have call predecessors, (122), 70 states have call successors, (122) [2021-11-19 04:35:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 749 transitions. [2021-11-19 04:35:31,400 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 749 transitions. Word has length 34 [2021-11-19 04:35:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:31,400 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 749 transitions. [2021-11-19 04:35:31,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 749 transitions. [2021-11-19 04:35:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:35:31,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:31,403 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:31,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:35:31,404 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:31,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1486754927, now seen corresponding path program 1 times [2021-11-19 04:35:31,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:31,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310291737] [2021-11-19 04:35:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:31,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:31,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:35:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:31,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:31,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310291737] [2021-11-19 04:35:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310291737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:31,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:31,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:35:31,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210966382] [2021-11-19 04:35:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:35:31,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:35:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:35:31,480 INFO L87 Difference]: Start difference. First operand 508 states and 749 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:31,846 INFO L93 Difference]: Finished difference Result 720 states and 1102 transitions. [2021-11-19 04:35:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:35:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-19 04:35:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:31,854 INFO L225 Difference]: With dead ends: 720 [2021-11-19 04:35:31,854 INFO L226 Difference]: Without dead ends: 712 [2021-11-19 04:35:31,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:35:31,856 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 232 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:31,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 668 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-19 04:35:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 566. [2021-11-19 04:35:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 455 states have (on average 1.3516483516483517) internal successors, (615), 461 states have internal predecessors, (615), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2021-11-19 04:35:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 841 transitions. [2021-11-19 04:35:31,916 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 841 transitions. Word has length 34 [2021-11-19 04:35:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:31,916 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 841 transitions. [2021-11-19 04:35:31,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 841 transitions. [2021-11-19 04:35:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:35:31,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:31,918 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:31,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:35:31,918 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1608594996, now seen corresponding path program 1 times [2021-11-19 04:35:31,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:31,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378675372] [2021-11-19 04:35:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:31,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:31,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:35:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:32,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:32,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378675372] [2021-11-19 04:35:32,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378675372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:32,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:32,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:35:32,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329394786] [2021-11-19 04:35:32,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:32,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:35:32,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:35:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:35:32,010 INFO L87 Difference]: Start difference. First operand 566 states and 841 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:32,378 INFO L93 Difference]: Finished difference Result 583 states and 860 transitions. [2021-11-19 04:35:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:35:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-19 04:35:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:32,384 INFO L225 Difference]: With dead ends: 583 [2021-11-19 04:35:32,384 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 04:35:32,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:35:32,385 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 66 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:32,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1471 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 04:35:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 574. [2021-11-19 04:35:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 463 states have (on average 1.349892008639309) internal successors, (625), 469 states have internal predecessors, (625), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2021-11-19 04:35:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 851 transitions. [2021-11-19 04:35:32,449 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 851 transitions. Word has length 35 [2021-11-19 04:35:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:32,449 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 851 transitions. [2021-11-19 04:35:32,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 851 transitions. [2021-11-19 04:35:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:35:32,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:32,451 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:32,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:35:32,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1608318166, now seen corresponding path program 1 times [2021-11-19 04:35:32,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:32,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116926839] [2021-11-19 04:35:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:32,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:32,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:35:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:32,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:32,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116926839] [2021-11-19 04:35:32,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116926839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:32,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:32,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:35:32,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567897102] [2021-11-19 04:35:32,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:32,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:35:32,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:32,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:35:32,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:35:32,542 INFO L87 Difference]: Start difference. First operand 574 states and 851 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:32,883 INFO L93 Difference]: Finished difference Result 1065 states and 1652 transitions. [2021-11-19 04:35:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:35:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-19 04:35:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:32,889 INFO L225 Difference]: With dead ends: 1065 [2021-11-19 04:35:32,890 INFO L226 Difference]: Without dead ends: 605 [2021-11-19 04:35:32,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:32,894 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 75 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:32,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1640 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-19 04:35:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 586. [2021-11-19 04:35:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 474 states have (on average 1.3544303797468353) internal successors, (642), 481 states have internal predecessors, (642), 84 states have call successors, (84), 25 states have call predecessors, (84), 27 states have return successors, (161), 80 states have call predecessors, (161), 77 states have call successors, (161) [2021-11-19 04:35:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 887 transitions. [2021-11-19 04:35:32,947 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 887 transitions. Word has length 35 [2021-11-19 04:35:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:32,947 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 887 transitions. [2021-11-19 04:35:32,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:32,947 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 887 transitions. [2021-11-19 04:35:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:35:32,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:32,949 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:32,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:35:32,949 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1299938960, now seen corresponding path program 1 times [2021-11-19 04:35:32,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:32,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381918561] [2021-11-19 04:35:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:32,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:33,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:33,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381918561] [2021-11-19 04:35:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381918561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:33,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:33,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:35:33,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285197662] [2021-11-19 04:35:33,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:33,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:35:33,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:35:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:35:33,014 INFO L87 Difference]: Start difference. First operand 586 states and 887 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:33,176 INFO L93 Difference]: Finished difference Result 610 states and 910 transitions. [2021-11-19 04:35:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:35:33,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-19 04:35:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:33,181 INFO L225 Difference]: With dead ends: 610 [2021-11-19 04:35:33,182 INFO L226 Difference]: Without dead ends: 582 [2021-11-19 04:35:33,183 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:35:33,183 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 270 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:33,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 410 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:33,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-19 04:35:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 580. [2021-11-19 04:35:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 468 states have (on average 1.3525641025641026) internal successors, (633), 476 states have internal predecessors, (633), 84 states have call successors, (84), 25 states have call predecessors, (84), 27 states have return successors, (159), 79 states have call predecessors, (159), 77 states have call successors, (159) [2021-11-19 04:35:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 876 transitions. [2021-11-19 04:35:33,251 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 876 transitions. Word has length 34 [2021-11-19 04:35:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:33,251 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 876 transitions. [2021-11-19 04:35:33,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 876 transitions. [2021-11-19 04:35:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:35:33,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:33,253 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:33,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:35:33,253 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1171529217, now seen corresponding path program 1 times [2021-11-19 04:35:33,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:33,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125090135] [2021-11-19 04:35:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:33,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:35:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:33,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:33,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125090135] [2021-11-19 04:35:33,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125090135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:33,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:33,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:35:33,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841247502] [2021-11-19 04:35:33,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:33,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:33,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:33,323 INFO L87 Difference]: Start difference. First operand 580 states and 876 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:33,890 INFO L93 Difference]: Finished difference Result 738 states and 1149 transitions. [2021-11-19 04:35:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:35:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-11-19 04:35:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:33,897 INFO L225 Difference]: With dead ends: 738 [2021-11-19 04:35:33,897 INFO L226 Difference]: Without dead ends: 721 [2021-11-19 04:35:33,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:33,899 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 662 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:33,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 768 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-11-19 04:35:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 567. [2021-11-19 04:35:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 457 states have (on average 1.3544857768052516) internal successors, (619), 464 states have internal predecessors, (619), 83 states have call successors, (83), 25 states have call predecessors, (83), 26 states have return successors, (140), 78 states have call predecessors, (140), 76 states have call successors, (140) [2021-11-19 04:35:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 842 transitions. [2021-11-19 04:35:33,950 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 842 transitions. Word has length 36 [2021-11-19 04:35:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:33,950 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 842 transitions. [2021-11-19 04:35:33,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 842 transitions. [2021-11-19 04:35:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:35:33,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:33,952 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:33,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:35:33,952 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2056934280, now seen corresponding path program 1 times [2021-11-19 04:35:33,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:33,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014924259] [2021-11-19 04:35:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:33,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:35:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:33,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:33,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014924259] [2021-11-19 04:35:33,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014924259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:33,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:33,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:35:33,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848674198] [2021-11-19 04:35:33,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:34,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:35:34,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:35:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:35:34,001 INFO L87 Difference]: Start difference. First operand 567 states and 842 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:34,275 INFO L93 Difference]: Finished difference Result 630 states and 904 transitions. [2021-11-19 04:35:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:35:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-11-19 04:35:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:34,279 INFO L225 Difference]: With dead ends: 630 [2021-11-19 04:35:34,279 INFO L226 Difference]: Without dead ends: 377 [2021-11-19 04:35:34,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:35:34,282 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 315 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:34,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 650 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-19 04:35:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2021-11-19 04:35:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 295 states have (on average 1.3016949152542372) internal successors, (384), 302 states have internal predecessors, (384), 47 states have call successors, (47), 17 states have call predecessors, (47), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2021-11-19 04:35:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 492 transitions. [2021-11-19 04:35:34,310 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 492 transitions. Word has length 39 [2021-11-19 04:35:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:34,310 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 492 transitions. [2021-11-19 04:35:34,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 492 transitions. [2021-11-19 04:35:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:35:34,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:34,312 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:34,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:35:34,312 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:34,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1922765712, now seen corresponding path program 1 times [2021-11-19 04:35:34,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:34,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052348898] [2021-11-19 04:35:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:34,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:34,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:34,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052348898] [2021-11-19 04:35:34,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052348898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:34,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:34,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:35:34,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297715588] [2021-11-19 04:35:34,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:34,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:35:34,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:35:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:35:34,346 INFO L87 Difference]: Start difference. First operand 359 states and 492 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:34,448 INFO L93 Difference]: Finished difference Result 504 states and 710 transitions. [2021-11-19 04:35:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:35:34,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 04:35:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:34,453 INFO L225 Difference]: With dead ends: 504 [2021-11-19 04:35:34,453 INFO L226 Difference]: Without dead ends: 491 [2021-11-19 04:35:34,454 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:35:34,455 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 161 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:34,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 641 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-19 04:35:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 375. [2021-11-19 04:35:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 310 states have (on average 1.2903225806451613) internal successors, (400), 317 states have internal predecessors, (400), 47 states have call successors, (47), 17 states have call predecessors, (47), 17 states have return successors, (62), 41 states have call predecessors, (62), 40 states have call successors, (62) [2021-11-19 04:35:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 509 transitions. [2021-11-19 04:35:34,486 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 509 transitions. Word has length 35 [2021-11-19 04:35:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:34,487 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 509 transitions. [2021-11-19 04:35:34,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 509 transitions. [2021-11-19 04:35:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:35:34,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:34,488 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:34,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:35:34,489 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:34,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1798212464, now seen corresponding path program 1 times [2021-11-19 04:35:34,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:34,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346545390] [2021-11-19 04:35:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:34,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:34,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:34,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346545390] [2021-11-19 04:35:34,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346545390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:34,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:34,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:35:34,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080108011] [2021-11-19 04:35:34,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:34,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:35:34,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:35:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:35:34,537 INFO L87 Difference]: Start difference. First operand 375 states and 509 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:34,681 INFO L93 Difference]: Finished difference Result 387 states and 521 transitions. [2021-11-19 04:35:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:35:34,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 04:35:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:34,694 INFO L225 Difference]: With dead ends: 387 [2021-11-19 04:35:34,694 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 04:35:34,695 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:35:34,696 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 262 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:34,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 411 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 04:35:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2021-11-19 04:35:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 288 states have (on average 1.28125) internal successors, (369), 294 states have internal predecessors, (369), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2021-11-19 04:35:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 476 transitions. [2021-11-19 04:35:34,741 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 476 transitions. Word has length 35 [2021-11-19 04:35:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:34,741 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 476 transitions. [2021-11-19 04:35:34,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 476 transitions. [2021-11-19 04:35:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:35:34,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:34,743 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:34,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:35:34,743 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1722219638, now seen corresponding path program 1 times [2021-11-19 04:35:34,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:34,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221087064] [2021-11-19 04:35:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:34,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:34,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:34,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:34,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221087064] [2021-11-19 04:35:34,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221087064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:34,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:34,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:35:34,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007092115] [2021-11-19 04:35:34,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:34,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:35:34,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:34,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:35:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:35:34,813 INFO L87 Difference]: Start difference. First operand 351 states and 476 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:35,147 INFO L93 Difference]: Finished difference Result 355 states and 479 transitions. [2021-11-19 04:35:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:35:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-11-19 04:35:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:35,150 INFO L225 Difference]: With dead ends: 355 [2021-11-19 04:35:35,150 INFO L226 Difference]: Without dead ends: 324 [2021-11-19 04:35:35,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:35:35,152 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 60 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:35,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1424 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-19 04:35:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-11-19 04:35:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 263 states have (on average 1.2889733840304183) internal successors, (339), 269 states have internal predecessors, (339), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2021-11-19 04:35:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 444 transitions. [2021-11-19 04:35:35,182 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 444 transitions. Word has length 37 [2021-11-19 04:35:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:35,182 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 444 transitions. [2021-11-19 04:35:35,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 444 transitions. [2021-11-19 04:35:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:35:35,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:35,183 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:35,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:35:35,184 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash -70447595, now seen corresponding path program 1 times [2021-11-19 04:35:35,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:35,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467950966] [2021-11-19 04:35:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:35,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:35,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:35,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467950966] [2021-11-19 04:35:35,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467950966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:35,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:35,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:35:35,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377690475] [2021-11-19 04:35:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:35,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:35:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:35:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:35:35,285 INFO L87 Difference]: Start difference. First operand 324 states and 444 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:35,385 INFO L93 Difference]: Finished difference Result 345 states and 466 transitions. [2021-11-19 04:35:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:35:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-19 04:35:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:35,388 INFO L225 Difference]: With dead ends: 345 [2021-11-19 04:35:35,389 INFO L226 Difference]: Without dead ends: 323 [2021-11-19 04:35:35,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:35:35,390 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 43 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:35,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1424 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:35:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-19 04:35:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-19 04:35:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 262 states have (on average 1.286259541984733) internal successors, (337), 268 states have internal predecessors, (337), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2021-11-19 04:35:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2021-11-19 04:35:35,416 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 36 [2021-11-19 04:35:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:35,417 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2021-11-19 04:35:35,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2021-11-19 04:35:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:35:35,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:35,418 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:35,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:35:35,419 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2018897985, now seen corresponding path program 1 times [2021-11-19 04:35:35,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:35,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338261926] [2021-11-19 04:35:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:35,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:35,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:35:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:35,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:35,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338261926] [2021-11-19 04:35:35,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338261926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:35,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:35,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:35:35,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478240888] [2021-11-19 04:35:35,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:35,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:35,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:35,477 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:35,651 INFO L93 Difference]: Finished difference Result 352 states and 479 transitions. [2021-11-19 04:35:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:35:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-19 04:35:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:35,654 INFO L225 Difference]: With dead ends: 352 [2021-11-19 04:35:35,655 INFO L226 Difference]: Without dead ends: 322 [2021-11-19 04:35:35,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:35:35,656 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 79 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:35,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1079 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:35:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-19 04:35:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 308. [2021-11-19 04:35:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 249 states have (on average 1.2931726907630523) internal successors, (322), 255 states have internal predecessors, (322), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-11-19 04:35:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 425 transitions. [2021-11-19 04:35:35,687 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 425 transitions. Word has length 38 [2021-11-19 04:35:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:35,688 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 425 transitions. [2021-11-19 04:35:35,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 425 transitions. [2021-11-19 04:35:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:35:35,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:35,689 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:35,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:35:35,690 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:35,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash 233678808, now seen corresponding path program 1 times [2021-11-19 04:35:35,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:35,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976703137] [2021-11-19 04:35:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:35,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:35,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:35,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976703137] [2021-11-19 04:35:35,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976703137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:35,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:35,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:35:35,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104475461] [2021-11-19 04:35:35,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:35,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:35,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:35,754 INFO L87 Difference]: Start difference. First operand 308 states and 425 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:35,850 INFO L93 Difference]: Finished difference Result 323 states and 441 transitions. [2021-11-19 04:35:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:35:35,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-19 04:35:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:35,855 INFO L225 Difference]: With dead ends: 323 [2021-11-19 04:35:35,855 INFO L226 Difference]: Without dead ends: 319 [2021-11-19 04:35:35,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:35,856 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 46 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:35,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1090 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:35:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-19 04:35:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2021-11-19 04:35:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 256 states have (on average 1.2890625) internal successors, (330), 262 states have internal predecessors, (330), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-11-19 04:35:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 433 transitions. [2021-11-19 04:35:35,883 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 433 transitions. Word has length 37 [2021-11-19 04:35:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:35,883 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 433 transitions. [2021-11-19 04:35:35,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 433 transitions. [2021-11-19 04:35:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:35:35,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:35,884 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:35,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:35:35,885 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash 233401978, now seen corresponding path program 1 times [2021-11-19 04:35:35,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:35,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702981862] [2021-11-19 04:35:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:35,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:35,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:35,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702981862] [2021-11-19 04:35:35,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702981862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:35,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:35,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:35:35,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612141191] [2021-11-19 04:35:35,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:35,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:35:35,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:35:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:35:35,932 INFO L87 Difference]: Start difference. First operand 315 states and 433 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:36,170 INFO L93 Difference]: Finished difference Result 431 states and 618 transitions. [2021-11-19 04:35:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:35:36,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-19 04:35:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:36,174 INFO L225 Difference]: With dead ends: 431 [2021-11-19 04:35:36,175 INFO L226 Difference]: Without dead ends: 402 [2021-11-19 04:35:36,175 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:35:36,176 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 345 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:36,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 501 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-19 04:35:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-11-19 04:35:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 233 states have (on average 1.3004291845493563) internal successors, (303), 239 states have internal predecessors, (303), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-11-19 04:35:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2021-11-19 04:35:36,210 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 37 [2021-11-19 04:35:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:36,211 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2021-11-19 04:35:36,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2021-11-19 04:35:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:35:36,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:36,212 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:36,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 04:35:36,213 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1150124824, now seen corresponding path program 1 times [2021-11-19 04:35:36,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:36,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373665188] [2021-11-19 04:35:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:36,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:35:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:36,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:35:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:36,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:36,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373665188] [2021-11-19 04:35:36,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373665188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:36,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:36,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:35:36,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35241353] [2021-11-19 04:35:36,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:36,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:35:36,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:36,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:35:36,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:35:36,268 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:36,477 INFO L93 Difference]: Finished difference Result 544 states and 787 transitions. [2021-11-19 04:35:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:35:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-11-19 04:35:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:36,481 INFO L225 Difference]: With dead ends: 544 [2021-11-19 04:35:36,481 INFO L226 Difference]: Without dead ends: 310 [2021-11-19 04:35:36,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:35:36,484 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 112 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:36,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 639 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-19 04:35:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2021-11-19 04:35:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 243 states have (on average 1.3045267489711934) internal successors, (317), 248 states have internal predecessors, (317), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-11-19 04:35:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 420 transitions. [2021-11-19 04:35:36,519 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 420 transitions. Word has length 43 [2021-11-19 04:35:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:36,519 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 420 transitions. [2021-11-19 04:35:36,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 420 transitions. [2021-11-19 04:35:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:35:36,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:36,522 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:36,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 04:35:36,522 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1967801604, now seen corresponding path program 1 times [2021-11-19 04:35:36,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:36,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032258361] [2021-11-19 04:35:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:36,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:36,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:35:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:36,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:36,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032258361] [2021-11-19 04:35:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032258361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:36,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:36,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:35:36,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588712014] [2021-11-19 04:35:36,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:36,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:35:36,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:35:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:35:36,694 INFO L87 Difference]: Start difference. First operand 302 states and 420 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:37,083 INFO L93 Difference]: Finished difference Result 333 states and 468 transitions. [2021-11-19 04:35:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:35:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-19 04:35:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:37,087 INFO L225 Difference]: With dead ends: 333 [2021-11-19 04:35:37,087 INFO L226 Difference]: Without dead ends: 310 [2021-11-19 04:35:37,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:35:37,089 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 77 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:37,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1287 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-19 04:35:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 301. [2021-11-19 04:35:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 242 states have (on average 1.3016528925619835) internal successors, (315), 247 states have internal predecessors, (315), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-11-19 04:35:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 418 transitions. [2021-11-19 04:35:37,118 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 418 transitions. Word has length 43 [2021-11-19 04:35:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:37,118 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 418 transitions. [2021-11-19 04:35:37,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 418 transitions. [2021-11-19 04:35:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:35:37,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:37,120 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1] [2021-11-19 04:35:37,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:35:37,120 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash -896869873, now seen corresponding path program 1 times [2021-11-19 04:35:37,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:37,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252957995] [2021-11-19 04:35:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:37,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:35:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:37,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:37,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:37,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252957995] [2021-11-19 04:35:37,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252957995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:37,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:37,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:35:37,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502867192] [2021-11-19 04:35:37,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:37,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:35:37,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:35:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:35:37,197 INFO L87 Difference]: Start difference. First operand 301 states and 418 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:37,455 INFO L93 Difference]: Finished difference Result 569 states and 825 transitions. [2021-11-19 04:35:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:35:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-11-19 04:35:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:37,458 INFO L225 Difference]: With dead ends: 569 [2021-11-19 04:35:37,459 INFO L226 Difference]: Without dead ends: 326 [2021-11-19 04:35:37,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:37,461 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 61 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:37,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1201 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-19 04:35:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 313. [2021-11-19 04:35:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 252 states have (on average 1.2936507936507937) internal successors, (326), 257 states have internal predecessors, (326), 44 states have call successors, (44), 15 states have call predecessors, (44), 16 states have return successors, (77), 40 states have call predecessors, (77), 38 states have call successors, (77) [2021-11-19 04:35:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 447 transitions. [2021-11-19 04:35:37,497 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 447 transitions. Word has length 48 [2021-11-19 04:35:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:37,498 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 447 transitions. [2021-11-19 04:35:37,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 447 transitions. [2021-11-19 04:35:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:35:37,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:37,499 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:35:37,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 04:35:37,500 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1018197871, now seen corresponding path program 1 times [2021-11-19 04:35:37,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:37,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869605346] [2021-11-19 04:35:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:37,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:35:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:37,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:37,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869605346] [2021-11-19 04:35:37,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869605346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:37,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:37,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:37,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094764156] [2021-11-19 04:35:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:37,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:37,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:37,631 INFO L87 Difference]: Start difference. First operand 313 states and 447 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:38,030 INFO L93 Difference]: Finished difference Result 315 states and 448 transitions. [2021-11-19 04:35:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:35:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-19 04:35:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:38,033 INFO L225 Difference]: With dead ends: 315 [2021-11-19 04:35:38,033 INFO L226 Difference]: Without dead ends: 282 [2021-11-19 04:35:38,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:35:38,034 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 66 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:38,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1244 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-19 04:35:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-19 04:35:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 224 states have (on average 1.3169642857142858) internal successors, (295), 228 states have internal predecessors, (295), 42 states have call successors, (42), 14 states have call predecessors, (42), 15 states have return successors, (76), 39 states have call predecessors, (76), 37 states have call successors, (76) [2021-11-19 04:35:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 413 transitions. [2021-11-19 04:35:38,061 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 413 transitions. Word has length 44 [2021-11-19 04:35:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 413 transitions. [2021-11-19 04:35:38,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:35:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 413 transitions. [2021-11-19 04:35:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:35:38,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:38,068 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-19 04:35:38,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 04:35:38,069 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1224484534, now seen corresponding path program 1 times [2021-11-19 04:35:38,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:38,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183928597] [2021-11-19 04:35:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:38,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:35:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:38,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:38,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183928597] [2021-11-19 04:35:38,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183928597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:38,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:38,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:35:38,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80799608] [2021-11-19 04:35:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:38,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:35:38,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:35:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:35:38,127 INFO L87 Difference]: Start difference. First operand 282 states and 413 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:38,379 INFO L93 Difference]: Finished difference Result 441 states and 673 transitions. [2021-11-19 04:35:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:35:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-19 04:35:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:38,384 INFO L225 Difference]: With dead ends: 441 [2021-11-19 04:35:38,385 INFO L226 Difference]: Without dead ends: 438 [2021-11-19 04:35:38,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:38,386 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 140 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:38,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 796 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-19 04:35:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2021-11-19 04:35:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 228 states have (on average 1.3201754385964912) internal successors, (301), 232 states have internal predecessors, (301), 42 states have call successors, (42), 14 states have call predecessors, (42), 15 states have return successors, (76), 39 states have call predecessors, (76), 37 states have call successors, (76) [2021-11-19 04:35:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 419 transitions. [2021-11-19 04:35:38,448 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 419 transitions. Word has length 49 [2021-11-19 04:35:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:38,449 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 419 transitions. [2021-11-19 04:35:38,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 419 transitions. [2021-11-19 04:35:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:35:38,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:38,450 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-19 04:35:38,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 04:35:38,451 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:38,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2015471348, now seen corresponding path program 1 times [2021-11-19 04:35:38,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:38,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093896696] [2021-11-19 04:35:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:38,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:35:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:38,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:38,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093896696] [2021-11-19 04:35:38,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093896696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:38,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:38,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:35:38,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777857482] [2021-11-19 04:35:38,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:38,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:35:38,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:35:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:35:38,508 INFO L87 Difference]: Start difference. First operand 286 states and 419 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:38,760 INFO L93 Difference]: Finished difference Result 658 states and 979 transitions. [2021-11-19 04:35:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:35:38,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-19 04:35:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:38,764 INFO L225 Difference]: With dead ends: 658 [2021-11-19 04:35:38,764 INFO L226 Difference]: Without dead ends: 405 [2021-11-19 04:35:38,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:35:38,767 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 214 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:38,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 543 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:38,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-19 04:35:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 373. [2021-11-19 04:35:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 297 states have (on average 1.2996632996632997) internal successors, (386), 302 states have internal predecessors, (386), 53 states have call successors, (53), 18 states have call predecessors, (53), 22 states have return successors, (96), 52 states have call predecessors, (96), 49 states have call successors, (96) [2021-11-19 04:35:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 535 transitions. [2021-11-19 04:35:38,803 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 535 transitions. Word has length 49 [2021-11-19 04:35:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:38,803 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 535 transitions. [2021-11-19 04:35:38,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:35:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 535 transitions. [2021-11-19 04:35:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:35:38,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:38,805 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:38,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 04:35:38,805 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash -726473774, now seen corresponding path program 1 times [2021-11-19 04:35:38,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:38,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231985821] [2021-11-19 04:35:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:38,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:38,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:38,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231985821] [2021-11-19 04:35:38,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231985821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:38,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:38,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:38,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016507912] [2021-11-19 04:35:38,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:38,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:38,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:38,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:38,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:38,967 INFO L87 Difference]: Start difference. First operand 373 states and 535 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:35:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:39,254 INFO L93 Difference]: Finished difference Result 691 states and 1016 transitions. [2021-11-19 04:35:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:35:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-19 04:35:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:39,258 INFO L225 Difference]: With dead ends: 691 [2021-11-19 04:35:39,259 INFO L226 Difference]: Without dead ends: 346 [2021-11-19 04:35:39,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:35:39,262 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 88 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:39,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1044 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-19 04:35:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-11-19 04:35:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 271 states have (on average 1.2767527675276753) internal successors, (346), 275 states have internal predecessors, (346), 52 states have call successors, (52), 18 states have call predecessors, (52), 22 states have return successors, (96), 52 states have call predecessors, (96), 49 states have call successors, (96) [2021-11-19 04:35:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 494 transitions. [2021-11-19 04:35:39,335 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 494 transitions. Word has length 50 [2021-11-19 04:35:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:39,335 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 494 transitions. [2021-11-19 04:35:39,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:35:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 494 transitions. [2021-11-19 04:35:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:35:39,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:39,337 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:39,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 04:35:39,337 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1339562411, now seen corresponding path program 1 times [2021-11-19 04:35:39,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:39,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884245707] [2021-11-19 04:35:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:39,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:39,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:39,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884245707] [2021-11-19 04:35:39,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884245707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:39,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:39,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:35:39,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974641072] [2021-11-19 04:35:39,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:39,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:35:39,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:35:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:35:39,465 INFO L87 Difference]: Start difference. First operand 346 states and 494 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:35:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:39,892 INFO L93 Difference]: Finished difference Result 659 states and 959 transitions. [2021-11-19 04:35:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:35:39,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2021-11-19 04:35:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:39,896 INFO L225 Difference]: With dead ends: 659 [2021-11-19 04:35:39,896 INFO L226 Difference]: Without dead ends: 341 [2021-11-19 04:35:39,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:35:39,899 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 232 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:39,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 841 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-19 04:35:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-11-19 04:35:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 267 states have (on average 1.2659176029962547) internal successors, (338), 271 states have internal predecessors, (338), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2021-11-19 04:35:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 481 transitions. [2021-11-19 04:35:39,937 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 481 transitions. Word has length 54 [2021-11-19 04:35:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:39,938 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 481 transitions. [2021-11-19 04:35:39,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:35:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 481 transitions. [2021-11-19 04:35:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:35:39,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:39,940 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:39,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 04:35:39,940 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash 330640549, now seen corresponding path program 1 times [2021-11-19 04:35:39,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:39,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385468869] [2021-11-19 04:35:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:39,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:40,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:40,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385468869] [2021-11-19 04:35:40,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385468869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:40,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:40,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:35:40,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695218119] [2021-11-19 04:35:40,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:40,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:35:40,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:40,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:35:40,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:35:40,026 INFO L87 Difference]: Start difference. First operand 341 states and 481 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:35:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:40,265 INFO L93 Difference]: Finished difference Result 666 states and 963 transitions. [2021-11-19 04:35:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:35:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-11-19 04:35:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:40,269 INFO L225 Difference]: With dead ends: 666 [2021-11-19 04:35:40,269 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 04:35:40,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:35:40,273 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 51 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:40,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 703 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:35:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 04:35:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2021-11-19 04:35:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 270 states have (on average 1.262962962962963) internal successors, (341), 274 states have internal predecessors, (341), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2021-11-19 04:35:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 484 transitions. [2021-11-19 04:35:40,314 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 484 transitions. Word has length 57 [2021-11-19 04:35:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:40,315 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 484 transitions. [2021-11-19 04:35:40,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:35:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 484 transitions. [2021-11-19 04:35:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:35:40,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:40,315 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:40,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 04:35:40,316 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash 942519397, now seen corresponding path program 1 times [2021-11-19 04:35:40,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:40,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626047387] [2021-11-19 04:35:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:40,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:40,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:40,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626047387] [2021-11-19 04:35:40,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626047387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:40,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:40,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:35:40,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489366839] [2021-11-19 04:35:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:40,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:35:40,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:35:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:35:40,497 INFO L87 Difference]: Start difference. First operand 344 states and 484 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:35:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:40,848 INFO L93 Difference]: Finished difference Result 662 states and 947 transitions. [2021-11-19 04:35:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:35:40,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-11-19 04:35:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:40,853 INFO L225 Difference]: With dead ends: 662 [2021-11-19 04:35:40,853 INFO L226 Difference]: Without dead ends: 347 [2021-11-19 04:35:40,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:40,856 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 46 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:40,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1353 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-19 04:35:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2021-11-19 04:35:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 270 states have (on average 1.2518518518518518) internal successors, (338), 274 states have internal predecessors, (338), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2021-11-19 04:35:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2021-11-19 04:35:40,912 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 57 [2021-11-19 04:35:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:40,913 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2021-11-19 04:35:40,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:35:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2021-11-19 04:35:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:35:40,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:40,916 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:40,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 04:35:40,916 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:40,917 INFO L85 PathProgramCache]: Analyzing trace with hash -146309345, now seen corresponding path program 1 times [2021-11-19 04:35:40,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:40,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706284243] [2021-11-19 04:35:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:40,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:35:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:41,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:41,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706284243] [2021-11-19 04:35:41,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706284243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:41,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:41,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:41,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671224743] [2021-11-19 04:35:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:41,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:41,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:41,042 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:35:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:41,543 INFO L93 Difference]: Finished difference Result 623 states and 870 transitions. [2021-11-19 04:35:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:35:41,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-11-19 04:35:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:41,547 INFO L225 Difference]: With dead ends: 623 [2021-11-19 04:35:41,547 INFO L226 Difference]: Without dead ends: 322 [2021-11-19 04:35:41,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:41,549 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 165 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:41,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1240 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-19 04:35:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 314. [2021-11-19 04:35:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 246 states have (on average 1.2560975609756098) internal successors, (309), 252 states have internal predecessors, (309), 49 states have call successors, (49), 18 states have call predecessors, (49), 18 states have return successors, (70), 43 states have call predecessors, (70), 46 states have call successors, (70) [2021-11-19 04:35:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 428 transitions. [2021-11-19 04:35:41,583 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 428 transitions. Word has length 68 [2021-11-19 04:35:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:41,584 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 428 transitions. [2021-11-19 04:35:41,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:35:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 428 transitions. [2021-11-19 04:35:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:35:41,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:41,585 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:41,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 04:35:41,586 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1989043251, now seen corresponding path program 1 times [2021-11-19 04:35:41,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:41,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014961673] [2021-11-19 04:35:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:41,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:35:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:41,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:41,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014961673] [2021-11-19 04:35:41,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014961673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:41,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:41,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 04:35:41,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321562731] [2021-11-19 04:35:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:41,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:35:41,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:35:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:35:41,824 INFO L87 Difference]: Start difference. First operand 314 states and 428 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:35:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:42,319 INFO L93 Difference]: Finished difference Result 350 states and 477 transitions. [2021-11-19 04:35:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:35:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2021-11-19 04:35:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:42,323 INFO L225 Difference]: With dead ends: 350 [2021-11-19 04:35:42,324 INFO L226 Difference]: Without dead ends: 329 [2021-11-19 04:35:42,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:35:42,325 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 126 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:42,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 2250 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-19 04:35:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2021-11-19 04:35:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 248 states have (on average 1.2540322580645162) internal successors, (311), 255 states have internal predecessors, (311), 49 states have call successors, (49), 18 states have call predecessors, (49), 19 states have return successors, (71), 43 states have call predecessors, (71), 46 states have call successors, (71) [2021-11-19 04:35:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 431 transitions. [2021-11-19 04:35:42,360 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 431 transitions. Word has length 73 [2021-11-19 04:35:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:42,361 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 431 transitions. [2021-11-19 04:35:42,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:35:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 431 transitions. [2021-11-19 04:35:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 04:35:42,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:42,363 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:42,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-19 04:35:42,363 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash -182846632, now seen corresponding path program 1 times [2021-11-19 04:35:42,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:42,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981832396] [2021-11-19 04:35:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:42,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:42,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:42,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:42,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:35:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:42,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:42,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981832396] [2021-11-19 04:35:42,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981832396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:42,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:42,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 04:35:42,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361840293] [2021-11-19 04:35:42,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:42,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:35:42,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:35:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:35:42,603 INFO L87 Difference]: Start difference. First operand 317 states and 431 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:35:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:43,164 INFO L93 Difference]: Finished difference Result 354 states and 481 transitions. [2021-11-19 04:35:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:35:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2021-11-19 04:35:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:43,175 INFO L225 Difference]: With dead ends: 354 [2021-11-19 04:35:43,176 INFO L226 Difference]: Without dead ends: 333 [2021-11-19 04:35:43,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:35:43,177 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 126 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:43,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2563 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-19 04:35:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 317. [2021-11-19 04:35:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 248 states have (on average 1.2540322580645162) internal successors, (311), 255 states have internal predecessors, (311), 49 states have call successors, (49), 18 states have call predecessors, (49), 19 states have return successors, (71), 43 states have call predecessors, (71), 46 states have call successors, (71) [2021-11-19 04:35:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 431 transitions. [2021-11-19 04:35:43,219 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 431 transitions. Word has length 74 [2021-11-19 04:35:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:43,220 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 431 transitions. [2021-11-19 04:35:43,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:35:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 431 transitions. [2021-11-19 04:35:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 04:35:43,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:43,227 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:43,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-19 04:35:43,227 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -673237615, now seen corresponding path program 1 times [2021-11-19 04:35:43,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:43,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921619874] [2021-11-19 04:35:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:43,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:43,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:43,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:43,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:43,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:35:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:43,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:35:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:43,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:43,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921619874] [2021-11-19 04:35:43,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921619874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:43,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:43,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 04:35:43,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332965068] [2021-11-19 04:35:43,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:43,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:35:43,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:35:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:35:43,485 INFO L87 Difference]: Start difference. First operand 317 states and 431 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 04:35:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:44,376 INFO L93 Difference]: Finished difference Result 468 states and 698 transitions. [2021-11-19 04:35:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:35:44,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-11-19 04:35:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:44,381 INFO L225 Difference]: With dead ends: 468 [2021-11-19 04:35:44,381 INFO L226 Difference]: Without dead ends: 429 [2021-11-19 04:35:44,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:35:44,383 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 194 mSDsluCounter, 2809 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:44,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 3052 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:35:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-19 04:35:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 413. [2021-11-19 04:35:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 316 states have (on average 1.2626582278481013) internal successors, (399), 327 states have internal predecessors, (399), 76 states have call successors, (76), 18 states have call predecessors, (76), 20 states have return successors, (110), 67 states have call predecessors, (110), 72 states have call successors, (110) [2021-11-19 04:35:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 585 transitions. [2021-11-19 04:35:44,431 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 585 transitions. Word has length 82 [2021-11-19 04:35:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:44,432 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 585 transitions. [2021-11-19 04:35:44,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 04:35:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 585 transitions. [2021-11-19 04:35:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 04:35:44,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:44,434 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:44,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-19 04:35:44,434 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -166689667, now seen corresponding path program 1 times [2021-11-19 04:35:44,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:44,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699237509] [2021-11-19 04:35:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:44,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:44,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:44,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:44,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:44,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:35:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:44,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:35:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:44,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:44,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699237509] [2021-11-19 04:35:44,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699237509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:44,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:44,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:35:44,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865167042] [2021-11-19 04:35:44,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:44,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:35:44,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:35:44,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:44,589 INFO L87 Difference]: Start difference. First operand 413 states and 585 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:35:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:45,092 INFO L93 Difference]: Finished difference Result 809 states and 1103 transitions. [2021-11-19 04:35:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:35:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 84 [2021-11-19 04:35:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:45,098 INFO L225 Difference]: With dead ends: 809 [2021-11-19 04:35:45,098 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 04:35:45,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:35:45,100 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 377 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:45,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1086 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 04:35:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 496. [2021-11-19 04:35:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.2532299741602067) internal successors, (485), 397 states have internal predecessors, (485), 79 states have call successors, (79), 25 states have call predecessors, (79), 29 states have return successors, (114), 73 states have call predecessors, (114), 75 states have call successors, (114) [2021-11-19 04:35:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 678 transitions. [2021-11-19 04:35:45,152 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 678 transitions. Word has length 84 [2021-11-19 04:35:45,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:45,152 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 678 transitions. [2021-11-19 04:35:45,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:35:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 678 transitions. [2021-11-19 04:35:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 04:35:45,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:45,154 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:45,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-19 04:35:45,155 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:45,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1602435204, now seen corresponding path program 1 times [2021-11-19 04:35:45,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:45,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700556973] [2021-11-19 04:35:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:45,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:45,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:45,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:45,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:45,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:35:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:45,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:35:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:45,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:45,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700556973] [2021-11-19 04:35:45,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700556973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:45,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:45,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:35:45,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534872252] [2021-11-19 04:35:45,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:45,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:35:45,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:45,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:35:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:45,313 INFO L87 Difference]: Start difference. First operand 496 states and 678 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:35:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:45,921 INFO L93 Difference]: Finished difference Result 867 states and 1198 transitions. [2021-11-19 04:35:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:35:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 84 [2021-11-19 04:35:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:45,926 INFO L225 Difference]: With dead ends: 867 [2021-11-19 04:35:45,926 INFO L226 Difference]: Without dead ends: 496 [2021-11-19 04:35:45,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:35:45,929 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 447 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:45,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 713 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-19 04:35:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2021-11-19 04:35:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.248062015503876) internal successors, (483), 397 states have internal predecessors, (483), 79 states have call successors, (79), 25 states have call predecessors, (79), 29 states have return successors, (106), 73 states have call predecessors, (106), 75 states have call successors, (106) [2021-11-19 04:35:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 668 transitions. [2021-11-19 04:35:45,980 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 668 transitions. Word has length 84 [2021-11-19 04:35:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:45,981 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 668 transitions. [2021-11-19 04:35:45,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:35:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 668 transitions. [2021-11-19 04:35:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 04:35:45,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:45,983 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:45,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-19 04:35:45,983 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash 716383564, now seen corresponding path program 1 times [2021-11-19 04:35:45,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:45,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485250058] [2021-11-19 04:35:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:45,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:35:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:35:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:46,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:46,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485250058] [2021-11-19 04:35:46,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485250058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:46,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:46,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 04:35:46,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879127136] [2021-11-19 04:35:46,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:46,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:35:46,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:35:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:35:46,262 INFO L87 Difference]: Start difference. First operand 496 states and 668 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 04:35:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:47,106 INFO L93 Difference]: Finished difference Result 657 states and 955 transitions. [2021-11-19 04:35:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:35:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2021-11-19 04:35:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:47,112 INFO L225 Difference]: With dead ends: 657 [2021-11-19 04:35:47,112 INFO L226 Difference]: Without dead ends: 610 [2021-11-19 04:35:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:35:47,114 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 249 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:47,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 2791 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:35:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-19 04:35:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 493. [2021-11-19 04:35:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 385 states have (on average 1.2493506493506494) internal successors, (481), 394 states have internal predecessors, (481), 79 states have call successors, (79), 25 states have call predecessors, (79), 28 states have return successors, (105), 73 states have call predecessors, (105), 75 states have call successors, (105) [2021-11-19 04:35:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 665 transitions. [2021-11-19 04:35:47,170 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 665 transitions. Word has length 83 [2021-11-19 04:35:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:47,170 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 665 transitions. [2021-11-19 04:35:47,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 04:35:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 665 transitions. [2021-11-19 04:35:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 04:35:47,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:47,172 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:47,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-19 04:35:47,173 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash 971177342, now seen corresponding path program 1 times [2021-11-19 04:35:47,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:47,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215807085] [2021-11-19 04:35:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:47,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:47,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:47,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:47,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:47,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:35:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:47,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:35:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:47,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:47,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215807085] [2021-11-19 04:35:47,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215807085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:47,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:47,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-19 04:35:47,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264582306] [2021-11-19 04:35:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:47,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:35:47,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:35:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:47,370 INFO L87 Difference]: Start difference. First operand 493 states and 665 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:35:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:48,263 INFO L93 Difference]: Finished difference Result 965 states and 1304 transitions. [2021-11-19 04:35:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:35:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-11-19 04:35:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:48,272 INFO L225 Difference]: With dead ends: 965 [2021-11-19 04:35:48,272 INFO L226 Difference]: Without dead ends: 931 [2021-11-19 04:35:48,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:35:48,274 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 366 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:48,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 2289 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:35:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-11-19 04:35:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 585. [2021-11-19 04:35:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 461 states have (on average 1.2190889370932756) internal successors, (562), 473 states have internal predecessors, (562), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (115), 80 states have call predecessors, (115), 81 states have call successors, (115) [2021-11-19 04:35:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 762 transitions. [2021-11-19 04:35:48,349 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 762 transitions. Word has length 84 [2021-11-19 04:35:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:48,349 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 762 transitions. [2021-11-19 04:35:48,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:35:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 762 transitions. [2021-11-19 04:35:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 04:35:48,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:48,352 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:48,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-19 04:35:48,352 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:48,352 INFO L85 PathProgramCache]: Analyzing trace with hash -171325124, now seen corresponding path program 1 times [2021-11-19 04:35:48,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:48,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165316295] [2021-11-19 04:35:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:48,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:35:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:35:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:48,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:48,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165316295] [2021-11-19 04:35:48,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165316295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:48,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:48,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-19 04:35:48,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258416216] [2021-11-19 04:35:48,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:48,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:35:48,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:35:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:48,590 INFO L87 Difference]: Start difference. First operand 585 states and 762 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:35:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:49,474 INFO L93 Difference]: Finished difference Result 952 states and 1287 transitions. [2021-11-19 04:35:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:35:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-11-19 04:35:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:49,482 INFO L225 Difference]: With dead ends: 952 [2021-11-19 04:35:49,482 INFO L226 Difference]: Without dead ends: 918 [2021-11-19 04:35:49,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:35:49,486 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 287 mSDsluCounter, 2857 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 3204 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:49,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 3204 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:35:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-19 04:35:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 468. [2021-11-19 04:35:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 366 states have (on average 1.2486338797814207) internal successors, (457), 375 states have internal predecessors, (457), 75 states have call successors, (75), 23 states have call predecessors, (75), 26 states have return successors, (100), 69 states have call predecessors, (100), 71 states have call successors, (100) [2021-11-19 04:35:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 632 transitions. [2021-11-19 04:35:49,547 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 632 transitions. Word has length 84 [2021-11-19 04:35:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:49,547 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 632 transitions. [2021-11-19 04:35:49,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:35:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 632 transitions. [2021-11-19 04:35:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 04:35:49,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:49,550 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:49,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-19 04:35:49,550 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1715684878, now seen corresponding path program 1 times [2021-11-19 04:35:49,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:49,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492738044] [2021-11-19 04:35:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:49,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:35:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:35:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:35:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:49,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:49,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492738044] [2021-11-19 04:35:49,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492738044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:49,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:49,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 04:35:49,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696427419] [2021-11-19 04:35:49,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:35:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:35:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:35:49,798 INFO L87 Difference]: Start difference. First operand 468 states and 632 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:35:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:51,018 INFO L93 Difference]: Finished difference Result 932 states and 1258 transitions. [2021-11-19 04:35:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:35:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-11-19 04:35:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:51,025 INFO L225 Difference]: With dead ends: 932 [2021-11-19 04:35:51,026 INFO L226 Difference]: Without dead ends: 885 [2021-11-19 04:35:51,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 04:35:51,028 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 479 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:51,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 2367 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:35:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-19 04:35:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 858. [2021-11-19 04:35:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 666 states have (on average 1.2147147147147148) internal successors, (809), 684 states have internal predecessors, (809), 142 states have call successors, (142), 43 states have call predecessors, (142), 49 states have return successors, (185), 130 states have call predecessors, (185), 137 states have call successors, (185) [2021-11-19 04:35:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1136 transitions. [2021-11-19 04:35:51,128 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1136 transitions. Word has length 93 [2021-11-19 04:35:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:51,131 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1136 transitions. [2021-11-19 04:35:51,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:35:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1136 transitions. [2021-11-19 04:35:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 04:35:51,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:51,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:51,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-19 04:35:51,137 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash 327002288, now seen corresponding path program 1 times [2021-11-19 04:35:51,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:51,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121400488] [2021-11-19 04:35:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:51,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:35:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:35:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:35:51,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:51,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121400488] [2021-11-19 04:35:51,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121400488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:51,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:51,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:35:51,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055547874] [2021-11-19 04:35:51,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:51,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:35:51,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:35:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:51,298 INFO L87 Difference]: Start difference. First operand 858 states and 1136 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:35:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:51,812 INFO L93 Difference]: Finished difference Result 1692 states and 2335 transitions. [2021-11-19 04:35:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:35:51,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 95 [2021-11-19 04:35:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:51,823 INFO L225 Difference]: With dead ends: 1692 [2021-11-19 04:35:51,823 INFO L226 Difference]: Without dead ends: 1142 [2021-11-19 04:35:51,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:51,827 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 206 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:51,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1437 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-11-19 04:35:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 834. [2021-11-19 04:35:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 650 states have (on average 1.1953846153846155) internal successors, (777), 664 states have internal predecessors, (777), 134 states have call successors, (134), 43 states have call predecessors, (134), 49 states have return successors, (173), 126 states have call predecessors, (173), 129 states have call successors, (173) [2021-11-19 04:35:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1084 transitions. [2021-11-19 04:35:51,961 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1084 transitions. Word has length 95 [2021-11-19 04:35:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:51,961 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1084 transitions. [2021-11-19 04:35:51,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:35:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1084 transitions. [2021-11-19 04:35:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 04:35:51,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:51,964 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:51,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-19 04:35:51,965 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1808548852, now seen corresponding path program 1 times [2021-11-19 04:35:51,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:51,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319897824] [2021-11-19 04:35:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:51,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:35:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:35:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:35:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:52,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:52,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319897824] [2021-11-19 04:35:52,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319897824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:52,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:52,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-19 04:35:52,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037991720] [2021-11-19 04:35:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:52,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:35:52,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:35:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:35:52,179 INFO L87 Difference]: Start difference. First operand 834 states and 1084 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:35:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:53,651 INFO L93 Difference]: Finished difference Result 858 states and 1116 transitions. [2021-11-19 04:35:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:35:53,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-11-19 04:35:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:53,658 INFO L225 Difference]: With dead ends: 858 [2021-11-19 04:35:53,658 INFO L226 Difference]: Without dead ends: 809 [2021-11-19 04:35:53,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 04:35:53,660 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 330 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 3627 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:53,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 3627 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2119 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:35:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-11-19 04:35:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 306. [2021-11-19 04:35:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 247 states have internal predecessors, (275), 41 states have call successors, (41), 21 states have call predecessors, (41), 22 states have return successors, (48), 37 states have call predecessors, (48), 38 states have call successors, (48) [2021-11-19 04:35:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 364 transitions. [2021-11-19 04:35:53,708 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 364 transitions. Word has length 93 [2021-11-19 04:35:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:53,708 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 364 transitions. [2021-11-19 04:35:53,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 04:35:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 364 transitions. [2021-11-19 04:35:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 04:35:53,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:53,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:53,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-19 04:35:53,711 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 46403579, now seen corresponding path program 1 times [2021-11-19 04:35:53,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:53,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718291492] [2021-11-19 04:35:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:53,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:35:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:35:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:35:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 04:35:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 04:35:53,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:53,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718291492] [2021-11-19 04:35:53,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718291492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:35:53,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358489760] [2021-11-19 04:35:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:53,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:35:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:35:53,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:35:53,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:35:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:35:54,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:35:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:35:54,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:35:54,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358489760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:54,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:35:54,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-11-19 04:35:54,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234238400] [2021-11-19 04:35:54,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:54,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:54,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:54,479 INFO L87 Difference]: Start difference. First operand 306 states and 364 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:35:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:54,562 INFO L93 Difference]: Finished difference Result 513 states and 620 transitions. [2021-11-19 04:35:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:35:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 133 [2021-11-19 04:35:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:54,565 INFO L225 Difference]: With dead ends: 513 [2021-11-19 04:35:54,566 INFO L226 Difference]: Without dead ends: 327 [2021-11-19 04:35:54,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:54,567 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 12 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:54,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 720 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:35:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-19 04:35:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 322. [2021-11-19 04:35:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 256 states have (on average 1.12890625) internal successors, (289), 262 states have internal predecessors, (289), 41 states have call successors, (41), 21 states have call predecessors, (41), 24 states have return successors, (55), 38 states have call predecessors, (55), 38 states have call successors, (55) [2021-11-19 04:35:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 385 transitions. [2021-11-19 04:35:54,611 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 385 transitions. Word has length 133 [2021-11-19 04:35:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:54,612 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 385 transitions. [2021-11-19 04:35:54,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:35:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 385 transitions. [2021-11-19 04:35:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 04:35:54,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:54,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:54,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:35:54,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d9abeb3-af61-46c8-b4bd-4c00e20da35a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-19 04:35:54,831 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1067504510, now seen corresponding path program 1 times [2021-11-19 04:35:54,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:54,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942682899] [2021-11-19 04:35:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:54,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:35:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:35:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:35:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:54,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-19 04:35:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 04:35:55,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:55,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942682899] [2021-11-19 04:35:55,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942682899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:55,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:55,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:35:55,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751731475] [2021-11-19 04:35:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:55,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:35:55,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:35:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:55,012 INFO L87 Difference]: Start difference. First operand 322 states and 385 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:35:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:55,512 INFO L93 Difference]: Finished difference Result 534 states and 639 transitions. [2021-11-19 04:35:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:35:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 134 [2021-11-19 04:35:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:55,515 INFO L225 Difference]: With dead ends: 534 [2021-11-19 04:35:55,515 INFO L226 Difference]: Without dead ends: 362 [2021-11-19 04:35:55,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:55,517 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 124 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:55,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1184 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-19 04:35:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 315. [2021-11-19 04:35:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 251 states have (on average 1.1155378486055776) internal successors, (280), 256 states have internal predecessors, (280), 39 states have call successors, (39), 21 states have call predecessors, (39), 24 states have return successors, (51), 37 states have call predecessors, (51), 36 states have call successors, (51) [2021-11-19 04:35:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 370 transitions. [2021-11-19 04:35:55,559 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 370 transitions. Word has length 134 [2021-11-19 04:35:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:55,560 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 370 transitions. [2021-11-19 04:35:55,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:35:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 370 transitions. [2021-11-19 04:35:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 04:35:55,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:55,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-19 04:35:55,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-19 04:35:55,564 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:55,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1031777441, now seen corresponding path program 1 times [2021-11-19 04:35:55,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:55,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412255416] [2021-11-19 04:35:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:55,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:35:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:35:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:35:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-19 04:35:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-19 04:35:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:35:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-19 04:35:55,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:55,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412255416] [2021-11-19 04:35:55,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412255416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:55,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:35:55,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315053863] [2021-11-19 04:35:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:35:55,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:35:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:55,756 INFO L87 Difference]: Start difference. First operand 315 states and 370 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:35:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:56,213 INFO L93 Difference]: Finished difference Result 384 states and 451 transitions. [2021-11-19 04:35:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:35:56,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 170 [2021-11-19 04:35:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:56,217 INFO L225 Difference]: With dead ends: 384 [2021-11-19 04:35:56,218 INFO L226 Difference]: Without dead ends: 317 [2021-11-19 04:35:56,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:56,219 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 91 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:56,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1087 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:35:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-19 04:35:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 217. [2021-11-19 04:35:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 176 states have (on average 1.1136363636363635) internal successors, (196), 178 states have internal predecessors, (196), 24 states have call successors, (24), 14 states have call predecessors, (24), 16 states have return successors, (30), 24 states have call predecessors, (30), 22 states have call successors, (30) [2021-11-19 04:35:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 250 transitions. [2021-11-19 04:35:56,252 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 250 transitions. Word has length 170 [2021-11-19 04:35:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:56,253 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 250 transitions. [2021-11-19 04:35:56,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:35:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 250 transitions. [2021-11-19 04:35:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 04:35:56,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:56,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-19 04:35:56,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-19 04:35:56,257 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1337713774, now seen corresponding path program 1 times [2021-11-19 04:35:56,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:56,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77260947] [2021-11-19 04:35:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:56,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:35:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:35:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:35:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:35:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:35:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-19 04:35:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-19 04:35:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:35:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:35:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:35:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-19 04:35:56,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:56,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77260947] [2021-11-19 04:35:56,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77260947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:56,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:56,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:35:56,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895210808] [2021-11-19 04:35:56,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:56,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:35:56,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:35:56,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:35:56,485 INFO L87 Difference]: Start difference. First operand 217 states and 250 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:35:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:56,837 INFO L93 Difference]: Finished difference Result 223 states and 259 transitions. [2021-11-19 04:35:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:35:56,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 173 [2021-11-19 04:35:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:56,839 INFO L225 Difference]: With dead ends: 223 [2021-11-19 04:35:56,839 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 04:35:56,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:35:56,840 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 121 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:56,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 698 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:35:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 04:35:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 04:35:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:35:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 04:35:56,842 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2021-11-19 04:35:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:56,842 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 04:35:56,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:35:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 04:35:56,843 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 04:35:56,845 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 04:35:56,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-19 04:35:56,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 04:38:15,233 WARN L227 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 119 DAG size of output: 115 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 04:40:11,575 WARN L227 SmtUtils]: Spent 1.94m on a formula simplification. DAG size of input: 119 DAG size of output: 115 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 04:42:07,682 WARN L227 SmtUtils]: Spent 1.90m on a formula simplification. DAG size of input: 119 DAG size of output: 115 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 04:44:06,020 WARN L227 SmtUtils]: Spent 1.91m on a formula simplification. DAG size of input: 119 DAG size of output: 115 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 04:46:03,770 WARN L227 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 119 DAG size of output: 115 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 04:48:06,079 WARN L227 SmtUtils]: Spent 2.00m on a formula simplification. DAG size of input: 119 DAG size of output: 115 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)