./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.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_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/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_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/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_9aa6d236-881d-4b41-864e-4bee6aa896ab/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 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:51:32,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:51:32,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:51:32,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:51:32,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:51:32,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:51:32,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:51:32,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:51:32,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:51:32,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:51:32,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:51:32,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:51:32,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:51:32,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:51:32,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:51:32,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:51:32,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:51:32,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:51:32,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:51:32,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:51:32,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:51:32,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:51:32,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:51:32,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:51:32,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:51:32,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:51:32,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:51:32,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:51:32,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:51:32,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:51:32,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:51:32,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:51:32,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:51:32,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:51:32,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:51:32,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:51:32,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:51:32,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:51:32,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:51:32,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:51:32,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:51:32,360 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:51:32,413 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:51:32,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:51:32,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:51:32,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:51:32,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:51:32,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:51:32,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:51:32,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:51:32,426 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:51:32,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:51:32,428 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:51:32,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:51:32,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:51:32,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:51:32,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:51:32,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:51:32,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:51:32,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:51:32,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:51:32,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:51:32,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:51:32,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:51:32,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:51:32,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:51:32,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:51:32,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:51:32,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:51:32,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:51:32,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:51:32,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:51:32,435 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:51:32,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:51:32,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:51:32,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:51:32,436 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_9aa6d236-881d-4b41-864e-4bee6aa896ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe [2021-11-19 04:51:32,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:51:32,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:51:32,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:51:32,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:51:32,791 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:51:32,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2021-11-19 04:51:32,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/data/21d4ac9e3/b2b21cb925c2446b9d6f84daaaf097b5/FLAG38f58870b [2021-11-19 04:51:33,547 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:51:33,548 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2021-11-19 04:51:33,581 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/data/21d4ac9e3/b2b21cb925c2446b9d6f84daaaf097b5/FLAG38f58870b [2021-11-19 04:51:33,739 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/data/21d4ac9e3/b2b21cb925c2446b9d6f84daaaf097b5 [2021-11-19 04:51:33,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:51:33,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:51:33,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:51:33,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:51:33,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:51:33,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:33" (1/1) ... [2021-11-19 04:51:33,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9dc3aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:33, skipping insertion in model container [2021-11-19 04:51:33,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:33" (1/1) ... [2021-11-19 04:51:33,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:51:33,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:51:34,133 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_9aa6d236-881d-4b41-864e-4bee6aa896ab/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2021-11-19 04:51:34,394 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:51:34,418 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:51:34,464 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_9aa6d236-881d-4b41-864e-4bee6aa896ab/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2021-11-19 04:51:34,633 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:51:34,656 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:51:34,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34 WrapperNode [2021-11-19 04:51:34,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:51:34,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:51:34,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:51:34,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:51:34,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,789 INFO L137 Inliner]: procedures = 41, calls = 107, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 1581 [2021-11-19 04:51:34,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:51:34,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:51:34,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:51:34,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:51:34,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:51:34,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:51:34,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:51:34,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:51:34,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (1/1) ... [2021-11-19 04:51:34,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:51:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:34,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:51:34,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:51:35,043 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-11-19 04:51:35,044 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-11-19 04:51:35,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:51:35,045 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2021-11-19 04:51:35,045 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2021-11-19 04:51:35,045 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-11-19 04:51:35,045 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-11-19 04:51:35,047 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-11-19 04:51:35,048 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-11-19 04:51:35,048 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-11-19 04:51:35,048 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-11-19 04:51:35,048 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-11-19 04:51:35,049 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-11-19 04:51:35,049 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-11-19 04:51:35,049 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-11-19 04:51:35,049 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-11-19 04:51:35,049 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-11-19 04:51:35,050 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-11-19 04:51:35,050 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-11-19 04:51:35,050 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-11-19 04:51:35,050 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-11-19 04:51:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:51:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-11-19 04:51:35,051 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-11-19 04:51:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-11-19 04:51:35,051 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-11-19 04:51:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:51:35,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:51:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-11-19 04:51:35,052 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-11-19 04:51:35,335 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:51:35,340 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:51:35,495 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,566 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-11-19 04:51:35,566 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-11-19 04:51:35,693 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,723 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-11-19 04:51:35,723 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-11-19 04:51:35,740 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,741 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,746 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,773 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,800 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,805 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:35,810 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:51:36,712 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: CdAudioPnp_#res#1 := 0; [2021-11-19 04:51:36,712 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume !false; [2021-11-19 04:51:36,712 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##257: assume false; [2021-11-19 04:51:36,713 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##286: assume !false; [2021-11-19 04:51:36,713 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##285: assume false; [2021-11-19 04:51:36,713 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2021-11-19 04:51:36,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2021-11-19 04:51:36,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##133: assume false; [2021-11-19 04:51:36,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##134: assume !false; [2021-11-19 04:51:36,714 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2021-11-19 04:51:36,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2021-11-19 04:51:36,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-11-19 04:51:36,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-11-19 04:51:36,715 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##331: assume false; [2021-11-19 04:51:36,716 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##332: assume !false; [2021-11-19 04:51:36,764 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:51:36,781 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:51:36,782 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:51:36,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:36 BoogieIcfgContainer [2021-11-19 04:51:36,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:51:36,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:51:36,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:51:36,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:51:36,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:51:33" (1/3) ... [2021-11-19 04:51:36,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fcc4891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:36, skipping insertion in model container [2021-11-19 04:51:36,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:34" (2/3) ... [2021-11-19 04:51:36,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fcc4891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:36, skipping insertion in model container [2021-11-19 04:51:36,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:36" (3/3) ... [2021-11-19 04:51:36,797 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2021-11-19 04:51:36,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:51:36,804 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:51:36,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:51:36,879 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 04:51:36,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:51:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 04:51:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:51:36,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:36,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:36,925 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1469618272, now seen corresponding path program 1 times [2021-11-19 04:51:36,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:36,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886776696] [2021-11-19 04:51:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:36,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:37,176 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 04:51:37,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:37,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886776696] [2021-11-19 04:51:37,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886776696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:37,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:37,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:51:37,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384388392] [2021-11-19 04:51:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:37,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:51:37,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:51:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:51:37,229 INFO L87 Difference]: Start difference. First operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) 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 04:51:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:37,549 INFO L93 Difference]: Finished difference Result 809 states and 1294 transitions. [2021-11-19 04:51:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:51:37,552 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 04:51:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:37,582 INFO L225 Difference]: With dead ends: 809 [2021-11-19 04:51:37,582 INFO L226 Difference]: Without dead ends: 461 [2021-11-19 04:51:37,597 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 04:51:37,605 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 8 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:37,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1351 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:51:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-19 04:51:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2021-11-19 04:51:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 362 states have (on average 1.4751381215469612) internal successors, (534), 378 states have internal predecessors, (534), 86 states have call successors, (86), 13 states have call predecessors, (86), 12 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-11-19 04:51:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 691 transitions. [2021-11-19 04:51:37,738 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 691 transitions. Word has length 13 [2021-11-19 04:51:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:37,738 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 691 transitions. [2021-11-19 04:51:37,739 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 04:51:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 691 transitions. [2021-11-19 04:51:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:51:37,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:37,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:37,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:51:37,742 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1712840026, now seen corresponding path program 1 times [2021-11-19 04:51:37,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:37,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984889501] [2021-11-19 04:51:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:37,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:37,833 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 04:51:37,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:37,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984889501] [2021-11-19 04:51:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984889501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:37,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:37,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:51:37,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838664383] [2021-11-19 04:51:37,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:37,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:51:37,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:51:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:51:37,837 INFO L87 Difference]: Start difference. First operand 461 states and 691 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:51:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:38,124 INFO L93 Difference]: Finished difference Result 702 states and 1030 transitions. [2021-11-19 04:51:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:51:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2021-11-19 04:51:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:38,136 INFO L225 Difference]: With dead ends: 702 [2021-11-19 04:51:38,137 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 04:51:38,143 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 04:51:38,146 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 566 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:38,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1038 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:51:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 04:51:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 579. [2021-11-19 04:51:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 466 states have (on average 1.4356223175965666) internal successors, (669), 468 states have internal predecessors, (669), 92 states have call successors, (92), 21 states have call predecessors, (92), 20 states have return successors, (97), 91 states have call predecessors, (97), 81 states have call successors, (97) [2021-11-19 04:51:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 858 transitions. [2021-11-19 04:51:38,206 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 858 transitions. Word has length 15 [2021-11-19 04:51:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:38,207 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 858 transitions. [2021-11-19 04:51:38,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:51:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 858 transitions. [2021-11-19 04:51:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:51:38,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:38,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:38,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:51:38,213 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1723202730, now seen corresponding path program 1 times [2021-11-19 04:51:38,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:38,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009793681] [2021-11-19 04:51:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:38,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:38,341 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 04:51:38,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:38,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009793681] [2021-11-19 04:51:38,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009793681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:38,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:38,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:51:38,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314769293] [2021-11-19 04:51:38,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:38,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:51:38,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:51:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:51:38,352 INFO L87 Difference]: Start difference. First operand 579 states and 858 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 04:51:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:38,464 INFO L93 Difference]: Finished difference Result 858 states and 1241 transitions. [2021-11-19 04:51:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:51:38,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 19 [2021-11-19 04:51:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:38,481 INFO L225 Difference]: With dead ends: 858 [2021-11-19 04:51:38,482 INFO L226 Difference]: Without dead ends: 723 [2021-11-19 04:51:38,483 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 04:51:38,493 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 605 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:38,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 853 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:51:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-19 04:51:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 687. [2021-11-19 04:51:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 564 states have (on average 1.4326241134751774) internal successors, (808), 562 states have internal predecessors, (808), 93 states have call successors, (93), 26 states have call predecessors, (93), 29 states have return successors, (110), 98 states have call predecessors, (110), 85 states have call successors, (110) [2021-11-19 04:51:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1011 transitions. [2021-11-19 04:51:38,590 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1011 transitions. Word has length 19 [2021-11-19 04:51:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:38,591 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1011 transitions. [2021-11-19 04:51:38,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 04:51:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1011 transitions. [2021-11-19 04:51:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:51:38,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:38,601 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] [2021-11-19 04:51:38,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:51:38,602 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash 981092466, now seen corresponding path program 1 times [2021-11-19 04:51:38,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:38,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595542133] [2021-11-19 04:51:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:38,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:38,722 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 04:51:38,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:38,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595542133] [2021-11-19 04:51:38,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595542133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:38,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:38,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:51:38,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512047414] [2021-11-19 04:51:38,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:38,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:51:38,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:51:38,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:51:38,727 INFO L87 Difference]: Start difference. First operand 687 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 04:51:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:38,989 INFO L93 Difference]: Finished difference Result 1290 states and 1958 transitions. [2021-11-19 04:51:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:51:38,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 21 [2021-11-19 04:51:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:39,004 INFO L225 Difference]: With dead ends: 1290 [2021-11-19 04:51:39,005 INFO L226 Difference]: Without dead ends: 1057 [2021-11-19 04:51:39,008 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 04:51:39,019 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 338 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:39,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1622 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:51:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-11-19 04:51:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 819. [2021-11-19 04:51:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 673 states have (on average 1.4338781575037147) internal successors, (965), 670 states have internal predecessors, (965), 106 states have call successors, (106), 34 states have call predecessors, (106), 39 states have return successors, (172), 114 states have call predecessors, (172), 98 states have call successors, (172) [2021-11-19 04:51:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1243 transitions. [2021-11-19 04:51:39,135 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1243 transitions. Word has length 21 [2021-11-19 04:51:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:39,136 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1243 transitions. [2021-11-19 04:51:39,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 04:51:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1243 transitions. [2021-11-19 04:51:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:51:39,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:39,139 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] [2021-11-19 04:51:39,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:51:39,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:39,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:39,141 INFO L85 PathProgramCache]: Analyzing trace with hash 110549048, now seen corresponding path program 1 times [2021-11-19 04:51:39,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:39,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145379430] [2021-11-19 04:51:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:39,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:39,302 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 04:51:39,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:39,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145379430] [2021-11-19 04:51:39,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145379430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:39,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:39,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:39,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490391343] [2021-11-19 04:51:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:39,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:39,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:39,306 INFO L87 Difference]: Start difference. First operand 819 states and 1243 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:51:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:39,905 INFO L93 Difference]: Finished difference Result 1372 states and 2088 transitions. [2021-11-19 04:51:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:51:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 22 [2021-11-19 04:51:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:39,914 INFO L225 Difference]: With dead ends: 1372 [2021-11-19 04:51:39,914 INFO L226 Difference]: Without dead ends: 829 [2021-11-19 04:51:39,917 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 04:51:39,918 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 1027 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:39,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 869 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:51:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-19 04:51:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 807. [2021-11-19 04:51:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 663 states have (on average 1.4283559577677225) internal successors, (947), 660 states have internal predecessors, (947), 104 states have call successors, (104), 32 states have call predecessors, (104), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2021-11-19 04:51:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1219 transitions. [2021-11-19 04:51:40,027 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1219 transitions. Word has length 22 [2021-11-19 04:51:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:40,028 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1219 transitions. [2021-11-19 04:51:40,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:51:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1219 transitions. [2021-11-19 04:51:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:51:40,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:40,033 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] [2021-11-19 04:51:40,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:51:40,033 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -401986644, now seen corresponding path program 1 times [2021-11-19 04:51:40,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:40,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24377281] [2021-11-19 04:51:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:40,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:40,131 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 04:51:40,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:40,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24377281] [2021-11-19 04:51:40,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24377281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:40,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:40,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:51:40,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728059770] [2021-11-19 04:51:40,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:40,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:51:40,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:40,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:51:40,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:51:40,135 INFO L87 Difference]: Start difference. First operand 807 states and 1219 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 04:51:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:40,244 INFO L93 Difference]: Finished difference Result 810 states and 1221 transitions. [2021-11-19 04:51:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:51:40,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 23 [2021-11-19 04:51:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:40,252 INFO L225 Difference]: With dead ends: 810 [2021-11-19 04:51:40,253 INFO L226 Difference]: Without dead ends: 806 [2021-11-19 04:51:40,254 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 04:51:40,254 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 22 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:40,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1252 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:51:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-19 04:51:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2021-11-19 04:51:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 663 states have (on average 1.4253393665158371) internal successors, (945), 659 states have internal predecessors, (945), 103 states have call successors, (103), 32 states have call predecessors, (103), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2021-11-19 04:51:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1216 transitions. [2021-11-19 04:51:40,322 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1216 transitions. Word has length 23 [2021-11-19 04:51:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:40,323 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1216 transitions. [2021-11-19 04:51:40,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 04:51:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1216 transitions. [2021-11-19 04:51:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:51:40,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:40,326 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 04:51:40,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:51:40,327 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:40,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1420935661, now seen corresponding path program 1 times [2021-11-19 04:51:40,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:40,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898880355] [2021-11-19 04:51:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:40,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:40,391 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 04:51:40,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:40,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898880355] [2021-11-19 04:51:40,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898880355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:40,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:40,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:40,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057637758] [2021-11-19 04:51:40,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:40,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:40,394 INFO L87 Difference]: Start difference. First operand 806 states and 1216 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 04:51:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:40,580 INFO L93 Difference]: Finished difference Result 1220 states and 1776 transitions. [2021-11-19 04:51:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:51:40,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 28 [2021-11-19 04:51:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:40,588 INFO L225 Difference]: With dead ends: 1220 [2021-11-19 04:51:40,589 INFO L226 Difference]: Without dead ends: 806 [2021-11-19 04:51:40,591 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 04:51:40,592 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 318 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:40,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1941 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:51:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-19 04:51:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 681. [2021-11-19 04:51:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 559 states have (on average 1.407871198568873) internal successors, (787), 557 states have internal predecessors, (787), 88 states have call successors, (88), 28 states have call predecessors, (88), 33 states have return successors, (109), 95 states have call predecessors, (109), 81 states have call successors, (109) [2021-11-19 04:51:40,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 984 transitions. [2021-11-19 04:51:40,653 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 984 transitions. Word has length 28 [2021-11-19 04:51:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:40,654 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 984 transitions. [2021-11-19 04:51:40,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 04:51:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 984 transitions. [2021-11-19 04:51:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:51:40,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:40,658 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 04:51:40,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:51:40,659 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1565251403, now seen corresponding path program 1 times [2021-11-19 04:51:40,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:40,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526376211] [2021-11-19 04:51:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:40,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:40,709 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 04:51:40,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526376211] [2021-11-19 04:51:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526376211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:40,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:40,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:51:40,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832210302] [2021-11-19 04:51:40,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:40,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:51:40,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:51:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:51:40,713 INFO L87 Difference]: Start difference. First operand 681 states and 984 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:40,784 INFO L93 Difference]: Finished difference Result 764 states and 1091 transitions. [2021-11-19 04:51:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:51:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-19 04:51:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:40,792 INFO L225 Difference]: With dead ends: 764 [2021-11-19 04:51:40,793 INFO L226 Difference]: Without dead ends: 746 [2021-11-19 04:51:40,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 04:51:40,795 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 628 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:40,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 716 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:51:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-11-19 04:51:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 703. [2021-11-19 04:51:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 579 states have (on average 1.4162348877374784) internal successors, (820), 584 states have internal predecessors, (820), 88 states have call successors, (88), 29 states have call predecessors, (88), 35 states have return successors, (104), 89 states have call predecessors, (104), 82 states have call successors, (104) [2021-11-19 04:51:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1012 transitions. [2021-11-19 04:51:40,857 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1012 transitions. Word has length 29 [2021-11-19 04:51:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:40,858 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1012 transitions. [2021-11-19 04:51:40,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1012 transitions. [2021-11-19 04:51:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:51:40,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:40,863 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 04:51:40,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:51:40,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash 18714975, now seen corresponding path program 1 times [2021-11-19 04:51:40,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:40,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890842813] [2021-11-19 04:51:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:40,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:40,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 04:51:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:40,927 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 04:51:40,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:40,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890842813] [2021-11-19 04:51:40,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890842813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:40,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:40,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:40,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614030470] [2021-11-19 04:51:40,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:40,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:40,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:40,932 INFO L87 Difference]: Start difference. First operand 703 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 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 04:51:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:41,327 INFO L93 Difference]: Finished difference Result 999 states and 1443 transitions. [2021-11-19 04:51:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:51:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 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 35 [2021-11-19 04:51:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:41,335 INFO L225 Difference]: With dead ends: 999 [2021-11-19 04:51:41,335 INFO L226 Difference]: Without dead ends: 772 [2021-11-19 04:51:41,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 04:51:41,339 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 254 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:41,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1774 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:51:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-19 04:51:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 686. [2021-11-19 04:51:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4113475177304964) internal successors, (796), 571 states have internal predecessors, (796), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2021-11-19 04:51:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 983 transitions. [2021-11-19 04:51:41,415 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 983 transitions. Word has length 35 [2021-11-19 04:51:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:41,415 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 983 transitions. [2021-11-19 04:51:41,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 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 04:51:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 983 transitions. [2021-11-19 04:51:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:51:41,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:41,421 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] [2021-11-19 04:51:41,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:51:41,422 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1008894227, now seen corresponding path program 1 times [2021-11-19 04:51:41,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:41,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608262518] [2021-11-19 04:51:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:41,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:41,484 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 04:51:41,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:41,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608262518] [2021-11-19 04:51:41,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608262518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:41,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:41,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:41,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661327363] [2021-11-19 04:51:41,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:41,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:41,487 INFO L87 Difference]: Start difference. First operand 686 states and 983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 04:51:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:41,887 INFO L93 Difference]: Finished difference Result 744 states and 1056 transitions. [2021-11-19 04:51:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:51:41,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 32 [2021-11-19 04:51:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:41,894 INFO L225 Difference]: With dead ends: 744 [2021-11-19 04:51:41,894 INFO L226 Difference]: Without dead ends: 702 [2021-11-19 04:51:41,895 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 04:51:41,897 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 691 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:41,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 1101 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:51:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-19 04:51:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 686. [2021-11-19 04:51:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4078014184397163) internal successors, (794), 571 states have internal predecessors, (794), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2021-11-19 04:51:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 981 transitions. [2021-11-19 04:51:41,975 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 981 transitions. Word has length 32 [2021-11-19 04:51:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:41,978 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 981 transitions. [2021-11-19 04:51:41,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 04:51:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 981 transitions. [2021-11-19 04:51:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:51:41,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:41,983 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] [2021-11-19 04:51:41,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:51:41,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1838861437, now seen corresponding path program 1 times [2021-11-19 04:51:41,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:41,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91780113] [2021-11-19 04:51:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:41,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:42,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 04:51:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:42,056 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 04:51:42,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:42,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91780113] [2021-11-19 04:51:42,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91780113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:42,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:42,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:42,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785388435] [2021-11-19 04:51:42,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:42,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:42,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:42,061 INFO L87 Difference]: Start difference. First operand 686 states and 981 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:51:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:42,388 INFO L93 Difference]: Finished difference Result 771 states and 1109 transitions. [2021-11-19 04:51:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:51:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 04:51:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:42,396 INFO L225 Difference]: With dead ends: 771 [2021-11-19 04:51:42,396 INFO L226 Difference]: Without dead ends: 711 [2021-11-19 04:51:42,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 04:51:42,398 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 703 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:42,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 1256 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:51:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-11-19 04:51:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 675. [2021-11-19 04:51:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 557 states have (on average 1.4093357271095153) internal successors, (785), 564 states have internal predecessors, (785), 85 states have call successors, (85), 26 states have call predecessors, (85), 32 states have return successors, (98), 84 states have call predecessors, (98), 79 states have call successors, (98) [2021-11-19 04:51:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 968 transitions. [2021-11-19 04:51:42,469 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 968 transitions. Word has length 36 [2021-11-19 04:51:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:42,470 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 968 transitions. [2021-11-19 04:51:42,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:51:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 968 transitions. [2021-11-19 04:51:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:51:42,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:42,474 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 04:51:42,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:51:42,474 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash 138801832, now seen corresponding path program 1 times [2021-11-19 04:51:42,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:42,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057764172] [2021-11-19 04:51:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:42,535 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 04:51:42,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:42,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057764172] [2021-11-19 04:51:42,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057764172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:42,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:42,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:51:42,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776518839] [2021-11-19 04:51:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:42,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:51:42,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:51:42,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:51:42,538 INFO L87 Difference]: Start difference. First operand 675 states and 968 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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 04:51:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:42,692 INFO L93 Difference]: Finished difference Result 832 states and 1184 transitions. [2021-11-19 04:51:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:51:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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 04:51:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:42,700 INFO L225 Difference]: With dead ends: 832 [2021-11-19 04:51:42,700 INFO L226 Difference]: Without dead ends: 821 [2021-11-19 04:51:42,701 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 04:51:42,701 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 132 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1384 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:51:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-11-19 04:51:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 723. [2021-11-19 04:51:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 601 states have (on average 1.3860232945091515) internal successors, (833), 601 states have internal predecessors, (833), 85 states have call successors, (85), 26 states have call predecessors, (85), 36 states have return successors, (109), 95 states have call predecessors, (109), 79 states have call successors, (109) [2021-11-19 04:51:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1027 transitions. [2021-11-19 04:51:42,768 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1027 transitions. Word has length 34 [2021-11-19 04:51:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:42,769 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1027 transitions. [2021-11-19 04:51:42,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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 04:51:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1027 transitions. [2021-11-19 04:51:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:51:42,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:42,773 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 04:51:42,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:51:42,774 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash -298326298, now seen corresponding path program 1 times [2021-11-19 04:51:42,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:42,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672553398] [2021-11-19 04:51:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:42,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:42,962 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 04:51:42,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:42,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672553398] [2021-11-19 04:51:42,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672553398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:42,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:42,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:42,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347310709] [2021-11-19 04:51:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:42,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:42,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:42,964 INFO L87 Difference]: Start difference. First operand 723 states and 1027 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 04:51:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:43,363 INFO L93 Difference]: Finished difference Result 751 states and 1058 transitions. [2021-11-19 04:51:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:51:43,364 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 04:51:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:43,370 INFO L225 Difference]: With dead ends: 751 [2021-11-19 04:51:43,370 INFO L226 Difference]: Without dead ends: 704 [2021-11-19 04:51:43,371 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 04:51:43,372 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 671 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:43,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1100 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:51:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-19 04:51:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 694. [2021-11-19 04:51:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 575 states have (on average 1.391304347826087) internal successors, (800), 581 states have internal predecessors, (800), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-11-19 04:51:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 983 transitions. [2021-11-19 04:51:43,459 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 983 transitions. Word has length 34 [2021-11-19 04:51:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:43,459 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 983 transitions. [2021-11-19 04:51:43,459 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 04:51:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 983 transitions. [2021-11-19 04:51:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:51:43,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:43,463 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 04:51:43,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:51:43,464 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash 452395434, now seen corresponding path program 1 times [2021-11-19 04:51:43,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:43,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138893286] [2021-11-19 04:51:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:43,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:43,529 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 04:51:43,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:43,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138893286] [2021-11-19 04:51:43,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138893286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:43,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:43,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:43,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174588217] [2021-11-19 04:51:43,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:43,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:43,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:43,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:43,533 INFO L87 Difference]: Start difference. First operand 694 states and 983 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 04:51:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:44,009 INFO L93 Difference]: Finished difference Result 792 states and 1125 transitions. [2021-11-19 04:51:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:51:44,010 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 04:51:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:44,017 INFO L225 Difference]: With dead ends: 792 [2021-11-19 04:51:44,017 INFO L226 Difference]: Without dead ends: 788 [2021-11-19 04:51:44,018 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 04:51:44,019 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 740 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:44,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1194 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:51:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-11-19 04:51:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 696. [2021-11-19 04:51:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 577 states have (on average 1.389948006932409) internal successors, (802), 583 states have internal predecessors, (802), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-11-19 04:51:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 985 transitions. [2021-11-19 04:51:44,097 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 985 transitions. Word has length 35 [2021-11-19 04:51:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:44,097 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 985 transitions. [2021-11-19 04:51:44,098 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 04:51:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 985 transitions. [2021-11-19 04:51:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:51:44,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:44,101 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 04:51:44,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:51:44,101 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash 452672264, now seen corresponding path program 1 times [2021-11-19 04:51:44,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:44,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431469166] [2021-11-19 04:51:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:44,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:44,156 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 04:51:44,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:44,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431469166] [2021-11-19 04:51:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431469166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:44,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:51:44,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134414852] [2021-11-19 04:51:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:44,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:51:44,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:51:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:51:44,159 INFO L87 Difference]: Start difference. First operand 696 states and 985 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 04:51:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:44,300 INFO L93 Difference]: Finished difference Result 709 states and 998 transitions. [2021-11-19 04:51:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:51:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 04:51:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:44,305 INFO L225 Difference]: With dead ends: 709 [2021-11-19 04:51:44,306 INFO L226 Difference]: Without dead ends: 679 [2021-11-19 04:51:44,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:51:44,307 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 38 mSDsluCounter, 2545 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:44,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 3193 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:51:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-19 04:51:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2021-11-19 04:51:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 560 states have (on average 1.3964285714285714) internal successors, (782), 566 states have internal predecessors, (782), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-11-19 04:51:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 965 transitions. [2021-11-19 04:51:44,374 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 965 transitions. Word has length 35 [2021-11-19 04:51:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:44,374 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 965 transitions. [2021-11-19 04:51:44,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 04:51:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 965 transitions. [2021-11-19 04:51:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:51:44,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:44,377 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 04:51:44,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:51:44,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1733603893, now seen corresponding path program 1 times [2021-11-19 04:51:44,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:44,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385325120] [2021-11-19 04:51:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:44,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:44,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:51:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:44,425 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 04:51:44,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:44,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385325120] [2021-11-19 04:51:44,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385325120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:44,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:44,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:51:44,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853628794] [2021-11-19 04:51:44,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:44,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:51:44,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:51:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:51:44,428 INFO L87 Difference]: Start difference. First operand 679 states and 965 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 04:51:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:44,810 INFO L93 Difference]: Finished difference Result 717 states and 1030 transitions. [2021-11-19 04:51:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:51:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 04:51:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:44,817 INFO L225 Difference]: With dead ends: 717 [2021-11-19 04:51:44,818 INFO L226 Difference]: Without dead ends: 710 [2021-11-19 04:51:44,819 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 04:51:44,820 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 150 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:44,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1540 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:51:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-11-19 04:51:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2021-11-19 04:51:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3909249563699826) internal successors, (797), 579 states have internal predecessors, (797), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-11-19 04:51:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 980 transitions. [2021-11-19 04:51:44,891 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 980 transitions. Word has length 37 [2021-11-19 04:51:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:44,892 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 980 transitions. [2021-11-19 04:51:44,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 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 04:51:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 980 transitions. [2021-11-19 04:51:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:51:44,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:44,895 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 04:51:44,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:51:44,896 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -190291046, now seen corresponding path program 1 times [2021-11-19 04:51:44,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:44,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748751103] [2021-11-19 04:51:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:44,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:44,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:51:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:45,035 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 04:51:45,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:45,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748751103] [2021-11-19 04:51:45,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748751103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:45,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:45,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:51:45,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936620555] [2021-11-19 04:51:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:45,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:51:45,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:51:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:51:45,038 INFO L87 Difference]: Start difference. First operand 692 states and 980 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 04:51:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:45,649 INFO L93 Difference]: Finished difference Result 716 states and 1026 transitions. [2021-11-19 04:51:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:51:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 39 [2021-11-19 04:51:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:45,656 INFO L225 Difference]: With dead ends: 716 [2021-11-19 04:51:45,657 INFO L226 Difference]: Without dead ends: 710 [2021-11-19 04:51:45,658 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 04:51:45,658 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 780 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:45,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 1451 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:51:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-11-19 04:51:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2021-11-19 04:51:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3891797556719023) internal successors, (796), 579 states have internal predecessors, (796), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-11-19 04:51:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 979 transitions. [2021-11-19 04:51:45,736 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 979 transitions. Word has length 39 [2021-11-19 04:51:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:45,736 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 979 transitions. [2021-11-19 04:51:45,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 04:51:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 979 transitions. [2021-11-19 04:51:45,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:51:45,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:45,740 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] [2021-11-19 04:51:45,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:51:45,741 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1290991354, now seen corresponding path program 1 times [2021-11-19 04:51:45,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:45,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375985966] [2021-11-19 04:51:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:45,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:45,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:51:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:45,849 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 04:51:45,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:45,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375985966] [2021-11-19 04:51:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375985966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:45,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:45,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:51:45,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993868080] [2021-11-19 04:51:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:45,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:51:45,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:51:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:51:45,855 INFO L87 Difference]: Start difference. First operand 692 states and 979 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 04:51:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:46,358 INFO L93 Difference]: Finished difference Result 731 states and 1044 transitions. [2021-11-19 04:51:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:51:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 40 [2021-11-19 04:51:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:46,367 INFO L225 Difference]: With dead ends: 731 [2021-11-19 04:51:46,367 INFO L226 Difference]: Without dead ends: 699 [2021-11-19 04:51:46,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:51:46,369 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 158 mSDsluCounter, 3350 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 3968 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:46,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 3968 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:51:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-19 04:51:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 683. [2021-11-19 04:51:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3710247349823321) internal successors, (776), 572 states have internal predecessors, (776), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2021-11-19 04:51:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 955 transitions. [2021-11-19 04:51:46,432 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 955 transitions. Word has length 40 [2021-11-19 04:51:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:46,432 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 955 transitions. [2021-11-19 04:51:46,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 04:51:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 955 transitions. [2021-11-19 04:51:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:51:46,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:46,436 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] [2021-11-19 04:51:46,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:51:46,436 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1689117095, now seen corresponding path program 1 times [2021-11-19 04:51:46,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:46,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663864766] [2021-11-19 04:51:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:46,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:46,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:51:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:46,489 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 04:51:46,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:46,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663864766] [2021-11-19 04:51:46,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663864766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:46,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:46,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:51:46,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833717929] [2021-11-19 04:51:46,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:46,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:51:46,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:51:46,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:51:46,493 INFO L87 Difference]: Start difference. First operand 683 states and 955 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 04:51:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:47,202 INFO L93 Difference]: Finished difference Result 764 states and 1068 transitions. [2021-11-19 04:51:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:51:47,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 41 [2021-11-19 04:51:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:47,208 INFO L225 Difference]: With dead ends: 764 [2021-11-19 04:51:47,208 INFO L226 Difference]: Without dead ends: 728 [2021-11-19 04:51:47,209 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 04:51:47,210 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 789 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:47,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 1511 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:51:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-19 04:51:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 683. [2021-11-19 04:51:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3692579505300353) internal successors, (775), 572 states have internal predecessors, (775), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2021-11-19 04:51:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 954 transitions. [2021-11-19 04:51:47,281 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 954 transitions. Word has length 41 [2021-11-19 04:51:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:47,281 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 954 transitions. [2021-11-19 04:51:47,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 04:51:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 954 transitions. [2021-11-19 04:51:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:51:47,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:47,285 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 04:51:47,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:51:47,285 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:47,286 INFO L85 PathProgramCache]: Analyzing trace with hash -90091863, now seen corresponding path program 1 times [2021-11-19 04:51:47,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:47,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130472525] [2021-11-19 04:51:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:47,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:47,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:51:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:47,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 04:51:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:47,339 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 04:51:47,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:47,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130472525] [2021-11-19 04:51:47,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130472525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:47,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:47,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:51:47,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008251786] [2021-11-19 04:51:47,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:47,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:51:47,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:51:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:51:47,342 INFO L87 Difference]: Start difference. First operand 683 states and 954 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:47,995 INFO L93 Difference]: Finished difference Result 890 states and 1253 transitions. [2021-11-19 04:51:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:51:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 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 04:51:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:48,002 INFO L225 Difference]: With dead ends: 890 [2021-11-19 04:51:48,003 INFO L226 Difference]: Without dead ends: 678 [2021-11-19 04:51:48,004 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 04:51:48,005 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 252 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:48,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1838 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:51:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-19 04:51:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 662. [2021-11-19 04:51:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 548 states have (on average 1.364963503649635) internal successors, (748), 553 states have internal predecessors, (748), 82 states have call successors, (82), 26 states have call predecessors, (82), 31 states have return successors, (94), 82 states have call predecessors, (94), 77 states have call successors, (94) [2021-11-19 04:51:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 924 transitions. [2021-11-19 04:51:48,104 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 924 transitions. Word has length 43 [2021-11-19 04:51:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:48,104 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 924 transitions. [2021-11-19 04:51:48,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 924 transitions. [2021-11-19 04:51:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:51:48,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:48,108 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 04:51:48,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:51:48,109 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1421107692, now seen corresponding path program 1 times [2021-11-19 04:51:48,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:48,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770492791] [2021-11-19 04:51:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:48,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:51:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:48,247 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 04:51:48,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:48,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770492791] [2021-11-19 04:51:48,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770492791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:48,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:48,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:51:48,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671472132] [2021-11-19 04:51:48,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:48,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:51:48,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:51:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:51:48,252 INFO L87 Difference]: Start difference. First operand 662 states and 924 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:49,335 INFO L93 Difference]: Finished difference Result 692 states and 978 transitions. [2021-11-19 04:51:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:51:49,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 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 04:51:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:49,342 INFO L225 Difference]: With dead ends: 692 [2021-11-19 04:51:49,342 INFO L226 Difference]: Without dead ends: 676 [2021-11-19 04:51:49,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:51:49,345 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 98 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4437 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:49,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4437 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:51:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-19 04:51:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2021-11-19 04:51:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 547 states have (on average 1.363802559414991) internal successors, (746), 552 states have internal predecessors, (746), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2021-11-19 04:51:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 920 transitions. [2021-11-19 04:51:49,417 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 920 transitions. Word has length 43 [2021-11-19 04:51:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:49,418 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 920 transitions. [2021-11-19 04:51:49,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 920 transitions. [2021-11-19 04:51:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:51:49,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:49,421 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 04:51:49,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:51:49,422 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash 531963361, now seen corresponding path program 1 times [2021-11-19 04:51:49,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:49,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251147751] [2021-11-19 04:51:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:49,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:51:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:49,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:49,629 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 04:51:49,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:49,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251147751] [2021-11-19 04:51:49,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251147751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:49,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:49,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 04:51:49,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82793226] [2021-11-19 04:51:49,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:49,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:51:49,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:51:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:51:49,632 INFO L87 Difference]: Start difference. First operand 660 states and 920 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:50,857 INFO L93 Difference]: Finished difference Result 712 states and 998 transitions. [2021-11-19 04:51:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:51:50,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-11-19 04:51:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:50,864 INFO L225 Difference]: With dead ends: 712 [2021-11-19 04:51:50,864 INFO L226 Difference]: Without dead ends: 691 [2021-11-19 04:51:50,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:51:50,866 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 171 mSDsluCounter, 4776 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5357 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:50,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 5357 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:51:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-11-19 04:51:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 659. [2021-11-19 04:51:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 546 states have (on average 1.3461538461538463) internal successors, (735), 551 states have internal predecessors, (735), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2021-11-19 04:51:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 909 transitions. [2021-11-19 04:51:50,934 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 909 transitions. Word has length 44 [2021-11-19 04:51:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:50,934 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 909 transitions. [2021-11-19 04:51:50,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 909 transitions. [2021-11-19 04:51:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:51:50,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:50,937 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 04:51:50,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:51:50,938 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash -927803137, now seen corresponding path program 1 times [2021-11-19 04:51:50,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:50,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859232339] [2021-11-19 04:51:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:50,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:50,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:51:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:51,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:51,047 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 04:51:51,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:51,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859232339] [2021-11-19 04:51:51,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859232339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:51,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:51,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:51:51,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601031087] [2021-11-19 04:51:51,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:51,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:51:51,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:51,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:51:51,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:51:51,050 INFO L87 Difference]: Start difference. First operand 659 states and 909 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:51,969 INFO L93 Difference]: Finished difference Result 688 states and 962 transitions. [2021-11-19 04:51:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:51:51,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-11-19 04:51:51,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:51,979 INFO L225 Difference]: With dead ends: 688 [2021-11-19 04:51:51,980 INFO L226 Difference]: Without dead ends: 672 [2021-11-19 04:51:51,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:51:51,981 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 98 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:51,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4293 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:51:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-19 04:51:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 656. [2021-11-19 04:51:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 544 states have (on average 1.3455882352941178) internal successors, (732), 549 states have internal predecessors, (732), 80 states have call successors, (80), 26 states have call predecessors, (80), 31 states have return successors, (92), 80 states have call predecessors, (92), 75 states have call successors, (92) [2021-11-19 04:51:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 904 transitions. [2021-11-19 04:51:52,057 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 904 transitions. Word has length 44 [2021-11-19 04:51:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:52,057 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 904 transitions. [2021-11-19 04:51:52,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 904 transitions. [2021-11-19 04:51:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:51:52,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:52,064 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 04:51:52,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 04:51:52,065 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash 116231593, now seen corresponding path program 1 times [2021-11-19 04:51:52,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:52,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831901824] [2021-11-19 04:51:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:52,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:52,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:51:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:52,157 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 04:51:52,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831901824] [2021-11-19 04:51:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831901824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:52,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:52,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:51:52,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829711980] [2021-11-19 04:51:52,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:52,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:51:52,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:52,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:51:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:51:52,160 INFO L87 Difference]: Start difference. First operand 656 states and 904 transitions. Second operand has 8 states, 8 states have (on average 5.125) 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 04:51:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:52,634 INFO L93 Difference]: Finished difference Result 690 states and 962 transitions. [2021-11-19 04:51:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:51:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) 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 04:51:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:52,639 INFO L225 Difference]: With dead ends: 690 [2021-11-19 04:51:52,639 INFO L226 Difference]: Without dead ends: 660 [2021-11-19 04:51:52,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:51:52,641 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 158 mSDsluCounter, 3098 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 3671 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:52,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 3671 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:51:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-19 04:51:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 644. [2021-11-19 04:51:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 535 states have (on average 1.3401869158878505) internal successors, (717), 540 states have internal predecessors, (717), 77 states have call successors, (77), 26 states have call predecessors, (77), 31 states have return successors, (89), 77 states have call predecessors, (89), 72 states have call successors, (89) [2021-11-19 04:51:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 883 transitions. [2021-11-19 04:51:52,699 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 883 transitions. Word has length 44 [2021-11-19 04:51:52,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:52,700 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 883 transitions. [2021-11-19 04:51:52,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) 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 04:51:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 883 transitions. [2021-11-19 04:51:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:51:52,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:52,703 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] [2021-11-19 04:51:52,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 04:51:52,704 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash 39637354, now seen corresponding path program 1 times [2021-11-19 04:51:52,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:52,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552479764] [2021-11-19 04:51:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:52,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:52,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:51:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:52,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:51:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:52,755 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 04:51:52,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:52,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552479764] [2021-11-19 04:51:52,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552479764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:52,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:52,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:51:52,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313777085] [2021-11-19 04:51:52,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:52,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:51:52,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:51:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:51:52,758 INFO L87 Difference]: Start difference. First operand 644 states and 883 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:53,290 INFO L93 Difference]: Finished difference Result 789 states and 1125 transitions. [2021-11-19 04:51:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:51:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-19 04:51:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:53,298 INFO L225 Difference]: With dead ends: 789 [2021-11-19 04:51:53,298 INFO L226 Difference]: Without dead ends: 695 [2021-11-19 04:51:53,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:51:53,300 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 134 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:53,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2225 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:51:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-11-19 04:51:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 651. [2021-11-19 04:51:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 540 states have (on average 1.3407407407407408) internal successors, (724), 546 states have internal predecessors, (724), 78 states have call successors, (78), 26 states have call predecessors, (78), 32 states have return successors, (96), 78 states have call predecessors, (96), 73 states have call successors, (96) [2021-11-19 04:51:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 898 transitions. [2021-11-19 04:51:53,366 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 898 transitions. Word has length 45 [2021-11-19 04:51:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:53,366 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 898 transitions. [2021-11-19 04:51:53,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 898 transitions. [2021-11-19 04:51:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:51:53,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:53,370 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] [2021-11-19 04:51:53,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:51:53,371 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash -469835736, now seen corresponding path program 1 times [2021-11-19 04:51:53,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:53,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384102999] [2021-11-19 04:51:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:53,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:53,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:51:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:51:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:53,454 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 04:51:53,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:53,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384102999] [2021-11-19 04:51:53,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384102999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:53,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:53,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:51:53,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694329156] [2021-11-19 04:51:53,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:53,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:51:53,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:51:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:51:53,458 INFO L87 Difference]: Start difference. First operand 651 states and 898 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:54,043 INFO L93 Difference]: Finished difference Result 689 states and 966 transitions. [2021-11-19 04:51:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:51:54,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-19 04:51:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:54,049 INFO L225 Difference]: With dead ends: 689 [2021-11-19 04:51:54,050 INFO L226 Difference]: Without dead ends: 669 [2021-11-19 04:51:54,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:51:54,051 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 161 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 3874 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:54,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 3874 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:51:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-19 04:51:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 649. [2021-11-19 04:51:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 539 states have (on average 1.339517625231911) internal successors, (722), 545 states have internal predecessors, (722), 77 states have call successors, (77), 26 states have call predecessors, (77), 32 states have return successors, (95), 77 states have call predecessors, (95), 72 states have call successors, (95) [2021-11-19 04:51:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 894 transitions. [2021-11-19 04:51:54,114 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 894 transitions. Word has length 45 [2021-11-19 04:51:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:54,114 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 894 transitions. [2021-11-19 04:51:54,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 894 transitions. [2021-11-19 04:51:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:51:54,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:54,118 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] [2021-11-19 04:51:54,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 04:51:54,119 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1759820693, now seen corresponding path program 1 times [2021-11-19 04:51:54,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:54,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147714050] [2021-11-19 04:51:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:54,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:51:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,189 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 04:51:54,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:54,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147714050] [2021-11-19 04:51:54,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147714050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:54,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:54,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:51:54,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002541532] [2021-11-19 04:51:54,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:54,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:51:54,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:51:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:51:54,193 INFO L87 Difference]: Start difference. First operand 649 states and 894 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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 04:51:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:54,652 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2021-11-19 04:51:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:51:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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 45 [2021-11-19 04:51:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:54,670 INFO L225 Difference]: With dead ends: 696 [2021-11-19 04:51:54,671 INFO L226 Difference]: Without dead ends: 661 [2021-11-19 04:51:54,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:51:54,673 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 166 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 3574 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:54,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 3574 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:51:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-11-19 04:51:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 641. [2021-11-19 04:51:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 533 states have (on average 1.3320825515947468) internal successors, (710), 539 states have internal predecessors, (710), 75 states have call successors, (75), 26 states have call predecessors, (75), 32 states have return successors, (93), 75 states have call predecessors, (93), 70 states have call successors, (93) [2021-11-19 04:51:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 878 transitions. [2021-11-19 04:51:54,734 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 878 transitions. Word has length 45 [2021-11-19 04:51:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:54,734 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 878 transitions. [2021-11-19 04:51:54,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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 04:51:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 878 transitions. [2021-11-19 04:51:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:51:54,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:54,738 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] [2021-11-19 04:51:54,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 04:51:54,739 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:54,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1002239718, now seen corresponding path program 1 times [2021-11-19 04:51:54,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:54,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349757425] [2021-11-19 04:51:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:54,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:51:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,946 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 04:51:54,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:54,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349757425] [2021-11-19 04:51:54,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349757425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:54,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:54,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:51:54,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164910714] [2021-11-19 04:51:54,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:54,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:51:54,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:51:54,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:51:54,949 INFO L87 Difference]: Start difference. First operand 641 states and 878 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:55,982 INFO L93 Difference]: Finished difference Result 676 states and 943 transitions. [2021-11-19 04:51:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:51:55,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2021-11-19 04:51:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:55,988 INFO L225 Difference]: With dead ends: 676 [2021-11-19 04:51:55,988 INFO L226 Difference]: Without dead ends: 658 [2021-11-19 04:51:55,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:51:55,990 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 110 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 4329 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:55,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 4329 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:51:55,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-19 04:51:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2021-11-19 04:51:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 531 states have (on average 1.3314500941619585) internal successors, (707), 537 states have internal predecessors, (707), 74 states have call successors, (74), 26 states have call predecessors, (74), 32 states have return successors, (92), 74 states have call predecessors, (92), 69 states have call successors, (92) [2021-11-19 04:51:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 873 transitions. [2021-11-19 04:51:56,059 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 873 transitions. Word has length 46 [2021-11-19 04:51:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:56,059 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 873 transitions. [2021-11-19 04:51:56,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:51:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 873 transitions. [2021-11-19 04:51:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:51:56,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:56,063 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] [2021-11-19 04:51:56,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 04:51:56,063 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash -113531146, now seen corresponding path program 1 times [2021-11-19 04:51:56,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:56,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557425343] [2021-11-19 04:51:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:56,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:56,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:51:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:51:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:56,148 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 04:51:56,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:56,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557425343] [2021-11-19 04:51:56,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557425343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:56,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:56,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:51:56,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455679537] [2021-11-19 04:51:56,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:56,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:51:56,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:56,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:51:56,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:51:56,152 INFO L87 Difference]: Start difference. First operand 638 states and 873 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:56,563 INFO L93 Difference]: Finished difference Result 695 states and 980 transitions. [2021-11-19 04:51:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:51:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-11-19 04:51:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:56,569 INFO L225 Difference]: With dead ends: 695 [2021-11-19 04:51:56,569 INFO L226 Difference]: Without dead ends: 668 [2021-11-19 04:51:56,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:51:56,571 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 187 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:56,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 2358 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:51:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-19 04:51:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 642. [2021-11-19 04:51:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 533 states have (on average 1.3302063789868668) internal successors, (709), 541 states have internal predecessors, (709), 74 states have call successors, (74), 26 states have call predecessors, (74), 34 states have return successors, (108), 74 states have call predecessors, (108), 69 states have call successors, (108) [2021-11-19 04:51:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 891 transitions. [2021-11-19 04:51:56,631 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 891 transitions. Word has length 46 [2021-11-19 04:51:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:56,632 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 891 transitions. [2021-11-19 04:51:56,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 891 transitions. [2021-11-19 04:51:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:56,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:56,636 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 04:51:56,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 04:51:56,637 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1506455403, now seen corresponding path program 1 times [2021-11-19 04:51:56,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:56,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3973645] [2021-11-19 04:51:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:56,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:51:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:56,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:56,835 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 04:51:56,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:56,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3973645] [2021-11-19 04:51:56,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3973645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:56,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:56,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 04:51:56,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021953144] [2021-11-19 04:51:56,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:56,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:51:56,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:51:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:51:56,844 INFO L87 Difference]: Start difference. First operand 642 states and 891 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:57,777 INFO L93 Difference]: Finished difference Result 680 states and 959 transitions. [2021-11-19 04:51:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:51:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-11-19 04:51:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:57,784 INFO L225 Difference]: With dead ends: 680 [2021-11-19 04:51:57,784 INFO L226 Difference]: Without dead ends: 660 [2021-11-19 04:51:57,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:51:57,786 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 239 mSDsluCounter, 4335 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 4868 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:57,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 4868 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:51:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-19 04:51:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 640. [2021-11-19 04:51:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 532 states have (on average 1.3289473684210527) internal successors, (707), 540 states have internal predecessors, (707), 73 states have call successors, (73), 26 states have call predecessors, (73), 34 states have return successors, (107), 73 states have call predecessors, (107), 68 states have call successors, (107) [2021-11-19 04:51:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 887 transitions. [2021-11-19 04:51:57,847 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 887 transitions. Word has length 48 [2021-11-19 04:51:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:57,848 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 887 transitions. [2021-11-19 04:51:57,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 887 transitions. [2021-11-19 04:51:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:51:57,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:57,852 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] [2021-11-19 04:51:57,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 04:51:57,853 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1400503670, now seen corresponding path program 1 times [2021-11-19 04:51:57,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:57,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374991647] [2021-11-19 04:51:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:57,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:51:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,987 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 04:51:57,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:57,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374991647] [2021-11-19 04:51:57,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374991647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:57,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:57,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 04:51:57,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892369976] [2021-11-19 04:51:57,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:57,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:51:57,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:51:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:51:57,989 INFO L87 Difference]: Start difference. First operand 640 states and 887 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:58,891 INFO L93 Difference]: Finished difference Result 694 states and 972 transitions. [2021-11-19 04:51:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:51:58,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2021-11-19 04:51:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:58,897 INFO L225 Difference]: With dead ends: 694 [2021-11-19 04:51:58,898 INFO L226 Difference]: Without dead ends: 674 [2021-11-19 04:51:58,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:51:58,902 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 172 mSDsluCounter, 4171 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 4688 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:58,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 4688 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:51:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-19 04:51:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 638. [2021-11-19 04:51:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 531 states have (on average 1.3276836158192091) internal successors, (705), 539 states have internal predecessors, (705), 72 states have call successors, (72), 26 states have call predecessors, (72), 34 states have return successors, (106), 72 states have call predecessors, (106), 67 states have call successors, (106) [2021-11-19 04:51:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 883 transitions. [2021-11-19 04:51:58,983 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 883 transitions. Word has length 47 [2021-11-19 04:51:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:58,984 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 883 transitions. [2021-11-19 04:51:58,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:51:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 883 transitions. [2021-11-19 04:51:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:58,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:58,989 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 04:51:58,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 04:51:58,990 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:58,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1310476923, now seen corresponding path program 1 times [2021-11-19 04:51:58,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:58,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435613747] [2021-11-19 04:51:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:58,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:51:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,181 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 04:51:59,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:59,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435613747] [2021-11-19 04:51:59,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435613747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:59,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:59,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:51:59,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027035890] [2021-11-19 04:51:59,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:59,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:51:59,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:51:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:51:59,184 INFO L87 Difference]: Start difference. First operand 638 states and 883 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:00,378 INFO L93 Difference]: Finished difference Result 673 states and 948 transitions. [2021-11-19 04:52:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 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 04:52:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:00,391 INFO L225 Difference]: With dead ends: 673 [2021-11-19 04:52:00,392 INFO L226 Difference]: Without dead ends: 655 [2021-11-19 04:52:00,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:52:00,395 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 123 mSDsluCounter, 4109 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4644 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:00,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4644 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:52:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-19 04:52:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 635. [2021-11-19 04:52:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 529 states have (on average 1.3270321361058601) internal successors, (702), 537 states have internal predecessors, (702), 71 states have call successors, (71), 26 states have call predecessors, (71), 34 states have return successors, (105), 71 states have call predecessors, (105), 66 states have call successors, (105) [2021-11-19 04:52:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 878 transitions. [2021-11-19 04:52:00,458 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 878 transitions. Word has length 48 [2021-11-19 04:52:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:00,459 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 878 transitions. [2021-11-19 04:52:00,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 878 transitions. [2021-11-19 04:52:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:52:00,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:00,463 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] [2021-11-19 04:52:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 04:52:00,463 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash -631995317, now seen corresponding path program 1 times [2021-11-19 04:52:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:00,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290567443] [2021-11-19 04:52:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:00,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,657 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 04:52:00,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290567443] [2021-11-19 04:52:00,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290567443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:00,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:00,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:52:00,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054723704] [2021-11-19 04:52:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:52:00,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:52:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:00,661 INFO L87 Difference]: Start difference. First operand 635 states and 878 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:01,869 INFO L93 Difference]: Finished difference Result 670 states and 943 transitions. [2021-11-19 04:52:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2021-11-19 04:52:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:01,878 INFO L225 Difference]: With dead ends: 670 [2021-11-19 04:52:01,878 INFO L226 Difference]: Without dead ends: 652 [2021-11-19 04:52:01,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:52:01,885 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 123 mSDsluCounter, 4065 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4593 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:01,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4593 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:52:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-19 04:52:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 632. [2021-11-19 04:52:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 527 states have (on average 1.3263757115749526) internal successors, (699), 535 states have internal predecessors, (699), 70 states have call successors, (70), 26 states have call predecessors, (70), 34 states have return successors, (104), 70 states have call predecessors, (104), 65 states have call successors, (104) [2021-11-19 04:52:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 873 transitions. [2021-11-19 04:52:01,947 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 873 transitions. Word has length 47 [2021-11-19 04:52:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:01,947 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 873 transitions. [2021-11-19 04:52:01,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 873 transitions. [2021-11-19 04:52:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:52:01,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:01,951 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 04:52:01,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 04:52:01,952 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1897196007, now seen corresponding path program 1 times [2021-11-19 04:52:01,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:01,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412287911] [2021-11-19 04:52:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:01,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 04:52:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:02,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:02,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:02,033 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 04:52:02,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:02,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412287911] [2021-11-19 04:52:02,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412287911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:02,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:02,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:52:02,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860389346] [2021-11-19 04:52:02,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:02,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:02,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:02,036 INFO L87 Difference]: Start difference. First operand 632 states and 873 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:52:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:02,584 INFO L93 Difference]: Finished difference Result 893 states and 1240 transitions. [2021-11-19 04:52:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-19 04:52:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:02,590 INFO L225 Difference]: With dead ends: 893 [2021-11-19 04:52:02,590 INFO L226 Difference]: Without dead ends: 743 [2021-11-19 04:52:02,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 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 04:52:02,592 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 315 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:02,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1333 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:52:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-19 04:52:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 696. [2021-11-19 04:52:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 581 states have (on average 1.3253012048192772) internal successors, (770), 589 states have internal predecessors, (770), 73 states have call successors, (73), 30 states have call predecessors, (73), 41 states have return successors, (113), 76 states have call predecessors, (113), 69 states have call successors, (113) [2021-11-19 04:52:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 956 transitions. [2021-11-19 04:52:02,693 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 956 transitions. Word has length 50 [2021-11-19 04:52:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:02,694 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 956 transitions. [2021-11-19 04:52:02,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:52:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 956 transitions. [2021-11-19 04:52:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:52:02,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:02,698 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 04:52:02,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 04:52:02,698 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:02,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:02,699 INFO L85 PathProgramCache]: Analyzing trace with hash -273874573, now seen corresponding path program 1 times [2021-11-19 04:52:02,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:02,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505492870] [2021-11-19 04:52:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:02,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:02,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:02,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 04:52:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:02,750 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 04:52:02,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:02,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505492870] [2021-11-19 04:52:02,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505492870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:02,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:02,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:52:02,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708899142] [2021-11-19 04:52:02,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:02,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:02,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:02,753 INFO L87 Difference]: Start difference. First operand 696 states and 956 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:03,060 INFO L93 Difference]: Finished difference Result 952 states and 1311 transitions. [2021-11-19 04:52:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-11-19 04:52:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:03,066 INFO L225 Difference]: With dead ends: 952 [2021-11-19 04:52:03,066 INFO L226 Difference]: Without dead ends: 652 [2021-11-19 04:52:03,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 04:52:03,069 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 174 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:03,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1287 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:52:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-19 04:52:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 623. [2021-11-19 04:52:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 524 states have (on average 1.3206106870229009) internal successors, (692), 530 states have internal predecessors, (692), 64 states have call successors, (64), 27 states have call predecessors, (64), 34 states have return successors, (77), 65 states have call predecessors, (77), 60 states have call successors, (77) [2021-11-19 04:52:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 833 transitions. [2021-11-19 04:52:03,128 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 833 transitions. Word has length 48 [2021-11-19 04:52:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:03,128 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 833 transitions. [2021-11-19 04:52:03,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 833 transitions. [2021-11-19 04:52:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:52:03,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:03,132 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] [2021-11-19 04:52:03,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-19 04:52:03,132 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 232958448, now seen corresponding path program 1 times [2021-11-19 04:52:03,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:03,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896083854] [2021-11-19 04:52:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:03,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:03,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:52:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:03,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:03,324 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 04:52:03,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:03,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896083854] [2021-11-19 04:52:03,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896083854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:03,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:03,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:52:03,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044036891] [2021-11-19 04:52:03,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:03,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:03,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:03,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:03,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:03,328 INFO L87 Difference]: Start difference. First operand 623 states and 833 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:04,298 INFO L93 Difference]: Finished difference Result 669 states and 888 transitions. [2021-11-19 04:52:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-11-19 04:52:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:04,304 INFO L225 Difference]: With dead ends: 669 [2021-11-19 04:52:04,304 INFO L226 Difference]: Without dead ends: 649 [2021-11-19 04:52:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:52:04,306 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 345 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 4105 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:04,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 4105 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-11-19 04:52:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 621. [2021-11-19 04:52:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 523 states have (on average 1.3193116634799236) internal successors, (690), 529 states have internal predecessors, (690), 63 states have call successors, (63), 27 states have call predecessors, (63), 34 states have return successors, (76), 64 states have call predecessors, (76), 59 states have call successors, (76) [2021-11-19 04:52:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 829 transitions. [2021-11-19 04:52:04,365 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 829 transitions. Word has length 51 [2021-11-19 04:52:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:04,365 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 829 transitions. [2021-11-19 04:52:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 829 transitions. [2021-11-19 04:52:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:52:04,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:04,369 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 04:52:04,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-19 04:52:04,370 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1171724014, now seen corresponding path program 1 times [2021-11-19 04:52:04,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:04,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660985998] [2021-11-19 04:52:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:04,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:04,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:04,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:52:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:04,437 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 04:52:04,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:04,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660985998] [2021-11-19 04:52:04,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660985998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:04,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:04,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:04,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916101698] [2021-11-19 04:52:04,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:04,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:04,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:04,440 INFO L87 Difference]: Start difference. First operand 621 states and 829 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:04,940 INFO L93 Difference]: Finished difference Result 724 states and 953 transitions. [2021-11-19 04:52:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-11-19 04:52:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:04,957 INFO L225 Difference]: With dead ends: 724 [2021-11-19 04:52:04,958 INFO L226 Difference]: Without dead ends: 698 [2021-11-19 04:52:04,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:52:04,960 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 259 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:04,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 2486 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-19 04:52:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 627. [2021-11-19 04:52:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 528 states have (on average 1.3181818181818181) internal successors, (696), 534 states have internal predecessors, (696), 64 states have call successors, (64), 27 states have call predecessors, (64), 34 states have return successors, (77), 65 states have call predecessors, (77), 60 states have call successors, (77) [2021-11-19 04:52:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 837 transitions. [2021-11-19 04:52:05,020 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 837 transitions. Word has length 50 [2021-11-19 04:52:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:05,020 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 837 transitions. [2021-11-19 04:52:05,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 837 transitions. [2021-11-19 04:52:05,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:52:05,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:05,023 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] [2021-11-19 04:52:05,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-19 04:52:05,024 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:05,024 INFO L85 PathProgramCache]: Analyzing trace with hash 850113778, now seen corresponding path program 1 times [2021-11-19 04:52:05,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:05,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457807699] [2021-11-19 04:52:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:05,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,138 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 04:52:05,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:05,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457807699] [2021-11-19 04:52:05,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457807699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:05,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:05,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:52:05,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460142561] [2021-11-19 04:52:05,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:05,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:52:05,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:52:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:52:05,143 INFO L87 Difference]: Start difference. First operand 627 states and 837 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 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 04:52:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:05,608 INFO L93 Difference]: Finished difference Result 744 states and 998 transitions. [2021-11-19 04:52:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:52:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 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 53 [2021-11-19 04:52:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:05,612 INFO L225 Difference]: With dead ends: 744 [2021-11-19 04:52:05,613 INFO L226 Difference]: Without dead ends: 639 [2021-11-19 04:52:05,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:52:05,615 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 265 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:05,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 1232 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-19 04:52:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 627. [2021-11-19 04:52:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 528 states have (on average 1.3143939393939394) internal successors, (694), 534 states have internal predecessors, (694), 64 states have call successors, (64), 27 states have call predecessors, (64), 34 states have return successors, (77), 65 states have call predecessors, (77), 60 states have call successors, (77) [2021-11-19 04:52:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 835 transitions. [2021-11-19 04:52:05,662 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 835 transitions. Word has length 53 [2021-11-19 04:52:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:05,662 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 835 transitions. [2021-11-19 04:52:05,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 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 04:52:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 835 transitions. [2021-11-19 04:52:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:52:05,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:05,665 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] [2021-11-19 04:52:05,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-19 04:52:05,665 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash -532277969, now seen corresponding path program 1 times [2021-11-19 04:52:05,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:05,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314637541] [2021-11-19 04:52:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:05,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:52:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:05,832 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 04:52:05,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:05,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314637541] [2021-11-19 04:52:05,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314637541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:05,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:05,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:52:05,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792898785] [2021-11-19 04:52:05,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:05,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:05,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:05,836 INFO L87 Difference]: Start difference. First operand 627 states and 835 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:06,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:06,805 INFO L93 Difference]: Finished difference Result 657 states and 873 transitions. [2021-11-19 04:52:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-11-19 04:52:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:06,809 INFO L225 Difference]: With dead ends: 657 [2021-11-19 04:52:06,809 INFO L226 Difference]: Without dead ends: 637 [2021-11-19 04:52:06,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:52:06,813 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 252 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 4390 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:06,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 4390 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:52:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-19 04:52:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 625. [2021-11-19 04:52:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 527 states have (on average 1.3130929791271346) internal successors, (692), 533 states have internal predecessors, (692), 63 states have call successors, (63), 27 states have call predecessors, (63), 34 states have return successors, (76), 64 states have call predecessors, (76), 59 states have call successors, (76) [2021-11-19 04:52:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 831 transitions. [2021-11-19 04:52:06,886 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 831 transitions. Word has length 52 [2021-11-19 04:52:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:06,886 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 831 transitions. [2021-11-19 04:52:06,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 831 transitions. [2021-11-19 04:52:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:52:06,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:06,889 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] [2021-11-19 04:52:06,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-19 04:52:06,889 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash -381678341, now seen corresponding path program 1 times [2021-11-19 04:52:06,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:06,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588416895] [2021-11-19 04:52:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:06,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:06,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:52:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:52:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:06,974 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 04:52:06,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:06,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588416895] [2021-11-19 04:52:06,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588416895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:06,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:06,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:52:06,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373895699] [2021-11-19 04:52:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:06,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:52:06,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:52:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:52:06,977 INFO L87 Difference]: Start difference. First operand 625 states and 831 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:07,638 INFO L93 Difference]: Finished difference Result 671 states and 891 transitions. [2021-11-19 04:52:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:07,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-11-19 04:52:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:07,642 INFO L225 Difference]: With dead ends: 671 [2021-11-19 04:52:07,642 INFO L226 Difference]: Without dead ends: 617 [2021-11-19 04:52:07,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:07,644 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 185 mSDsluCounter, 2729 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3216 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:07,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 3216 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:52:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-19 04:52:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 598. [2021-11-19 04:52:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 505 states have (on average 1.299009900990099) internal successors, (656), 511 states have internal predecessors, (656), 58 states have call successors, (58), 27 states have call predecessors, (58), 34 states have return successors, (70), 59 states have call predecessors, (70), 54 states have call successors, (70) [2021-11-19 04:52:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 784 transitions. [2021-11-19 04:52:07,706 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 784 transitions. Word has length 51 [2021-11-19 04:52:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:07,707 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 784 transitions. [2021-11-19 04:52:07,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 784 transitions. [2021-11-19 04:52:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:52:07,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:07,714 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] [2021-11-19 04:52:07,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-19 04:52:07,715 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1990060921, now seen corresponding path program 1 times [2021-11-19 04:52:07,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:07,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904828867] [2021-11-19 04:52:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:07,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:07,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:52:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:52:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:07,793 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 04:52:07,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:07,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904828867] [2021-11-19 04:52:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904828867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:07,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:07,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995156560] [2021-11-19 04:52:07,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:07,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:07,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:07,801 INFO L87 Difference]: Start difference. First operand 598 states and 784 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:08,260 INFO L93 Difference]: Finished difference Result 651 states and 845 transitions. [2021-11-19 04:52:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-11-19 04:52:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:08,277 INFO L225 Difference]: With dead ends: 651 [2021-11-19 04:52:08,277 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 04:52:08,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:08,279 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 98 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:08,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 2109 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 04:52:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 588. [2021-11-19 04:52:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 497 states have (on average 1.295774647887324) internal successors, (644), 503 states have internal predecessors, (644), 56 states have call successors, (56), 27 states have call predecessors, (56), 34 states have return successors, (68), 57 states have call predecessors, (68), 52 states have call successors, (68) [2021-11-19 04:52:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 768 transitions. [2021-11-19 04:52:08,353 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 768 transitions. Word has length 51 [2021-11-19 04:52:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:08,353 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 768 transitions. [2021-11-19 04:52:08,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 768 transitions. [2021-11-19 04:52:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:52:08,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:08,356 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] [2021-11-19 04:52:08,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-19 04:52:08,357 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 105801563, now seen corresponding path program 1 times [2021-11-19 04:52:08,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:08,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361659351] [2021-11-19 04:52:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:08,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:08,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:08,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:52:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:08,430 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 04:52:08,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:08,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361659351] [2021-11-19 04:52:08,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361659351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:08,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:08,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:08,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964282275] [2021-11-19 04:52:08,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:08,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:08,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:08,434 INFO L87 Difference]: Start difference. First operand 588 states and 768 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:08,868 INFO L93 Difference]: Finished difference Result 627 states and 815 transitions. [2021-11-19 04:52:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-11-19 04:52:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:08,872 INFO L225 Difference]: With dead ends: 627 [2021-11-19 04:52:08,872 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 04:52:08,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:08,873 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 94 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:08,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 2113 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 04:52:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 583. [2021-11-19 04:52:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 493 states have (on average 1.2961460446247464) internal successors, (639), 499 states have internal predecessors, (639), 55 states have call successors, (55), 27 states have call predecessors, (55), 34 states have return successors, (67), 56 states have call predecessors, (67), 51 states have call successors, (67) [2021-11-19 04:52:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 761 transitions. [2021-11-19 04:52:08,918 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 761 transitions. Word has length 52 [2021-11-19 04:52:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:08,918 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 761 transitions. [2021-11-19 04:52:08,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 761 transitions. [2021-11-19 04:52:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:52:08,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:08,921 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] [2021-11-19 04:52:08,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-19 04:52:08,922 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1444104729, now seen corresponding path program 1 times [2021-11-19 04:52:08,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:08,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524254405] [2021-11-19 04:52:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:08,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:08,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:08,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:08,974 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 04:52:08,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:08,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524254405] [2021-11-19 04:52:08,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524254405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:08,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:08,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:52:08,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314670713] [2021-11-19 04:52:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:08,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:08,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:08,978 INFO L87 Difference]: Start difference. First operand 583 states and 761 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:09,425 INFO L93 Difference]: Finished difference Result 700 states and 914 transitions. [2021-11-19 04:52:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-11-19 04:52:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:09,429 INFO L225 Difference]: With dead ends: 700 [2021-11-19 04:52:09,429 INFO L226 Difference]: Without dead ends: 692 [2021-11-19 04:52:09,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:09,440 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 287 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:09,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1110 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-19 04:52:09,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 611. [2021-11-19 04:52:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 519 states have (on average 1.2909441233140655) internal successors, (670), 525 states have internal predecessors, (670), 55 states have call successors, (55), 27 states have call predecessors, (55), 36 states have return successors, (69), 58 states have call predecessors, (69), 51 states have call successors, (69) [2021-11-19 04:52:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 794 transitions. [2021-11-19 04:52:09,516 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 794 transitions. Word has length 52 [2021-11-19 04:52:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:09,519 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 794 transitions. [2021-11-19 04:52:09,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 794 transitions. [2021-11-19 04:52:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:52:09,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:09,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:09,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-19 04:52:09,523 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2032610889, now seen corresponding path program 1 times [2021-11-19 04:52:09,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:09,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673930923] [2021-11-19 04:52:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:09,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:09,600 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 04:52:09,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:09,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673930923] [2021-11-19 04:52:09,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673930923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:09,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:09,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:09,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125796446] [2021-11-19 04:52:09,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:09,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:09,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:09,602 INFO L87 Difference]: Start difference. First operand 611 states and 794 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:10,299 INFO L93 Difference]: Finished difference Result 696 states and 908 transitions. [2021-11-19 04:52:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:10,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-11-19 04:52:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:10,302 INFO L225 Difference]: With dead ends: 696 [2021-11-19 04:52:10,303 INFO L226 Difference]: Without dead ends: 690 [2021-11-19 04:52:10,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:10,304 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 788 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:10,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1319 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:52:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-19 04:52:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 611. [2021-11-19 04:52:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 519 states have (on average 1.2890173410404624) internal successors, (669), 525 states have internal predecessors, (669), 55 states have call successors, (55), 27 states have call predecessors, (55), 36 states have return successors, (69), 58 states have call predecessors, (69), 51 states have call successors, (69) [2021-11-19 04:52:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 793 transitions. [2021-11-19 04:52:10,362 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 793 transitions. Word has length 53 [2021-11-19 04:52:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:10,363 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 793 transitions. [2021-11-19 04:52:10,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 793 transitions. [2021-11-19 04:52:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:52:10,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:10,366 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] [2021-11-19 04:52:10,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-19 04:52:10,367 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:10,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2028580847, now seen corresponding path program 1 times [2021-11-19 04:52:10,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:10,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617476349] [2021-11-19 04:52:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:10,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:10,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 04:52:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:10,597 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 04:52:10,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617476349] [2021-11-19 04:52:10,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617476349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:10,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:10,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-19 04:52:10,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748682243] [2021-11-19 04:52:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:10,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:52:10,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:52:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:52:10,601 INFO L87 Difference]: Start difference. First operand 611 states and 793 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:11,564 INFO L93 Difference]: Finished difference Result 643 states and 833 transitions. [2021-11-19 04:52:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:52:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-11-19 04:52:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:11,567 INFO L225 Difference]: With dead ends: 643 [2021-11-19 04:52:11,567 INFO L226 Difference]: Without dead ends: 620 [2021-11-19 04:52:11,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:52:11,569 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 328 mSDsluCounter, 3746 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 4172 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:11,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 4172 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-19 04:52:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 608. [2021-11-19 04:52:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 517 states have (on average 1.2882011605415862) internal successors, (666), 523 states have internal predecessors, (666), 54 states have call successors, (54), 27 states have call predecessors, (54), 36 states have return successors, (68), 57 states have call predecessors, (68), 50 states have call successors, (68) [2021-11-19 04:52:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 788 transitions. [2021-11-19 04:52:11,613 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 788 transitions. Word has length 55 [2021-11-19 04:52:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:11,613 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 788 transitions. [2021-11-19 04:52:11,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 788 transitions. [2021-11-19 04:52:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:52:11,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:11,616 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 04:52:11,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-19 04:52:11,616 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -926060850, now seen corresponding path program 1 times [2021-11-19 04:52:11,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:11,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542848682] [2021-11-19 04:52:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:11,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:11,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:52:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:11,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:11,788 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 04:52:11,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:11,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542848682] [2021-11-19 04:52:11,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542848682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:11,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:11,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:52:11,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448335150] [2021-11-19 04:52:11,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:11,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:52:11,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:11,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:52:11,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:11,791 INFO L87 Difference]: Start difference. First operand 608 states and 788 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:12,639 INFO L93 Difference]: Finished difference Result 635 states and 822 transitions. [2021-11-19 04:52:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-11-19 04:52:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:12,642 INFO L225 Difference]: With dead ends: 635 [2021-11-19 04:52:12,642 INFO L226 Difference]: Without dead ends: 610 [2021-11-19 04:52:12,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:52:12,643 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 116 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 3615 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:12,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 3615 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-19 04:52:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 598. [2021-11-19 04:52:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 509 states have (on average 1.2888015717092338) internal successors, (656), 515 states have internal predecessors, (656), 52 states have call successors, (52), 27 states have call predecessors, (52), 36 states have return successors, (66), 55 states have call predecessors, (66), 48 states have call successors, (66) [2021-11-19 04:52:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 774 transitions. [2021-11-19 04:52:12,692 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 774 transitions. Word has length 54 [2021-11-19 04:52:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:12,692 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 774 transitions. [2021-11-19 04:52:12,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 774 transitions. [2021-11-19 04:52:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:52:12,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:12,696 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 04:52:12,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-19 04:52:12,696 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1717160597, now seen corresponding path program 1 times [2021-11-19 04:52:12,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:12,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224835436] [2021-11-19 04:52:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:12,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:52:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,759 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 04:52:12,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:12,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224835436] [2021-11-19 04:52:12,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224835436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:12,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:12,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:12,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143299797] [2021-11-19 04:52:12,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:12,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:12,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:12,762 INFO L87 Difference]: Start difference. First operand 598 states and 774 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:13,097 INFO L93 Difference]: Finished difference Result 637 states and 820 transitions. [2021-11-19 04:52:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-11-19 04:52:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:13,100 INFO L225 Difference]: With dead ends: 637 [2021-11-19 04:52:13,100 INFO L226 Difference]: Without dead ends: 605 [2021-11-19 04:52:13,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:13,102 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 171 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:13,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1736 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-19 04:52:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 593. [2021-11-19 04:52:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 505 states have (on average 1.2891089108910891) internal successors, (651), 511 states have internal predecessors, (651), 51 states have call successors, (51), 27 states have call predecessors, (51), 36 states have return successors, (65), 54 states have call predecessors, (65), 47 states have call successors, (65) [2021-11-19 04:52:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 767 transitions. [2021-11-19 04:52:13,157 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 767 transitions. Word has length 54 [2021-11-19 04:52:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:13,157 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 767 transitions. [2021-11-19 04:52:13,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 767 transitions. [2021-11-19 04:52:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:52:13,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:13,160 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 04:52:13,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-19 04:52:13,161 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1513646241, now seen corresponding path program 1 times [2021-11-19 04:52:13,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:13,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576611566] [2021-11-19 04:52:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:13,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:52:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:13,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:13,277 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 04:52:13,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:13,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576611566] [2021-11-19 04:52:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576611566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:13,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:13,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:52:13,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076732256] [2021-11-19 04:52:13,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:13,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:52:13,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:52:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:13,279 INFO L87 Difference]: Start difference. First operand 593 states and 767 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:13,884 INFO L93 Difference]: Finished difference Result 628 states and 810 transitions. [2021-11-19 04:52:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:52:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-11-19 04:52:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:13,887 INFO L225 Difference]: With dead ends: 628 [2021-11-19 04:52:13,887 INFO L226 Difference]: Without dead ends: 602 [2021-11-19 04:52:13,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:52:13,888 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 232 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:13,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 3187 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:52:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-19 04:52:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2021-11-19 04:52:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 503 states have (on average 1.2882703777335984) internal successors, (648), 509 states have internal predecessors, (648), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2021-11-19 04:52:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 762 transitions. [2021-11-19 04:52:13,929 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 762 transitions. Word has length 54 [2021-11-19 04:52:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:13,929 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 762 transitions. [2021-11-19 04:52:13,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 762 transitions. [2021-11-19 04:52:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:52:13,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:13,932 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 04:52:13,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-19 04:52:13,933 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash 773886590, now seen corresponding path program 1 times [2021-11-19 04:52:13,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:13,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469908501] [2021-11-19 04:52:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:13,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:14,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:14,015 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 04:52:14,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:14,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469908501] [2021-11-19 04:52:14,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469908501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:14,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:14,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:14,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351294392] [2021-11-19 04:52:14,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:14,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:14,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:14,018 INFO L87 Difference]: Start difference. First operand 590 states and 762 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:14,808 INFO L93 Difference]: Finished difference Result 673 states and 872 transitions. [2021-11-19 04:52:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:52:14,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-11-19 04:52:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:14,811 INFO L225 Difference]: With dead ends: 673 [2021-11-19 04:52:14,812 INFO L226 Difference]: Without dead ends: 669 [2021-11-19 04:52:14,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:14,813 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 696 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:14,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 1461 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:52:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-19 04:52:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 588. [2021-11-19 04:52:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 501 states have (on average 1.2874251497005988) internal successors, (645), 507 states have internal predecessors, (645), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2021-11-19 04:52:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 759 transitions. [2021-11-19 04:52:14,877 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 759 transitions. Word has length 54 [2021-11-19 04:52:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:14,878 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 759 transitions. [2021-11-19 04:52:14,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 759 transitions. [2021-11-19 04:52:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:52:14,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:14,881 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 04:52:14,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-19 04:52:14,884 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash 774163420, now seen corresponding path program 1 times [2021-11-19 04:52:14,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:14,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900513854] [2021-11-19 04:52:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:14,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:14,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,060 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 04:52:15,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:15,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900513854] [2021-11-19 04:52:15,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900513854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:15,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:15,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:52:15,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811178894] [2021-11-19 04:52:15,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:15,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:52:15,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:52:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:15,063 INFO L87 Difference]: Start difference. First operand 588 states and 759 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:15,929 INFO L93 Difference]: Finished difference Result 610 states and 786 transitions. [2021-11-19 04:52:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:52:15,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-11-19 04:52:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:15,933 INFO L225 Difference]: With dead ends: 610 [2021-11-19 04:52:15,933 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 04:52:15,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:52:15,934 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 211 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:15,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2826 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 04:52:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 546. [2021-11-19 04:52:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 461 states have (on average 1.2776572668112798) internal successors, (589), 467 states have internal predecessors, (589), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2021-11-19 04:52:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 701 transitions. [2021-11-19 04:52:15,989 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 701 transitions. Word has length 54 [2021-11-19 04:52:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:15,989 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 701 transitions. [2021-11-19 04:52:15,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 701 transitions. [2021-11-19 04:52:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 04:52:15,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:15,992 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] [2021-11-19 04:52:15,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-19 04:52:15,993 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1341431007, now seen corresponding path program 1 times [2021-11-19 04:52:15,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:15,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540287054] [2021-11-19 04:52:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:15,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:52:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:52:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,195 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 04:52:16,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:16,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540287054] [2021-11-19 04:52:16,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540287054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:16,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:16,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:52:16,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689567021] [2021-11-19 04:52:16,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:16,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:16,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:16,198 INFO L87 Difference]: Start difference. First operand 546 states and 701 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:52:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:17,206 INFO L93 Difference]: Finished difference Result 601 states and 768 transitions. [2021-11-19 04:52:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-11-19 04:52:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:17,210 INFO L225 Difference]: With dead ends: 601 [2021-11-19 04:52:17,210 INFO L226 Difference]: Without dead ends: 581 [2021-11-19 04:52:17,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:52:17,211 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 256 mSDsluCounter, 3668 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 4070 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:17,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 4070 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:52:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-19 04:52:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 544. [2021-11-19 04:52:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 460 states have (on average 1.2760869565217392) internal successors, (587), 466 states have internal predecessors, (587), 49 states have call successors, (49), 27 states have call predecessors, (49), 34 states have return successors, (61), 50 states have call predecessors, (61), 45 states have call successors, (61) [2021-11-19 04:52:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 697 transitions. [2021-11-19 04:52:17,253 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 697 transitions. Word has length 59 [2021-11-19 04:52:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:17,253 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 697 transitions. [2021-11-19 04:52:17,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:52:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 697 transitions. [2021-11-19 04:52:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:52:17,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:17,255 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] [2021-11-19 04:52:17,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-19 04:52:17,256 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:17,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1350619309, now seen corresponding path program 1 times [2021-11-19 04:52:17,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:17,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363352700] [2021-11-19 04:52:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:17,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,340 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 04:52:17,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:17,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363352700] [2021-11-19 04:52:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363352700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:17,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:17,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:17,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198363711] [2021-11-19 04:52:17,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:17,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:17,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:17,344 INFO L87 Difference]: Start difference. First operand 544 states and 697 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:17,803 INFO L93 Difference]: Finished difference Result 605 states and 767 transitions. [2021-11-19 04:52:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:52:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-11-19 04:52:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:17,805 INFO L225 Difference]: With dead ends: 605 [2021-11-19 04:52:17,805 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 04:52:17,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:17,806 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 187 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:17,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1842 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 04:52:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 544. [2021-11-19 04:52:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 460 states have (on average 1.2739130434782608) internal successors, (586), 466 states have internal predecessors, (586), 49 states have call successors, (49), 27 states have call predecessors, (49), 34 states have return successors, (61), 50 states have call predecessors, (61), 45 states have call successors, (61) [2021-11-19 04:52:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 696 transitions. [2021-11-19 04:52:17,870 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 696 transitions. Word has length 56 [2021-11-19 04:52:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:17,871 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 696 transitions. [2021-11-19 04:52:17,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 696 transitions. [2021-11-19 04:52:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:52:17,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:17,873 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] [2021-11-19 04:52:17,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-19 04:52:17,874 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1373251563, now seen corresponding path program 1 times [2021-11-19 04:52:17,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:17,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104583419] [2021-11-19 04:52:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:17,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,077 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 04:52:18,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:18,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104583419] [2021-11-19 04:52:18,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104583419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:18,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:18,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:52:18,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183024843] [2021-11-19 04:52:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:18,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:18,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:18,081 INFO L87 Difference]: Start difference. First operand 544 states and 696 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:18,876 INFO L93 Difference]: Finished difference Result 599 states and 763 transitions. [2021-11-19 04:52:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-11-19 04:52:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:18,882 INFO L225 Difference]: With dead ends: 599 [2021-11-19 04:52:18,882 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 04:52:18,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:52:18,883 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 347 mSDsluCounter, 3145 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:18,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 3540 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:52:18,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 04:52:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 539. [2021-11-19 04:52:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 456 states have (on average 1.269736842105263) internal successors, (579), 462 states have internal predecessors, (579), 48 states have call successors, (48), 27 states have call predecessors, (48), 34 states have return successors, (59), 49 states have call predecessors, (59), 44 states have call successors, (59) [2021-11-19 04:52:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 686 transitions. [2021-11-19 04:52:18,937 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 686 transitions. Word has length 56 [2021-11-19 04:52:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:18,938 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 686 transitions. [2021-11-19 04:52:18,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 686 transitions. [2021-11-19 04:52:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:52:18,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:18,940 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] [2021-11-19 04:52:18,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-19 04:52:18,941 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash -801787505, now seen corresponding path program 1 times [2021-11-19 04:52:18,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:18,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476192713] [2021-11-19 04:52:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:18,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,015 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 04:52:19,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:19,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476192713] [2021-11-19 04:52:19,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476192713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:19,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:19,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:19,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629530395] [2021-11-19 04:52:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:19,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:19,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:19,018 INFO L87 Difference]: Start difference. First operand 539 states and 686 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:19,463 INFO L93 Difference]: Finished difference Result 582 states and 736 transitions. [2021-11-19 04:52:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:52:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-11-19 04:52:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:19,466 INFO L225 Difference]: With dead ends: 582 [2021-11-19 04:52:19,466 INFO L226 Difference]: Without dead ends: 545 [2021-11-19 04:52:19,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:19,468 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 168 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:19,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1932 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-19 04:52:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 533. [2021-11-19 04:52:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 451 states have (on average 1.270509977827051) internal successors, (573), 457 states have internal predecessors, (573), 47 states have call successors, (47), 27 states have call predecessors, (47), 34 states have return successors, (58), 48 states have call predecessors, (58), 43 states have call successors, (58) [2021-11-19 04:52:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 678 transitions. [2021-11-19 04:52:19,535 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 678 transitions. Word has length 56 [2021-11-19 04:52:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:19,536 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 678 transitions. [2021-11-19 04:52:19,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 678 transitions. [2021-11-19 04:52:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 04:52:19,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:19,539 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] [2021-11-19 04:52:19,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-19 04:52:19,539 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:19,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1511727278, now seen corresponding path program 1 times [2021-11-19 04:52:19,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:19,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152075602] [2021-11-19 04:52:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:19,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:52:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:52:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,620 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 04:52:19,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:19,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152075602] [2021-11-19 04:52:19,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152075602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:19,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:19,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:19,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14477351] [2021-11-19 04:52:19,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:19,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:19,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:19,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:19,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:19,623 INFO L87 Difference]: Start difference. First operand 533 states and 678 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:20,046 INFO L93 Difference]: Finished difference Result 576 states and 728 transitions. [2021-11-19 04:52:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:52:20,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-11-19 04:52:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:20,049 INFO L225 Difference]: With dead ends: 576 [2021-11-19 04:52:20,049 INFO L226 Difference]: Without dead ends: 533 [2021-11-19 04:52:20,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:20,051 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 261 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:20,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 1461 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-19 04:52:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 521. [2021-11-19 04:52:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 440 states have (on average 1.2659090909090909) internal successors, (557), 446 states have internal predecessors, (557), 46 states have call successors, (46), 27 states have call predecessors, (46), 34 states have return successors, (57), 47 states have call predecessors, (57), 42 states have call successors, (57) [2021-11-19 04:52:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 660 transitions. [2021-11-19 04:52:20,105 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 660 transitions. Word has length 58 [2021-11-19 04:52:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:20,105 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 660 transitions. [2021-11-19 04:52:20,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 660 transitions. [2021-11-19 04:52:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:52:20,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:20,108 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] [2021-11-19 04:52:20,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-19 04:52:20,108 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:20,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2069212948, now seen corresponding path program 1 times [2021-11-19 04:52:20,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:20,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075994648] [2021-11-19 04:52:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:20,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 04:52:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,363 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 04:52:20,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:20,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075994648] [2021-11-19 04:52:20,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075994648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:20,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:20,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 04:52:20,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670109244] [2021-11-19 04:52:20,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:20,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:52:20,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:52:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:20,367 INFO L87 Difference]: Start difference. First operand 521 states and 660 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:52:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:21,336 INFO L93 Difference]: Finished difference Result 549 states and 694 transitions. [2021-11-19 04:52:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:52:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2021-11-19 04:52:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:21,338 INFO L225 Difference]: With dead ends: 549 [2021-11-19 04:52:21,339 INFO L226 Difference]: Without dead ends: 528 [2021-11-19 04:52:21,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:52:21,340 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 200 mSDsluCounter, 2662 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:21,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 3023 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:52:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-19 04:52:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 516. [2021-11-19 04:52:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 437 states have (on average 1.265446224256293) internal successors, (553), 443 states have internal predecessors, (553), 44 states have call successors, (44), 27 states have call predecessors, (44), 34 states have return successors, (55), 45 states have call predecessors, (55), 40 states have call successors, (55) [2021-11-19 04:52:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 652 transitions. [2021-11-19 04:52:21,391 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 652 transitions. Word has length 64 [2021-11-19 04:52:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:21,391 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 652 transitions. [2021-11-19 04:52:21,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:52:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 652 transitions. [2021-11-19 04:52:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:52:21,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:21,405 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 04:52:21,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-19 04:52:21,406 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash 477751716, now seen corresponding path program 1 times [2021-11-19 04:52:21,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:21,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851934796] [2021-11-19 04:52:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:21,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 04:52:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,594 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 04:52:21,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:21,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851934796] [2021-11-19 04:52:21,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851934796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:21,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:21,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:52:21,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821220695] [2021-11-19 04:52:21,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:21,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:52:21,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:52:21,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:21,597 INFO L87 Difference]: Start difference. First operand 516 states and 652 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:22,371 INFO L93 Difference]: Finished difference Result 530 states and 670 transitions. [2021-11-19 04:52:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-11-19 04:52:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:22,374 INFO L225 Difference]: With dead ends: 530 [2021-11-19 04:52:22,374 INFO L226 Difference]: Without dead ends: 486 [2021-11-19 04:52:22,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:52:22,375 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 115 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:22,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 2803 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-19 04:52:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 474. [2021-11-19 04:52:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 400 states have (on average 1.2775) internal successors, (511), 405 states have internal predecessors, (511), 41 states have call successors, (41), 25 states have call predecessors, (41), 32 states have return successors, (53), 43 states have call predecessors, (53), 38 states have call successors, (53) [2021-11-19 04:52:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 605 transitions. [2021-11-19 04:52:22,418 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 605 transitions. Word has length 57 [2021-11-19 04:52:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:22,418 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 605 transitions. [2021-11-19 04:52:22,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 605 transitions. [2021-11-19 04:52:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 04:52:22,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:22,421 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] [2021-11-19 04:52:22,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-19 04:52:22,422 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash 999008539, now seen corresponding path program 1 times [2021-11-19 04:52:22,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:22,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438693715] [2021-11-19 04:52:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:22,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,608 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 04:52:22,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:22,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438693715] [2021-11-19 04:52:22,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438693715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:22,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:22,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:52:22,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433745315] [2021-11-19 04:52:22,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:22,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:52:22,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:52:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:22,611 INFO L87 Difference]: Start difference. First operand 474 states and 605 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:24,314 INFO L93 Difference]: Finished difference Result 967 states and 1234 transitions. [2021-11-19 04:52:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 04:52:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-11-19 04:52:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:24,318 INFO L225 Difference]: With dead ends: 967 [2021-11-19 04:52:24,318 INFO L226 Difference]: Without dead ends: 850 [2021-11-19 04:52:24,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:52:24,319 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 657 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:24,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 2411 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:52:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-11-19 04:52:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 657. [2021-11-19 04:52:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 549 states have (on average 1.2859744990892532) internal successors, (706), 560 states have internal predecessors, (706), 58 states have call successors, (58), 38 states have call predecessors, (58), 49 states have return successors, (78), 58 states have call predecessors, (78), 55 states have call successors, (78) [2021-11-19 04:52:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 842 transitions. [2021-11-19 04:52:24,389 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 842 transitions. Word has length 58 [2021-11-19 04:52:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:24,390 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 842 transitions. [2021-11-19 04:52:24,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 842 transitions. [2021-11-19 04:52:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 04:52:24,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:24,393 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] [2021-11-19 04:52:24,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-19 04:52:24,393 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1875027545, now seen corresponding path program 1 times [2021-11-19 04:52:24,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:24,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422159922] [2021-11-19 04:52:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:24,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,457 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 04:52:24,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:24,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422159922] [2021-11-19 04:52:24,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422159922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:24,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:24,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:24,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402321659] [2021-11-19 04:52:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:24,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:24,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:24,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:24,460 INFO L87 Difference]: Start difference. First operand 657 states and 842 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:25,144 INFO L93 Difference]: Finished difference Result 951 states and 1213 transitions. [2021-11-19 04:52:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:52:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-11-19 04:52:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:25,173 INFO L225 Difference]: With dead ends: 951 [2021-11-19 04:52:25,174 INFO L226 Difference]: Without dead ends: 867 [2021-11-19 04:52:25,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:25,175 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 907 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:25,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 1688 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:52:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-11-19 04:52:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 487. [2021-11-19 04:52:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 412 states have (on average 1.2718446601941749) internal successors, (524), 416 states have internal predecessors, (524), 41 states have call successors, (41), 27 states have call predecessors, (41), 33 states have return successors, (53), 43 states have call predecessors, (53), 38 states have call successors, (53) [2021-11-19 04:52:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 618 transitions. [2021-11-19 04:52:25,247 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 618 transitions. Word has length 58 [2021-11-19 04:52:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:25,247 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 618 transitions. [2021-11-19 04:52:25,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 618 transitions. [2021-11-19 04:52:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 04:52:25,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:25,250 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] [2021-11-19 04:52:25,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-19 04:52:25,250 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:25,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1125550286, now seen corresponding path program 1 times [2021-11-19 04:52:25,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:25,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685587437] [2021-11-19 04:52:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:25,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:25,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:52:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:25,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:25,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:25,433 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 04:52:25,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:25,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685587437] [2021-11-19 04:52:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685587437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:25,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:52:25,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653539422] [2021-11-19 04:52:25,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:25,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:25,436 INFO L87 Difference]: Start difference. First operand 487 states and 618 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:52:26,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:26,289 INFO L93 Difference]: Finished difference Result 522 states and 661 transitions. [2021-11-19 04:52:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:26,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2021-11-19 04:52:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:26,291 INFO L225 Difference]: With dead ends: 522 [2021-11-19 04:52:26,291 INFO L226 Difference]: Without dead ends: 490 [2021-11-19 04:52:26,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:52:26,291 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 209 mSDsluCounter, 2553 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2881 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:26,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 2881 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:52:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-19 04:52:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 478. [2021-11-19 04:52:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 405 states have (on average 1.2691358024691357) internal successors, (514), 409 states have internal predecessors, (514), 39 states have call successors, (39), 27 states have call predecessors, (39), 33 states have return successors, (50), 41 states have call predecessors, (50), 36 states have call successors, (50) [2021-11-19 04:52:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 603 transitions. [2021-11-19 04:52:26,338 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 603 transitions. Word has length 60 [2021-11-19 04:52:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:26,338 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 603 transitions. [2021-11-19 04:52:26,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:52:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 603 transitions. [2021-11-19 04:52:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 04:52:26,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:26,340 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] [2021-11-19 04:52:26,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-19 04:52:26,340 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2088220112, now seen corresponding path program 1 times [2021-11-19 04:52:26,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:26,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163305196] [2021-11-19 04:52:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:26,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:52:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-19 04:52:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,405 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 04:52:26,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:26,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163305196] [2021-11-19 04:52:26,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163305196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:26,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:26,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:26,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317723710] [2021-11-19 04:52:26,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:26,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:26,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:26,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:26,407 INFO L87 Difference]: Start difference. First operand 478 states and 603 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:26,672 INFO L93 Difference]: Finished difference Result 517 states and 647 transitions. [2021-11-19 04:52:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2021-11-19 04:52:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:26,687 INFO L225 Difference]: With dead ends: 517 [2021-11-19 04:52:26,688 INFO L226 Difference]: Without dead ends: 480 [2021-11-19 04:52:26,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:26,689 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 79 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:26,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1488 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:52:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-19 04:52:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 468. [2021-11-19 04:52:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 396 states have (on average 1.27020202020202) internal successors, (503), 400 states have internal predecessors, (503), 38 states have call successors, (38), 27 states have call predecessors, (38), 33 states have return successors, (48), 40 states have call predecessors, (48), 35 states have call successors, (48) [2021-11-19 04:52:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 589 transitions. [2021-11-19 04:52:26,756 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 589 transitions. Word has length 58 [2021-11-19 04:52:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:26,756 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 589 transitions. [2021-11-19 04:52:26,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:52:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 589 transitions. [2021-11-19 04:52:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 04:52:26,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:26,758 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:52:26,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-19 04:52:26,759 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:26,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1074633973, now seen corresponding path program 1 times [2021-11-19 04:52:26,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:26,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885981296] [2021-11-19 04:52:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:26,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:52:26,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:26,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885981296] [2021-11-19 04:52:26,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885981296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:26,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:26,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:26,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486493423] [2021-11-19 04:52:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:26,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:26,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:26,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:26,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:26,852 INFO L87 Difference]: Start difference. First operand 468 states and 589 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:27,118 INFO L93 Difference]: Finished difference Result 507 states and 633 transitions. [2021-11-19 04:52:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:27,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2021-11-19 04:52:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:27,119 INFO L225 Difference]: With dead ends: 507 [2021-11-19 04:52:27,119 INFO L226 Difference]: Without dead ends: 470 [2021-11-19 04:52:27,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:27,120 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 139 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:27,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1270 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:52:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-19 04:52:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 458. [2021-11-19 04:52:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 388 states have (on average 1.2706185567010309) internal successors, (493), 392 states have internal predecessors, (493), 36 states have call successors, (36), 27 states have call predecessors, (36), 33 states have return successors, (46), 38 states have call predecessors, (46), 33 states have call successors, (46) [2021-11-19 04:52:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 575 transitions. [2021-11-19 04:52:27,164 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 575 transitions. Word has length 60 [2021-11-19 04:52:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:27,164 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 575 transitions. [2021-11-19 04:52:27,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 575 transitions. [2021-11-19 04:52:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 04:52:27,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:27,166 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] [2021-11-19 04:52:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-19 04:52:27,167 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash 175179390, now seen corresponding path program 1 times [2021-11-19 04:52:27,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:27,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724279788] [2021-11-19 04:52:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:27,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 04:52:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,341 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 04:52:27,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:27,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724279788] [2021-11-19 04:52:27,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724279788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:27,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:27,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:52:27,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973658739] [2021-11-19 04:52:27,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:27,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:52:27,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:52:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:27,344 INFO L87 Difference]: Start difference. First operand 458 states and 575 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:28,507 INFO L93 Difference]: Finished difference Result 798 states and 1014 transitions. [2021-11-19 04:52:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:52:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2021-11-19 04:52:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:28,509 INFO L225 Difference]: With dead ends: 798 [2021-11-19 04:52:28,509 INFO L226 Difference]: Without dead ends: 693 [2021-11-19 04:52:28,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:52:28,510 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 705 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:28,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 2331 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:52:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-11-19 04:52:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 352. [2021-11-19 04:52:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 294 states have (on average 1.2891156462585034) internal successors, (379), 297 states have internal predecessors, (379), 31 states have call successors, (31), 23 states have call predecessors, (31), 26 states have return successors, (39), 31 states have call predecessors, (39), 29 states have call successors, (39) [2021-11-19 04:52:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 449 transitions. [2021-11-19 04:52:28,555 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 449 transitions. Word has length 60 [2021-11-19 04:52:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:28,555 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 449 transitions. [2021-11-19 04:52:28,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 449 transitions. [2021-11-19 04:52:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 04:52:28,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:28,557 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] [2021-11-19 04:52:28,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-19 04:52:28,558 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268864, now seen corresponding path program 1 times [2021-11-19 04:52:28,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:28,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954950902] [2021-11-19 04:52:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:28,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:52:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 04:52:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,733 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 04:52:28,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:28,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954950902] [2021-11-19 04:52:28,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954950902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:28,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:28,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:52:28,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346823902] [2021-11-19 04:52:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:28,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:28,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:28,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:28,742 INFO L87 Difference]: Start difference. First operand 352 states and 449 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:52:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:29,482 INFO L93 Difference]: Finished difference Result 384 states and 486 transitions. [2021-11-19 04:52:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:29,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2021-11-19 04:52:29,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:29,487 INFO L225 Difference]: With dead ends: 384 [2021-11-19 04:52:29,487 INFO L226 Difference]: Without dead ends: 362 [2021-11-19 04:52:29,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:52:29,488 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 194 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:29,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 2039 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:52:29,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-19 04:52:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 350. [2021-11-19 04:52:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 292 states have (on average 1.2876712328767124) internal successors, (376), 295 states have internal predecessors, (376), 31 states have call successors, (31), 23 states have call predecessors, (31), 26 states have return successors, (39), 31 states have call predecessors, (39), 29 states have call successors, (39) [2021-11-19 04:52:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 446 transitions. [2021-11-19 04:52:29,537 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 446 transitions. Word has length 62 [2021-11-19 04:52:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:29,537 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 446 transitions. [2021-11-19 04:52:29,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:52:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 446 transitions. [2021-11-19 04:52:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:52:29,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:29,540 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] [2021-11-19 04:52:29,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-19 04:52:29,540 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash 224602701, now seen corresponding path program 1 times [2021-11-19 04:52:29,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:29,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432382121] [2021-11-19 04:52:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:29,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:52:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,771 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 04:52:29,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:29,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432382121] [2021-11-19 04:52:29,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432382121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:29,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:29,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:52:29,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649351335] [2021-11-19 04:52:29,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:29,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:52:29,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:52:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:29,774 INFO L87 Difference]: Start difference. First operand 350 states and 446 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:52:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:30,290 INFO L93 Difference]: Finished difference Result 547 states and 704 transitions. [2021-11-19 04:52:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-11-19 04:52:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:30,302 INFO L225 Difference]: With dead ends: 547 [2021-11-19 04:52:30,302 INFO L226 Difference]: Without dead ends: 355 [2021-11-19 04:52:30,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:30,306 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 146 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:30,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1321 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-19 04:52:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 343. [2021-11-19 04:52:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 285 states have (on average 1.280701754385965) internal successors, (365), 288 states have internal predecessors, (365), 31 states have call successors, (31), 23 states have call predecessors, (31), 26 states have return successors, (39), 31 states have call predecessors, (39), 29 states have call successors, (39) [2021-11-19 04:52:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 435 transitions. [2021-11-19 04:52:30,392 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 435 transitions. Word has length 64 [2021-11-19 04:52:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:30,393 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 435 transitions. [2021-11-19 04:52:30,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:52:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 435 transitions. [2021-11-19 04:52:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:52:30,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:30,396 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] [2021-11-19 04:52:30,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-19 04:52:30,396 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1752625095, now seen corresponding path program 1 times [2021-11-19 04:52:30,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:30,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833373295] [2021-11-19 04:52:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:30,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 04:52:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,499 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 04:52:30,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:30,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833373295] [2021-11-19 04:52:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833373295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:30,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:30,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:30,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648148749] [2021-11-19 04:52:30,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:30,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:30,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:30,502 INFO L87 Difference]: Start difference. First operand 343 states and 435 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:52:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:30,904 INFO L93 Difference]: Finished difference Result 376 states and 471 transitions. [2021-11-19 04:52:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:30,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2021-11-19 04:52:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:30,906 INFO L225 Difference]: With dead ends: 376 [2021-11-19 04:52:30,906 INFO L226 Difference]: Without dead ends: 308 [2021-11-19 04:52:30,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:30,907 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 95 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:30,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1131 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-19 04:52:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 302. [2021-11-19 04:52:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 252 states have (on average 1.2738095238095237) internal successors, (321), 255 states have internal predecessors, (321), 25 states have call successors, (25), 21 states have call predecessors, (25), 24 states have return successors, (32), 25 states have call predecessors, (32), 23 states have call successors, (32) [2021-11-19 04:52:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 378 transitions. [2021-11-19 04:52:30,969 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 378 transitions. Word has length 63 [2021-11-19 04:52:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:30,969 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 378 transitions. [2021-11-19 04:52:30,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:52:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 378 transitions. [2021-11-19 04:52:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 04:52:30,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:30,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:30,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-19 04:52:30,972 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1823600415, now seen corresponding path program 1 times [2021-11-19 04:52:30,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:30,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242823896] [2021-11-19 04:52:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:30,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:31,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:52:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:52:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:31,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 04:52:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:52:31,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:31,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242823896] [2021-11-19 04:52:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242823896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:31,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483769361] [2021-11-19 04:52:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:31,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:31,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:31,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:52:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:52:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:31,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:31,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483769361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:31,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:31,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-11-19 04:52:31,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790250970] [2021-11-19 04:52:31,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:31,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:31,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:31,534 INFO L87 Difference]: Start difference. First operand 302 states and 378 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:31,605 INFO L93 Difference]: Finished difference Result 325 states and 400 transitions. [2021-11-19 04:52:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2021-11-19 04:52:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:31,607 INFO L225 Difference]: With dead ends: 325 [2021-11-19 04:52:31,607 INFO L226 Difference]: Without dead ends: 264 [2021-11-19 04:52:31,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:31,608 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 0 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:31,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 719 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-19 04:52:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-11-19 04:52:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.3) internal successors, (286), 222 states have internal predecessors, (286), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2021-11-19 04:52:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 336 transitions. [2021-11-19 04:52:31,669 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 336 transitions. Word has length 62 [2021-11-19 04:52:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:31,670 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 336 transitions. [2021-11-19 04:52:31,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:52:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 336 transitions. [2021-11-19 04:52:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:52:31,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:31,671 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 04:52:31,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:31,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-19 04:52:31,897 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:31,898 INFO L85 PathProgramCache]: Analyzing trace with hash 585691284, now seen corresponding path program 1 times [2021-11-19 04:52:31,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:31,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340171312] [2021-11-19 04:52:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:31,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:31,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,083 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 04:52:32,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:32,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340171312] [2021-11-19 04:52:32,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340171312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:32,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:32,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:52:32,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095172298] [2021-11-19 04:52:32,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:32,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:52:32,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:52:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:32,086 INFO L87 Difference]: Start difference. First operand 264 states and 336 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:52:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:32,525 INFO L93 Difference]: Finished difference Result 455 states and 585 transitions. [2021-11-19 04:52:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:52:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2021-11-19 04:52:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:32,527 INFO L225 Difference]: With dead ends: 455 [2021-11-19 04:52:32,527 INFO L226 Difference]: Without dead ends: 270 [2021-11-19 04:52:32,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:52:32,528 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 244 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:32,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 733 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-19 04:52:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-11-19 04:52:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.2954545454545454) internal successors, (285), 222 states have internal predecessors, (285), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2021-11-19 04:52:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2021-11-19 04:52:32,576 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 68 [2021-11-19 04:52:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:32,577 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2021-11-19 04:52:32,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:52:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2021-11-19 04:52:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 04:52:32,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:32,579 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] [2021-11-19 04:52:32,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-19 04:52:32,579 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1800918031, now seen corresponding path program 1 times [2021-11-19 04:52:32,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:32,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546408935] [2021-11-19 04:52:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:32,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,720 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 04:52:32,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:32,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546408935] [2021-11-19 04:52:32,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546408935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:32,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:32,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:52:32,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643075714] [2021-11-19 04:52:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:32,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:52:32,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:52:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:52:32,723 INFO L87 Difference]: Start difference. First operand 264 states and 335 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, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 04:52:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:33,024 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2021-11-19 04:52:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:52:33,025 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, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2021-11-19 04:52:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:33,026 INFO L225 Difference]: With dead ends: 343 [2021-11-19 04:52:33,026 INFO L226 Difference]: Without dead ends: 216 [2021-11-19 04:52:33,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:33,027 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 72 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:33,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 670 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:52:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-19 04:52:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2021-11-19 04:52:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 146 states have internal predecessors, (179), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2021-11-19 04:52:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-19 04:52:33,060 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 70 [2021-11-19 04:52:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:33,060 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-19 04:52:33,060 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, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 04:52:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-19 04:52:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 04:52:33,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:33,062 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 04:52:33,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-19 04:52:33,062 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1069664757, now seen corresponding path program 1 times [2021-11-19 04:52:33,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:33,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895225722] [2021-11-19 04:52:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:33,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:52:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,230 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 04:52:33,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:33,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895225722] [2021-11-19 04:52:33,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895225722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:33,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:33,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:52:33,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207528394] [2021-11-19 04:52:33,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:33,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:52:33,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:52:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:33,233 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:52:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:33,651 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2021-11-19 04:52:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2021-11-19 04:52:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:33,653 INFO L225 Difference]: With dead ends: 224 [2021-11-19 04:52:33,653 INFO L226 Difference]: Without dead ends: 185 [2021-11-19 04:52:33,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:52:33,654 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 174 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:33,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 854 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-19 04:52:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2021-11-19 04:52:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 144 states have internal predecessors, (172), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2021-11-19 04:52:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2021-11-19 04:52:33,680 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 84 [2021-11-19 04:52:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:33,680 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2021-11-19 04:52:33,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:52:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2021-11-19 04:52:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 04:52:33,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:33,681 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] [2021-11-19 04:52:33,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-19 04:52:33,682 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1463540250, now seen corresponding path program 1 times [2021-11-19 04:52:33,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:33,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616468980] [2021-11-19 04:52:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:33,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 04:52:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:52:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:33,843 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 04:52:33,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:33,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616468980] [2021-11-19 04:52:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616468980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:33,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:33,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:52:33,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45143448] [2021-11-19 04:52:33,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:33,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:52:33,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:33,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:52:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:33,846 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:52:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:34,162 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2021-11-19 04:52:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:52:34,163 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), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2021-11-19 04:52:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:34,164 INFO L225 Difference]: With dead ends: 201 [2021-11-19 04:52:34,164 INFO L226 Difference]: Without dead ends: 153 [2021-11-19 04:52:34,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:52:34,165 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 131 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:34,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 840 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:52:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-19 04:52:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2021-11-19 04:52:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 117 states have internal predecessors, (135), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 04:52:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-11-19 04:52:34,187 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 86 [2021-11-19 04:52:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:34,188 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-11-19 04:52:34,188 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), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:52:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-11-19 04:52:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:52:34,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:34,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:34,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-19 04:52:34,190 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1416419599, now seen corresponding path program 1 times [2021-11-19 04:52:34,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:34,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717327177] [2021-11-19 04:52:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:34,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 04:52:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:52:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 04:52:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:34,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:34,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717327177] [2021-11-19 04:52:34,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717327177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:34,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776634097] [2021-11-19 04:52:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:34,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:34,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:34,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:52:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:34,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:52:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:52:34,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:34,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776634097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:34,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:34,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-19 04:52:34,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175925668] [2021-11-19 04:52:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:34,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:52:34,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:52:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:34,795 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:34,830 INFO L93 Difference]: Finished difference Result 205 states and 238 transitions. [2021-11-19 04:52:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:52:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-11-19 04:52:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:34,832 INFO L225 Difference]: With dead ends: 205 [2021-11-19 04:52:34,832 INFO L226 Difference]: Without dead ends: 170 [2021-11-19 04:52:34,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:34,833 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 18 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:34,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 232 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-19 04:52:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-11-19 04:52:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.152) internal successors, (144), 125 states have internal predecessors, (144), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 04:52:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2021-11-19 04:52:34,856 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 103 [2021-11-19 04:52:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:34,857 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2021-11-19 04:52:34,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2021-11-19 04:52:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:52:34,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:34,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:34,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:35,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:35,078 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash -479392400, now seen corresponding path program 1 times [2021-11-19 04:52:35,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:35,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117739315] [2021-11-19 04:52:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:35,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 04:52:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:52:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 04:52:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:35,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:35,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117739315] [2021-11-19 04:52:35,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117739315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:35,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61456347] [2021-11-19 04:52:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:35,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:35,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:35,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:35,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:52:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:52:35,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:52:35,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:35,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61456347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:35,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:35,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-19 04:52:35,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866481818] [2021-11-19 04:52:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:35,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:52:35,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:52:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:35,634 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:35,670 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2021-11-19 04:52:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:52:35,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-11-19 04:52:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:35,671 INFO L225 Difference]: With dead ends: 203 [2021-11-19 04:52:35,672 INFO L226 Difference]: Without dead ends: 170 [2021-11-19 04:52:35,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:52:35,672 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:35,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 255 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-19 04:52:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-11-19 04:52:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.12) internal successors, (140), 125 states have internal predecessors, (140), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 04:52:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2021-11-19 04:52:35,695 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 103 [2021-11-19 04:52:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:35,698 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2021-11-19 04:52:35,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2021-11-19 04:52:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:52:35,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:35,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:35,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:35,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:35,913 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash 506808435, now seen corresponding path program 1 times [2021-11-19 04:52:35,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:35,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279755215] [2021-11-19 04:52:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:35,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:35,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 04:52:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:52:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 04:52:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:36,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:36,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279755215] [2021-11-19 04:52:36,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279755215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:36,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810503] [2021-11-19 04:52:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:36,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:36,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:36,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:36,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:52:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:52:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:52:36,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:36,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:36,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-19 04:52:36,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639058490] [2021-11-19 04:52:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:36,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:36,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:36,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:36,581 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:52:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:36,727 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2021-11-19 04:52:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2021-11-19 04:52:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:36,729 INFO L225 Difference]: With dead ends: 283 [2021-11-19 04:52:36,729 INFO L226 Difference]: Without dead ends: 151 [2021-11-19 04:52:36,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:36,730 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 144 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:36,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 214 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-19 04:52:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-19 04:52:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.104) internal successors, (138), 125 states have internal predecessors, (138), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 04:52:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2021-11-19 04:52:36,760 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 103 [2021-11-19 04:52:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:36,760 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2021-11-19 04:52:36,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:52:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2021-11-19 04:52:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 04:52:36,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:36,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:36,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:36,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa6d236-881d-4b41-864e-4bee6aa896ab/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:36,977 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1772033550, now seen corresponding path program 1 times [2021-11-19 04:52:36,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:36,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812376633] [2021-11-19 04:52:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:36,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-19 04:52:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:52:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:52:37,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:37,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812376633] [2021-11-19 04:52:37,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812376633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:37,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:37,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:52:37,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548302606] [2021-11-19 04:52:37,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:37,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:52:37,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:52:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:37,172 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:37,696 INFO L93 Difference]: Finished difference Result 300 states and 328 transitions. [2021-11-19 04:52:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:52:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2021-11-19 04:52:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:37,697 INFO L225 Difference]: With dead ends: 300 [2021-11-19 04:52:37,698 INFO L226 Difference]: Without dead ends: 151 [2021-11-19 04:52:37,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:52:37,699 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 167 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:37,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 678 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-19 04:52:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-19 04:52:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.096) internal successors, (137), 125 states have internal predecessors, (137), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 04:52:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2021-11-19 04:52:37,760 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 104 [2021-11-19 04:52:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:37,760 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2021-11-19 04:52:37,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2021-11-19 04:52:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 04:52:37,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:37,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:37,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-19 04:52:37,778 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash 125463216, now seen corresponding path program 1 times [2021-11-19 04:52:37,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:37,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118169549] [2021-11-19 04:52:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:37,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:52:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-19 04:52:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:52:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:52:38,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:38,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118169549] [2021-11-19 04:52:38,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118169549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:38,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:38,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:52:38,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641981771] [2021-11-19 04:52:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:38,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:38,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:38,073 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:38,625 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2021-11-19 04:52:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:52:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2021-11-19 04:52:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:38,626 INFO L225 Difference]: With dead ends: 151 [2021-11-19 04:52:38,626 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 04:52:38,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:52:38,627 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 151 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:38,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 635 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 04:52:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 04:52:38,628 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 04:52:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 04:52:38,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-11-19 04:52:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:38,629 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 04:52:38,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:52:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 04:52:38,629 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 04:52:38,632 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 04:52:38,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-19 04:52:38,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 04:58:05,187 WARN L227 SmtUtils]: Spent 5.44m on a formula simplification. DAG size of input: 271 DAG size of output: 270 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)