./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b15a3429ae983cb571408e453cffd56861eca4f5fc7e760aad97ad24a44474ad --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:44:37,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:44:37,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:44:37,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:44:37,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:44:37,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:44:37,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:44:37,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:44:37,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:44:37,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:44:37,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:44:37,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:44:37,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:44:37,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:44:37,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:44:37,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:44:37,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:44:37,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:44:37,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:44:37,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:44:37,274 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:44:37,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:44:37,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:44:37,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:44:37,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:44:37,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:44:37,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:44:37,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:44:37,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:44:37,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:44:37,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:44:37,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:44:37,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:44:37,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:44:37,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:44:37,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:44:37,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:44:37,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:44:37,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:44:37,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:44:37,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:44:37,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:44:37,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:44:37,311 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:44:37,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:44:37,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:44:37,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:44:37,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:44:37,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:44:37,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:44:37,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:44:37,313 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:44:37,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:44:37,314 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:44:37,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:44:37,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:44:37,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:44:37,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:44:37,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:44:37,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:44:37,315 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:44:37,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:44:37,316 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:44:37,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:44:37,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:44:37,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:44:37,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:44:37,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:44:37,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:44:37,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:44:37,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:44:37,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:44:37,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:44:37,318 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:44:37,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:44:37,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:44:37,318 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b15a3429ae983cb571408e453cffd56861eca4f5fc7e760aad97ad24a44474ad [2022-07-11 23:44:37,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:44:37,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:44:37,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:44:37,502 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:44:37,503 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:44:37,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-07-11 23:44:37,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abfd9bc7/061859286c02469f8278b16e5c3dde86/FLAG6baa90ab1 [2022-07-11 23:44:37,963 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:44:37,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-07-11 23:44:37,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abfd9bc7/061859286c02469f8278b16e5c3dde86/FLAG6baa90ab1 [2022-07-11 23:44:37,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abfd9bc7/061859286c02469f8278b16e5c3dde86 [2022-07-11 23:44:37,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:44:37,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:44:37,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:44:37,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:44:38,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:44:38,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:44:37" (1/1) ... [2022-07-11 23:44:38,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48aa137a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38, skipping insertion in model container [2022-07-11 23:44:38,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:44:37" (1/1) ... [2022-07-11 23:44:38,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:44:38,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:44:38,292 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-07-11 23:44:38,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:44:38,299 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:44:38,347 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-07-11 23:44:38,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:44:38,358 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:44:38,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38 WrapperNode [2022-07-11 23:44:38,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:44:38,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:44:38,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:44:38,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:44:38,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,420 INFO L137 Inliner]: procedures = 41, calls = 76, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 1331 [2022-07-11 23:44:38,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:44:38,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:44:38,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:44:38,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:44:38,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:44:38,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:44:38,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:44:38,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:44:38,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (1/1) ... [2022-07-11 23:44:38,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:44:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:44:38,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:44:38,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:44:38,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:44:38,534 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-11 23:44:38,534 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-11 23:44:38,534 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-11 23:44:38,534 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-11 23:44:38,534 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-11 23:44:38,535 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-11 23:44:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-11 23:44:38,536 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-11 23:44:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-11 23:44:38,536 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-11 23:44:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:44:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-11 23:44:38,537 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-11 23:44:38,537 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-11 23:44:38,537 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-11 23:44:38,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:44:38,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:44:38,694 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:44:38,695 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:44:38,699 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,757 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-11 23:44:38,758 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-11 23:44:38,758 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,765 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-11 23:44:38,765 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-11 23:44:38,776 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,782 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,790 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,792 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,795 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,796 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:38,799 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:39,131 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##170: assume !false; [2022-07-11 23:44:39,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##180: assume false; [2022-07-11 23:44:39,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##181: assume !false; [2022-07-11 23:44:39,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##67: assume !false; [2022-07-11 23:44:39,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##66: assume false; [2022-07-11 23:44:39,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##127: assume !false; [2022-07-11 23:44:39,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-11 23:44:39,133 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-11 23:44:39,133 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-07-11 23:44:39,133 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-07-11 23:44:39,133 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##169: assume false; [2022-07-11 23:44:39,133 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##236: assume !false; [2022-07-11 23:44:39,133 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##235: assume false; [2022-07-11 23:44:39,133 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##126: assume false; [2022-07-11 23:44:39,136 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:39,173 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-07-11 23:44:39,173 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-07-11 23:44:39,176 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:39,177 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:39,178 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:44:39,203 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-11 23:44:39,204 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-11 23:44:39,204 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-11 23:44:39,204 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-11 23:44:39,205 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-11 23:44:39,205 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-11 23:44:39,245 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:44:39,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:44:39,257 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:44:39,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:44:39 BoogieIcfgContainer [2022-07-11 23:44:39,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:44:39,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:44:39,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:44:39,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:44:39,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:44:37" (1/3) ... [2022-07-11 23:44:39,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0b757f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:44:39, skipping insertion in model container [2022-07-11 23:44:39,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:44:38" (2/3) ... [2022-07-11 23:44:39,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0b757f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:44:39, skipping insertion in model container [2022-07-11 23:44:39,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:44:39" (3/3) ... [2022-07-11 23:44:39,266 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2022-07-11 23:44:39,275 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:44:39,275 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:44:39,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:44:39,320 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11b601b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@602d4cc1 [2022-07-11 23:44:39,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:44:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 318 states, 259 states have (on average 1.5212355212355213) internal successors, (394), 284 states have internal predecessors, (394), 50 states have call successors, (50), 7 states have call predecessors, (50), 7 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) [2022-07-11 23:44:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-11 23:44:39,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:39,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:39,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -581881369, now seen corresponding path program 1 times [2022-07-11 23:44:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:39,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612510955] [2022-07-11 23:44:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612510955] [2022-07-11 23:44:39,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612510955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:39,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:39,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:44:39,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019323048] [2022-07-11 23:44:39,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:39,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:44:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:44:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:39,535 INFO L87 Difference]: Start difference. First operand has 318 states, 259 states have (on average 1.5212355212355213) internal successors, (394), 284 states have internal predecessors, (394), 50 states have call successors, (50), 7 states have call predecessors, (50), 7 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) 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) [2022-07-11 23:44:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:39,626 INFO L93 Difference]: Finished difference Result 511 states and 794 transitions. [2022-07-11 23:44:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:44:39,634 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 [2022-07-11 23:44:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:39,642 INFO L225 Difference]: With dead ends: 511 [2022-07-11 23:44:39,642 INFO L226 Difference]: Without dead ends: 310 [2022-07-11 23:44:39,648 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:44:39,650 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 261 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 629 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-07-11 23:44:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-07-11 23:44:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 253 states have (on average 1.4782608695652173) internal successors, (374), 276 states have internal predecessors, (374), 50 states have call successors, (50), 7 states have call predecessors, (50), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-11 23:44:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 453 transitions. [2022-07-11 23:44:39,698 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 453 transitions. Word has length 13 [2022-07-11 23:44:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:39,698 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 453 transitions. [2022-07-11 23:44:39,698 INFO L496 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) [2022-07-11 23:44:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 453 transitions. [2022-07-11 23:44:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-11 23:44:39,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:39,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:39,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:44:39,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1536856865, now seen corresponding path program 1 times [2022-07-11 23:44:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77092538] [2022-07-11 23:44:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:39,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:39,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77092538] [2022-07-11 23:44:39,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77092538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:39,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:39,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:44:39,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306843449] [2022-07-11 23:44:39,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:39,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:44:39,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:39,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:44:39,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:39,745 INFO L87 Difference]: Start difference. First operand 310 states and 453 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (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) [2022-07-11 23:44:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:39,862 INFO L93 Difference]: Finished difference Result 558 states and 805 transitions. [2022-07-11 23:44:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:44:39,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (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 16 [2022-07-11 23:44:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:39,866 INFO L225 Difference]: With dead ends: 558 [2022-07-11 23:44:39,866 INFO L226 Difference]: Without dead ends: 428 [2022-07-11 23:44:39,867 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:44:39,867 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 359 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:39,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 752 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-11 23:44:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 411. [2022-07-11 23:44:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 353 states have (on average 1.4022662889518414) internal successors, (495), 356 states have internal predecessors, (495), 48 states have call successors, (48), 11 states have call predecessors, (48), 9 states have return successors, (52), 44 states have call predecessors, (52), 37 states have call successors, (52) [2022-07-11 23:44:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 595 transitions. [2022-07-11 23:44:39,907 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 595 transitions. Word has length 16 [2022-07-11 23:44:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:39,907 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 595 transitions. [2022-07-11 23:44:39,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (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) [2022-07-11 23:44:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 595 transitions. [2022-07-11 23:44:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:44:39,909 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:39,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:39,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:44:39,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:39,910 INFO L85 PathProgramCache]: Analyzing trace with hash -866854987, now seen corresponding path program 1 times [2022-07-11 23:44:39,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:39,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715728156] [2022-07-11 23:44:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:39,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:39,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:39,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715728156] [2022-07-11 23:44:39,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715728156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:39,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:39,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:44:39,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679100721] [2022-07-11 23:44:39,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:39,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:44:39,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:44:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:39,997 INFO L87 Difference]: Start difference. First operand 411 states and 595 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-07-11 23:44:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:40,023 INFO L93 Difference]: Finished difference Result 516 states and 730 transitions. [2022-07-11 23:44:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:44:40,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 19 [2022-07-11 23:44:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:40,026 INFO L225 Difference]: With dead ends: 516 [2022-07-11 23:44:40,026 INFO L226 Difference]: Without dead ends: 497 [2022-07-11 23:44:40,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:40,028 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 407 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:40,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 540 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-07-11 23:44:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 459. [2022-07-11 23:44:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 394 states have (on average 1.3959390862944163) internal successors, (550), 404 states have internal predecessors, (550), 50 states have call successors, (50), 14 states have call predecessors, (50), 14 states have return successors, (59), 43 states have call predecessors, (59), 41 states have call successors, (59) [2022-07-11 23:44:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 659 transitions. [2022-07-11 23:44:40,063 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 659 transitions. Word has length 19 [2022-07-11 23:44:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:40,064 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 659 transitions. [2022-07-11 23:44:40,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-07-11 23:44:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 659 transitions. [2022-07-11 23:44:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-11 23:44:40,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:40,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:40,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:44:40,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash 122564178, now seen corresponding path program 1 times [2022-07-11 23:44:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:40,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338255506] [2022-07-11 23:44:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:40,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:40,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:40,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338255506] [2022-07-11 23:44:40,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338255506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:40,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:40,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:44:40,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744375904] [2022-07-11 23:44:40,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:40,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:44:40,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:44:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:40,128 INFO L87 Difference]: Start difference. First operand 459 states and 659 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-07-11 23:44:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:40,169 INFO L93 Difference]: Finished difference Result 861 states and 1224 transitions. [2022-07-11 23:44:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:44:40,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 22 [2022-07-11 23:44:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:40,172 INFO L225 Difference]: With dead ends: 861 [2022-07-11 23:44:40,173 INFO L226 Difference]: Without dead ends: 638 [2022-07-11 23:44:40,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:40,174 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 394 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:40,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 655 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-07-11 23:44:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 613. [2022-07-11 23:44:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 531 states have (on average 1.384180790960452) internal successors, (735), 538 states have internal predecessors, (735), 60 states have call successors, (60), 22 states have call predecessors, (60), 21 states have return successors, (80), 55 states have call predecessors, (80), 53 states have call successors, (80) [2022-07-11 23:44:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 875 transitions. [2022-07-11 23:44:40,209 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 875 transitions. Word has length 22 [2022-07-11 23:44:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:40,209 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 875 transitions. [2022-07-11 23:44:40,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-07-11 23:44:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 875 transitions. [2022-07-11 23:44:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:44:40,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:40,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:40,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:44:40,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash -278451968, now seen corresponding path program 1 times [2022-07-11 23:44:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:40,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815292354] [2022-07-11 23:44:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:44:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:44:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:40,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815292354] [2022-07-11 23:44:40,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815292354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:40,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:40,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:44:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836922845] [2022-07-11 23:44:40,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:40,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:44:40,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:44:40,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:40,292 INFO L87 Difference]: Start difference. First operand 613 states and 875 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:44:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:40,515 INFO L93 Difference]: Finished difference Result 674 states and 955 transitions. [2022-07-11 23:44:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-11 23:44:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:40,522 INFO L225 Difference]: With dead ends: 674 [2022-07-11 23:44:40,522 INFO L226 Difference]: Without dead ends: 669 [2022-07-11 23:44:40,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:40,529 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 188 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:40,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 996 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-11 23:44:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 648. [2022-07-11 23:44:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 564 states have (on average 1.375886524822695) internal successors, (776), 571 states have internal predecessors, (776), 60 states have call successors, (60), 22 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2022-07-11 23:44:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 921 transitions. [2022-07-11 23:44:40,561 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 921 transitions. Word has length 30 [2022-07-11 23:44:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:40,561 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 921 transitions. [2022-07-11 23:44:40,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:44:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 921 transitions. [2022-07-11 23:44:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:44:40,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:40,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:40,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:44:40,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:40,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:40,564 INFO L85 PathProgramCache]: Analyzing trace with hash 935646203, now seen corresponding path program 1 times [2022-07-11 23:44:40,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:40,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644309272] [2022-07-11 23:44:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:40,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:40,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644309272] [2022-07-11 23:44:40,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644309272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:40,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:40,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:44:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104174048] [2022-07-11 23:44:40,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:40,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:44:40,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:44:40,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:40,617 INFO L87 Difference]: Start difference. First operand 648 states and 921 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, (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) [2022-07-11 23:44:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:40,672 INFO L93 Difference]: Finished difference Result 663 states and 941 transitions. [2022-07-11 23:44:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:44:40,672 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, (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 28 [2022-07-11 23:44:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:40,676 INFO L225 Difference]: With dead ends: 663 [2022-07-11 23:44:40,676 INFO L226 Difference]: Without dead ends: 660 [2022-07-11 23:44:40,676 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:44:40,678 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 20 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:40,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 778 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-07-11 23:44:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 659. [2022-07-11 23:44:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 575 states have (on average 1.373913043478261) internal successors, (790), 581 states have internal predecessors, (790), 60 states have call successors, (60), 23 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2022-07-11 23:44:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 935 transitions. [2022-07-11 23:44:40,704 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 935 transitions. Word has length 28 [2022-07-11 23:44:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:40,705 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 935 transitions. [2022-07-11 23:44:40,705 INFO L496 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, (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) [2022-07-11 23:44:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 935 transitions. [2022-07-11 23:44:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:44:40,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:40,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:40,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:44:40,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:40,707 INFO L85 PathProgramCache]: Analyzing trace with hash -525593641, now seen corresponding path program 1 times [2022-07-11 23:44:40,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:40,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963325551] [2022-07-11 23:44:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:40,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:44:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:44:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963325551] [2022-07-11 23:44:40,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963325551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:40,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:40,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:40,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987536052] [2022-07-11 23:44:40,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:40,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:40,808 INFO L87 Difference]: Start difference. First operand 659 states and 935 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-07-11 23:44:41,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:41,095 INFO L93 Difference]: Finished difference Result 686 states and 968 transitions. [2022-07-11 23:44:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 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 30 [2022-07-11 23:44:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:41,099 INFO L225 Difference]: With dead ends: 686 [2022-07-11 23:44:41,100 INFO L226 Difference]: Without dead ends: 680 [2022-07-11 23:44:41,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:44:41,102 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 681 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:41,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 948 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-07-11 23:44:41,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 659. [2022-07-11 23:44:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 575 states have (on average 1.3721739130434782) internal successors, (789), 581 states have internal predecessors, (789), 60 states have call successors, (60), 23 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2022-07-11 23:44:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 934 transitions. [2022-07-11 23:44:41,126 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 934 transitions. Word has length 30 [2022-07-11 23:44:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:41,127 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 934 transitions. [2022-07-11 23:44:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-07-11 23:44:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 934 transitions. [2022-07-11 23:44:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 23:44:41,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:41,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:44:41,130 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1034674387, now seen corresponding path program 1 times [2022-07-11 23:44:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:41,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984631578] [2022-07-11 23:44:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:44:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:44:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:41,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:41,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984631578] [2022-07-11 23:44:41,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984631578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:41,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:41,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:41,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907620988] [2022-07-11 23:44:41,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:41,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:41,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:41,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:41,234 INFO L87 Difference]: Start difference. First operand 659 states and 934 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-07-11 23:44:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:41,544 INFO L93 Difference]: Finished difference Result 686 states and 967 transitions. [2022-07-11 23:44:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:41,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 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 32 [2022-07-11 23:44:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:41,547 INFO L225 Difference]: With dead ends: 686 [2022-07-11 23:44:41,547 INFO L226 Difference]: Without dead ends: 680 [2022-07-11 23:44:41,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:44:41,548 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 597 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:41,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1201 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-07-11 23:44:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 659. [2022-07-11 23:44:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 575 states have (on average 1.3704347826086956) internal successors, (788), 581 states have internal predecessors, (788), 60 states have call successors, (60), 23 states have call predecessors, (60), 23 states have return successors, (85), 55 states have call predecessors, (85), 53 states have call successors, (85) [2022-07-11 23:44:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 933 transitions. [2022-07-11 23:44:41,568 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 933 transitions. Word has length 32 [2022-07-11 23:44:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:41,569 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 933 transitions. [2022-07-11 23:44:41,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-07-11 23:44:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 933 transitions. [2022-07-11 23:44:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-11 23:44:41,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:41,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:41,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:44:41,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1926147241, now seen corresponding path program 1 times [2022-07-11 23:44:41,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:41,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655351496] [2022-07-11 23:44:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:44:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:44:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:41,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:41,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655351496] [2022-07-11 23:44:41,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655351496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:41,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:41,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:41,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289358905] [2022-07-11 23:44:41,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:41,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:41,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:41,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:41,632 INFO L87 Difference]: Start difference. First operand 659 states and 933 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2022-07-11 23:44:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:41,898 INFO L93 Difference]: Finished difference Result 691 states and 972 transitions. [2022-07-11 23:44:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:44:41,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 4 states have internal predecessors, (28), 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 33 [2022-07-11 23:44:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:41,902 INFO L225 Difference]: With dead ends: 691 [2022-07-11 23:44:41,902 INFO L226 Difference]: Without dead ends: 676 [2022-07-11 23:44:41,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:41,904 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 322 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:41,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1724 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-11 23:44:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 657. [2022-07-11 23:44:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 574 states have (on average 1.3693379790940767) internal successors, (786), 580 states have internal predecessors, (786), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (84), 54 states have call predecessors, (84), 52 states have call successors, (84) [2022-07-11 23:44:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 929 transitions. [2022-07-11 23:44:41,924 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 929 transitions. Word has length 33 [2022-07-11 23:44:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:41,924 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 929 transitions. [2022-07-11 23:44:41,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2022-07-11 23:44:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 929 transitions. [2022-07-11 23:44:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 23:44:41,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:41,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:41,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:44:41,926 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:41,926 INFO L85 PathProgramCache]: Analyzing trace with hash 898874144, now seen corresponding path program 1 times [2022-07-11 23:44:41,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:41,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850288599] [2022-07-11 23:44:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:41,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:44:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:44:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:41,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850288599] [2022-07-11 23:44:41,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850288599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:41,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:41,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:41,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740461993] [2022-07-11 23:44:41,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:41,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:41,985 INFO L87 Difference]: Start difference. First operand 657 states and 929 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-07-11 23:44:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:42,198 INFO L93 Difference]: Finished difference Result 689 states and 968 transitions. [2022-07-11 23:44:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:44:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 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 32 [2022-07-11 23:44:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:42,202 INFO L225 Difference]: With dead ends: 689 [2022-07-11 23:44:42,202 INFO L226 Difference]: Without dead ends: 669 [2022-07-11 23:44:42,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:42,203 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 394 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:42,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1431 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-11 23:44:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 650. [2022-07-11 23:44:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 570 states have (on average 1.3701754385964913) internal successors, (781), 576 states have internal predecessors, (781), 57 states have call successors, (57), 22 states have call predecessors, (57), 22 states have return successors, (82), 52 states have call predecessors, (82), 50 states have call successors, (82) [2022-07-11 23:44:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 920 transitions. [2022-07-11 23:44:42,222 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 920 transitions. Word has length 32 [2022-07-11 23:44:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:42,227 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 920 transitions. [2022-07-11 23:44:42,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-07-11 23:44:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 920 transitions. [2022-07-11 23:44:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:44:42,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:42,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:42,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:44:42,243 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:42,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash -608614915, now seen corresponding path program 1 times [2022-07-11 23:44:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:42,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991107859] [2022-07-11 23:44:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:42,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:42,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:42,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991107859] [2022-07-11 23:44:42,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991107859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:42,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:42,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:44:42,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590574819] [2022-07-11 23:44:42,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:42,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:44:42,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:42,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:44:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:42,267 INFO L87 Difference]: Start difference. First operand 650 states and 920 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-07-11 23:44:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:42,286 INFO L93 Difference]: Finished difference Result 691 states and 968 transitions. [2022-07-11 23:44:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:44:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 30 [2022-07-11 23:44:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:42,299 INFO L225 Difference]: With dead ends: 691 [2022-07-11 23:44:42,300 INFO L226 Difference]: Without dead ends: 625 [2022-07-11 23:44:42,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:42,301 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 84 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:42,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 880 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-07-11 23:44:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 621. [2022-07-11 23:44:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 545 states have (on average 1.3688073394495412) internal successors, (746), 552 states have internal predecessors, (746), 55 states have call successors, (55), 21 states have call predecessors, (55), 20 states have return successors, (78), 48 states have call predecessors, (78), 48 states have call successors, (78) [2022-07-11 23:44:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 879 transitions. [2022-07-11 23:44:42,317 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 879 transitions. Word has length 30 [2022-07-11 23:44:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:42,318 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 879 transitions. [2022-07-11 23:44:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-07-11 23:44:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 879 transitions. [2022-07-11 23:44:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:44:42,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:42,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:42,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:44:42,319 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:42,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -444205803, now seen corresponding path program 1 times [2022-07-11 23:44:42,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:42,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766629441] [2022-07-11 23:44:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:42,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:42,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:42,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766629441] [2022-07-11 23:44:42,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766629441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:42,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:42,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:44:42,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579902735] [2022-07-11 23:44:42,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:42,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:44:42,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:44:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:44:42,342 INFO L87 Difference]: Start difference. First operand 621 states and 879 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-11 23:44:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:42,375 INFO L93 Difference]: Finished difference Result 657 states and 920 transitions. [2022-07-11 23:44:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:44:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 30 [2022-07-11 23:44:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:42,377 INFO L225 Difference]: With dead ends: 657 [2022-07-11 23:44:42,378 INFO L226 Difference]: Without dead ends: 637 [2022-07-11 23:44:42,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:42,378 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 27 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:42,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1213 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-07-11 23:44:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 623. [2022-07-11 23:44:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 547 states have (on average 1.3674588665447898) internal successors, (748), 554 states have internal predecessors, (748), 55 states have call successors, (55), 21 states have call predecessors, (55), 20 states have return successors, (78), 48 states have call predecessors, (78), 48 states have call successors, (78) [2022-07-11 23:44:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 881 transitions. [2022-07-11 23:44:42,396 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 881 transitions. Word has length 30 [2022-07-11 23:44:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:42,396 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 881 transitions. [2022-07-11 23:44:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-11 23:44:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 881 transitions. [2022-07-11 23:44:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 23:44:42,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:42,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:42,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:44:42,398 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1157172893, now seen corresponding path program 1 times [2022-07-11 23:44:42,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:42,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991855826] [2022-07-11 23:44:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:42,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:42,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991855826] [2022-07-11 23:44:42,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991855826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:42,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:42,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:44:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594410887] [2022-07-11 23:44:42,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:42,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:44:42,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:42,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:44:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:44:42,421 INFO L87 Difference]: Start difference. First operand 623 states and 881 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-07-11 23:44:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:42,454 INFO L93 Difference]: Finished difference Result 659 states and 922 transitions. [2022-07-11 23:44:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:44:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 31 [2022-07-11 23:44:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:42,457 INFO L225 Difference]: With dead ends: 659 [2022-07-11 23:44:42,457 INFO L226 Difference]: Without dead ends: 639 [2022-07-11 23:44:42,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:42,458 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 28 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:42,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1217 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-11 23:44:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 623. [2022-07-11 23:44:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 547 states have (on average 1.3674588665447898) internal successors, (748), 554 states have internal predecessors, (748), 55 states have call successors, (55), 21 states have call predecessors, (55), 20 states have return successors, (78), 48 states have call predecessors, (78), 48 states have call successors, (78) [2022-07-11 23:44:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 881 transitions. [2022-07-11 23:44:42,476 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 881 transitions. Word has length 31 [2022-07-11 23:44:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:42,476 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 881 transitions. [2022-07-11 23:44:42,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-07-11 23:44:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 881 transitions. [2022-07-11 23:44:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-11 23:44:42,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:42,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:44:42,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1727959565, now seen corresponding path program 1 times [2022-07-11 23:44:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:42,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069050036] [2022-07-11 23:44:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:42,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:42,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069050036] [2022-07-11 23:44:42,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069050036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:42,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:42,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:44:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180814316] [2022-07-11 23:44:42,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:44:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:44:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:44:42,505 INFO L87 Difference]: Start difference. First operand 623 states and 881 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-07-11 23:44:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:42,705 INFO L93 Difference]: Finished difference Result 884 states and 1250 transitions. [2022-07-11 23:44:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:44:42,705 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), 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 34 [2022-07-11 23:44:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:42,708 INFO L225 Difference]: With dead ends: 884 [2022-07-11 23:44:42,708 INFO L226 Difference]: Without dead ends: 881 [2022-07-11 23:44:42,709 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:44:42,709 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 162 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:42,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1105 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-07-11 23:44:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 702. [2022-07-11 23:44:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 622 states have (on average 1.3762057877813505) internal successors, (856), 630 states have internal predecessors, (856), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (80), 49 states have call predecessors, (80), 50 states have call successors, (80) [2022-07-11 23:44:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 993 transitions. [2022-07-11 23:44:42,737 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 993 transitions. Word has length 34 [2022-07-11 23:44:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:42,737 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 993 transitions. [2022-07-11 23:44:42,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-07-11 23:44:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 993 transitions. [2022-07-11 23:44:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-11 23:44:42,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:42,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:42,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:44:42,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2030213193, now seen corresponding path program 1 times [2022-07-11 23:44:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:42,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241594284] [2022-07-11 23:44:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-11 23:44:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:42,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:42,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241594284] [2022-07-11 23:44:42,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241594284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:42,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:42,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:44:42,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444975535] [2022-07-11 23:44:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:42,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:44:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:42,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:44:42,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:42,776 INFO L87 Difference]: Start difference. First operand 702 states and 993 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-07-11 23:44:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:42,908 INFO L93 Difference]: Finished difference Result 733 states and 1030 transitions. [2022-07-11 23:44:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:44:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 33 [2022-07-11 23:44:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:42,911 INFO L225 Difference]: With dead ends: 733 [2022-07-11 23:44:42,911 INFO L226 Difference]: Without dead ends: 717 [2022-07-11 23:44:42,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:42,914 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 85 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:42,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1388 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-07-11 23:44:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 700. [2022-07-11 23:44:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 621 states have (on average 1.3752012882447664) internal successors, (854), 629 states have internal predecessors, (854), 56 states have call successors, (56), 23 states have call predecessors, (56), 22 states have return successors, (79), 48 states have call predecessors, (79), 49 states have call successors, (79) [2022-07-11 23:44:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 989 transitions. [2022-07-11 23:44:42,934 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 989 transitions. Word has length 33 [2022-07-11 23:44:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:42,935 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 989 transitions. [2022-07-11 23:44:42,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-07-11 23:44:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 989 transitions. [2022-07-11 23:44:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 23:44:42,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:42,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:42,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:44:42,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2029473173, now seen corresponding path program 1 times [2022-07-11 23:44:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:42,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726896397] [2022-07-11 23:44:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726896397] [2022-07-11 23:44:42,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726896397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:42,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:42,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:44:42,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831161707] [2022-07-11 23:44:42,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:44:42,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:44:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:43,000 INFO L87 Difference]: Start difference. First operand 700 states and 989 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2022-07-11 23:44:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:43,278 INFO L93 Difference]: Finished difference Result 1172 states and 1614 transitions. [2022-07-11 23:44:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:43,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 35 [2022-07-11 23:44:43,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:43,281 INFO L225 Difference]: With dead ends: 1172 [2022-07-11 23:44:43,281 INFO L226 Difference]: Without dead ends: 729 [2022-07-11 23:44:43,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:43,282 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 721 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:43,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 935 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-07-11 23:44:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 691. [2022-07-11 23:44:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 612 states have (on average 1.3611111111111112) internal successors, (833), 620 states have internal predecessors, (833), 56 states have call successors, (56), 23 states have call predecessors, (56), 22 states have return successors, (79), 48 states have call predecessors, (79), 49 states have call successors, (79) [2022-07-11 23:44:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 968 transitions. [2022-07-11 23:44:43,304 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 968 transitions. Word has length 35 [2022-07-11 23:44:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:43,304 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 968 transitions. [2022-07-11 23:44:43,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2022-07-11 23:44:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 968 transitions. [2022-07-11 23:44:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 23:44:43,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:43,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:43,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:44:43,305 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:43,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1933424636, now seen corresponding path program 1 times [2022-07-11 23:44:43,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:43,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400654384] [2022-07-11 23:44:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:43,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:43,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:44:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:43,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400654384] [2022-07-11 23:44:43,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400654384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:43,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:43,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:44:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636722959] [2022-07-11 23:44:43,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:43,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:44:43,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:44:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:43,329 INFO L87 Difference]: Start difference. First operand 691 states and 968 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:43,447 INFO L93 Difference]: Finished difference Result 722 states and 1005 transitions. [2022-07-11 23:44:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:44:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-07-11 23:44:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:43,450 INFO L225 Difference]: With dead ends: 722 [2022-07-11 23:44:43,450 INFO L226 Difference]: Without dead ends: 706 [2022-07-11 23:44:43,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:43,451 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 85 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:43,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1375 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-07-11 23:44:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 689. [2022-07-11 23:44:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 611 states have (on average 1.3600654664484453) internal successors, (831), 619 states have internal predecessors, (831), 55 states have call successors, (55), 23 states have call predecessors, (55), 22 states have return successors, (78), 47 states have call predecessors, (78), 48 states have call successors, (78) [2022-07-11 23:44:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 964 transitions. [2022-07-11 23:44:43,473 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 964 transitions. Word has length 35 [2022-07-11 23:44:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:43,473 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 964 transitions. [2022-07-11 23:44:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 964 transitions. [2022-07-11 23:44:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-11 23:44:43,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:43,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:43,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:44:43,474 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2075108197, now seen corresponding path program 1 times [2022-07-11 23:44:43,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:43,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601970759] [2022-07-11 23:44:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:43,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:43,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601970759] [2022-07-11 23:44:43,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601970759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:43,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:43,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:44:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579422636] [2022-07-11 23:44:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:43,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:44:43,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:43,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:44:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:43,501 INFO L87 Difference]: Start difference. First operand 689 states and 964 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-07-11 23:44:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:43,551 INFO L93 Difference]: Finished difference Result 1096 states and 1521 transitions. [2022-07-11 23:44:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:44:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 37 [2022-07-11 23:44:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:43,554 INFO L225 Difference]: With dead ends: 1096 [2022-07-11 23:44:43,554 INFO L226 Difference]: Without dead ends: 697 [2022-07-11 23:44:43,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:44:43,555 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 5 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:43,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 766 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-07-11 23:44:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2022-07-11 23:44:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 619 states have (on average 1.3602584814216478) internal successors, (842), 627 states have internal predecessors, (842), 55 states have call successors, (55), 23 states have call predecessors, (55), 22 states have return successors, (78), 47 states have call predecessors, (78), 48 states have call successors, (78) [2022-07-11 23:44:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 975 transitions. [2022-07-11 23:44:43,584 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 975 transitions. Word has length 37 [2022-07-11 23:44:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:43,584 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 975 transitions. [2022-07-11 23:44:43,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-07-11 23:44:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 975 transitions. [2022-07-11 23:44:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 23:44:43,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:43,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:43,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:44:43,586 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash 657684690, now seen corresponding path program 1 times [2022-07-11 23:44:43,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:43,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620305457] [2022-07-11 23:44:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:43,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 23:44:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:43,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620305457] [2022-07-11 23:44:43,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620305457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:43,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:44:43,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818049198] [2022-07-11 23:44:43,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:43,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:44:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:44:43,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:43,639 INFO L87 Difference]: Start difference. First operand 697 states and 975 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:43,828 INFO L93 Difference]: Finished difference Result 722 states and 1002 transitions. [2022-07-11 23:44:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-07-11 23:44:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:43,831 INFO L225 Difference]: With dead ends: 722 [2022-07-11 23:44:43,831 INFO L226 Difference]: Without dead ends: 704 [2022-07-11 23:44:43,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:43,831 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 96 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:43,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1693 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-07-11 23:44:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2022-07-11 23:44:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 619 states have (on average 1.3408723747980613) internal successors, (830), 627 states have internal predecessors, (830), 55 states have call successors, (55), 23 states have call predecessors, (55), 22 states have return successors, (78), 47 states have call predecessors, (78), 48 states have call successors, (78) [2022-07-11 23:44:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 963 transitions. [2022-07-11 23:44:43,855 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 963 transitions. Word has length 38 [2022-07-11 23:44:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:43,855 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 963 transitions. [2022-07-11 23:44:43,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 963 transitions. [2022-07-11 23:44:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 23:44:43,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:43,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:43,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:44:43,857 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:43,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash 101448372, now seen corresponding path program 1 times [2022-07-11 23:44:43,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:43,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806690191] [2022-07-11 23:44:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:43,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:43,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-11 23:44:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:43,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:43,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806690191] [2022-07-11 23:44:43,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806690191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:43,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:43,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480655845] [2022-07-11 23:44:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:43,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:43,919 INFO L87 Difference]: Start difference. First operand 697 states and 963 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:44,250 INFO L93 Difference]: Finished difference Result 783 states and 1067 transitions. [2022-07-11 23:44:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:44:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-07-11 23:44:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:44,253 INFO L225 Difference]: With dead ends: 783 [2022-07-11 23:44:44,253 INFO L226 Difference]: Without dead ends: 717 [2022-07-11 23:44:44,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:44:44,253 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 525 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:44,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1399 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:44:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-07-11 23:44:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 707. [2022-07-11 23:44:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 626 states have (on average 1.3354632587859425) internal successors, (836), 637 states have internal predecessors, (836), 55 states have call successors, (55), 23 states have call predecessors, (55), 25 states have return successors, (82), 47 states have call predecessors, (82), 48 states have call successors, (82) [2022-07-11 23:44:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 973 transitions. [2022-07-11 23:44:44,277 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 973 transitions. Word has length 38 [2022-07-11 23:44:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:44,278 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 973 transitions. [2022-07-11 23:44:44,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 973 transitions. [2022-07-11 23:44:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:44:44,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:44,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:44,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:44:44,279 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2119312611, now seen corresponding path program 1 times [2022-07-11 23:44:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:44,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697497647] [2022-07-11 23:44:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:44,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:44:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:44,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697497647] [2022-07-11 23:44:44,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697497647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:44,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:44,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:44,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380474361] [2022-07-11 23:44:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:44,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:44,322 INFO L87 Difference]: Start difference. First operand 707 states and 973 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2022-07-11 23:44:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:44,528 INFO L93 Difference]: Finished difference Result 727 states and 993 transitions. [2022-07-11 23:44:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:44:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 [2022-07-11 23:44:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:44,530 INFO L225 Difference]: With dead ends: 727 [2022-07-11 23:44:44,530 INFO L226 Difference]: Without dead ends: 705 [2022-07-11 23:44:44,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:44,531 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 329 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:44,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 1719 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-07-11 23:44:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 699. [2022-07-11 23:44:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 619 states have (on average 1.3344103392568658) internal successors, (826), 630 states have internal predecessors, (826), 54 states have call successors, (54), 23 states have call predecessors, (54), 25 states have return successors, (81), 46 states have call predecessors, (81), 47 states have call successors, (81) [2022-07-11 23:44:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 961 transitions. [2022-07-11 23:44:44,556 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 961 transitions. Word has length 39 [2022-07-11 23:44:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:44,556 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 961 transitions. [2022-07-11 23:44:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2022-07-11 23:44:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 961 transitions. [2022-07-11 23:44:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:44:44,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:44,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:44:44,558 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 114444064, now seen corresponding path program 1 times [2022-07-11 23:44:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:44,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812486316] [2022-07-11 23:44:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812486316] [2022-07-11 23:44:44,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812486316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:44,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:44,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119542615] [2022-07-11 23:44:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:44,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:44,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:44,592 INFO L87 Difference]: Start difference. First operand 699 states and 961 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2022-07-11 23:44:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:44,794 INFO L93 Difference]: Finished difference Result 754 states and 1025 transitions. [2022-07-11 23:44:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 [2022-07-11 23:44:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:44,814 INFO L225 Difference]: With dead ends: 754 [2022-07-11 23:44:44,814 INFO L226 Difference]: Without dead ends: 709 [2022-07-11 23:44:44,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:44:44,814 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 343 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:44,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1636 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-07-11 23:44:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 686. [2022-07-11 23:44:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 607 states have (on average 1.331136738056013) internal successors, (808), 618 states have internal predecessors, (808), 53 states have call successors, (53), 23 states have call predecessors, (53), 25 states have return successors, (80), 45 states have call predecessors, (80), 46 states have call successors, (80) [2022-07-11 23:44:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 941 transitions. [2022-07-11 23:44:44,854 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 941 transitions. Word has length 39 [2022-07-11 23:44:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:44,855 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 941 transitions. [2022-07-11 23:44:44,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2022-07-11 23:44:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 941 transitions. [2022-07-11 23:44:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:44:44,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:44,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:44,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:44:44,856 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2104766079, now seen corresponding path program 1 times [2022-07-11 23:44:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:44,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079650250] [2022-07-11 23:44:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:44,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:44,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:44,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:44,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079650250] [2022-07-11 23:44:44,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079650250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:44,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:44,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:44,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511027695] [2022-07-11 23:44:44,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:44,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:44,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:44,897 INFO L87 Difference]: Start difference. First operand 686 states and 941 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) 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) [2022-07-11 23:44:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:45,122 INFO L93 Difference]: Finished difference Result 712 states and 971 transitions. [2022-07-11 23:44:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:44:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) 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 [2022-07-11 23:44:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:45,125 INFO L225 Difference]: With dead ends: 712 [2022-07-11 23:44:45,125 INFO L226 Difference]: Without dead ends: 689 [2022-07-11 23:44:45,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:45,125 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 58 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:45,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1679 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-07-11 23:44:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 688. [2022-07-11 23:44:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 608 states have (on average 1.330592105263158) internal successors, (809), 620 states have internal predecessors, (809), 53 states have call successors, (53), 23 states have call predecessors, (53), 26 states have return successors, (81), 45 states have call predecessors, (81), 46 states have call successors, (81) [2022-07-11 23:44:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 943 transitions. [2022-07-11 23:44:45,149 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 943 transitions. Word has length 39 [2022-07-11 23:44:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:45,149 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 943 transitions. [2022-07-11 23:44:45,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) 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) [2022-07-11 23:44:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 943 transitions. [2022-07-11 23:44:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 23:44:45,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:45,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:45,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:44:45,150 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash 225426455, now seen corresponding path program 1 times [2022-07-11 23:44:45,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:45,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712453832] [2022-07-11 23:44:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:45,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:45,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:45,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:45,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712453832] [2022-07-11 23:44:45,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712453832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:45,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:45,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:44:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101757384] [2022-07-11 23:44:45,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:45,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:44:45,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:44:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:45,182 INFO L87 Difference]: Start difference. First operand 688 states and 943 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:45,386 INFO L93 Difference]: Finished difference Result 772 states and 1027 transitions. [2022-07-11 23:44:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:45,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 2 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 41 [2022-07-11 23:44:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:45,388 INFO L225 Difference]: With dead ends: 772 [2022-07-11 23:44:45,389 INFO L226 Difference]: Without dead ends: 510 [2022-07-11 23:44:45,389 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:44:45,390 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 478 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:45,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 937 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-11 23:44:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 469. [2022-07-11 23:44:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 411 states have (on average 1.29683698296837) internal successors, (533), 422 states have internal predecessors, (533), 38 states have call successors, (38), 16 states have call predecessors, (38), 19 states have return successors, (45), 31 states have call predecessors, (45), 31 states have call successors, (45) [2022-07-11 23:44:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 616 transitions. [2022-07-11 23:44:45,408 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 616 transitions. Word has length 41 [2022-07-11 23:44:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:45,408 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 616 transitions. [2022-07-11 23:44:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 616 transitions. [2022-07-11 23:44:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:44:45,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:45,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:45,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:44:45,410 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:45,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash -974540775, now seen corresponding path program 1 times [2022-07-11 23:44:45,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:45,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060413747] [2022-07-11 23:44:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:45,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:45,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-11 23:44:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:45,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:45,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060413747] [2022-07-11 23:44:45,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060413747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:45,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:45,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:44:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297996529] [2022-07-11 23:44:45,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:44:45,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:44:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:45,467 INFO L87 Difference]: Start difference. First operand 469 states and 616 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-07-11 23:44:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:45,716 INFO L93 Difference]: Finished difference Result 789 states and 1050 transitions. [2022-07-11 23:44:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 [2022-07-11 23:44:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:45,719 INFO L225 Difference]: With dead ends: 789 [2022-07-11 23:44:45,719 INFO L226 Difference]: Without dead ends: 512 [2022-07-11 23:44:45,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:44:45,720 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 451 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:45,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 1045 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-07-11 23:44:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 473. [2022-07-11 23:44:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 415 states have (on average 1.2939759036144578) internal successors, (537), 426 states have internal predecessors, (537), 38 states have call successors, (38), 16 states have call predecessors, (38), 19 states have return successors, (45), 31 states have call predecessors, (45), 31 states have call successors, (45) [2022-07-11 23:44:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 620 transitions. [2022-07-11 23:44:45,739 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 620 transitions. Word has length 40 [2022-07-11 23:44:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:45,740 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 620 transitions. [2022-07-11 23:44:45,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-07-11 23:44:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 620 transitions. [2022-07-11 23:44:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:44:45,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:45,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:45,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:44:45,741 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1588334311, now seen corresponding path program 1 times [2022-07-11 23:44:45,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:45,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78772346] [2022-07-11 23:44:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:45,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-11 23:44:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:45,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78772346] [2022-07-11 23:44:45,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78772346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:45,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:45,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:44:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652894544] [2022-07-11 23:44:45,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:45,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:44:45,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:45,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:44:45,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:44:45,772 INFO L87 Difference]: Start difference. First operand 473 states and 620 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 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) [2022-07-11 23:44:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:45,931 INFO L93 Difference]: Finished difference Result 571 states and 746 transitions. [2022-07-11 23:44:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:44:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 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 [2022-07-11 23:44:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:45,933 INFO L225 Difference]: With dead ends: 571 [2022-07-11 23:44:45,933 INFO L226 Difference]: Without dead ends: 501 [2022-07-11 23:44:45,933 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:44:45,934 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 180 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:45,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 931 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-11 23:44:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 447. [2022-07-11 23:44:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 391 states have (on average 1.3094629156010231) internal successors, (512), 403 states have internal predecessors, (512), 37 states have call successors, (37), 15 states have call predecessors, (37), 18 states have return successors, (45), 29 states have call predecessors, (45), 30 states have call successors, (45) [2022-07-11 23:44:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 594 transitions. [2022-07-11 23:44:45,953 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 594 transitions. Word has length 40 [2022-07-11 23:44:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:45,953 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 594 transitions. [2022-07-11 23:44:45,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 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) [2022-07-11 23:44:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 594 transitions. [2022-07-11 23:44:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 23:44:45,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:45,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:44:45,954 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1541633835, now seen corresponding path program 1 times [2022-07-11 23:44:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:45,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73731441] [2022-07-11 23:44:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:45,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-11 23:44:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73731441] [2022-07-11 23:44:46,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73731441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:46,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:46,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134361144] [2022-07-11 23:44:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:46,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:46,002 INFO L87 Difference]: Start difference. First operand 447 states and 594 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 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) [2022-07-11 23:44:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:46,272 INFO L93 Difference]: Finished difference Result 495 states and 660 transitions. [2022-07-11 23:44:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 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 [2022-07-11 23:44:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:46,274 INFO L225 Difference]: With dead ends: 495 [2022-07-11 23:44:46,274 INFO L226 Difference]: Without dead ends: 491 [2022-07-11 23:44:46,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:44:46,274 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 282 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:46,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1759 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-11 23:44:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 462. [2022-07-11 23:44:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 405 states have (on average 1.2987654320987654) internal successors, (526), 417 states have internal predecessors, (526), 37 states have call successors, (37), 15 states have call predecessors, (37), 19 states have return successors, (53), 30 states have call predecessors, (53), 30 states have call successors, (53) [2022-07-11 23:44:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 616 transitions. [2022-07-11 23:44:46,293 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 616 transitions. Word has length 41 [2022-07-11 23:44:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:46,293 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 616 transitions. [2022-07-11 23:44:46,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 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) [2022-07-11 23:44:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 616 transitions. [2022-07-11 23:44:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 23:44:46,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:46,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:46,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:44:46,295 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:46,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1541357005, now seen corresponding path program 1 times [2022-07-11 23:44:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:46,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967501789] [2022-07-11 23:44:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-11 23:44:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:46,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:46,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967501789] [2022-07-11 23:44:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967501789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:46,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:46,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493509151] [2022-07-11 23:44:46,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:46,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:46,334 INFO L87 Difference]: Start difference. First operand 462 states and 616 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 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) [2022-07-11 23:44:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:46,588 INFO L93 Difference]: Finished difference Result 482 states and 637 transitions. [2022-07-11 23:44:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:46,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 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 [2022-07-11 23:44:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:46,591 INFO L225 Difference]: With dead ends: 482 [2022-07-11 23:44:46,591 INFO L226 Difference]: Without dead ends: 469 [2022-07-11 23:44:46,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:46,592 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 78 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:46,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1895 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-11 23:44:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 459. [2022-07-11 23:44:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 402 states have (on average 1.300995024875622) internal successors, (523), 415 states have internal predecessors, (523), 37 states have call successors, (37), 15 states have call predecessors, (37), 19 states have return successors, (52), 29 states have call predecessors, (52), 30 states have call successors, (52) [2022-07-11 23:44:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 612 transitions. [2022-07-11 23:44:46,611 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 612 transitions. Word has length 41 [2022-07-11 23:44:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:46,611 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 612 transitions. [2022-07-11 23:44:46,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 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) [2022-07-11 23:44:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 612 transitions. [2022-07-11 23:44:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:44:46,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:46,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:46,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:44:46,613 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:46,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash -681787036, now seen corresponding path program 1 times [2022-07-11 23:44:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:46,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741140657] [2022-07-11 23:44:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-11 23:44:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:46,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741140657] [2022-07-11 23:44:46,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741140657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:46,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:46,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:44:46,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687375600] [2022-07-11 23:44:46,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:46,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:44:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:44:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:46,656 INFO L87 Difference]: Start difference. First operand 459 states and 612 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2022-07-11 23:44:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:46,971 INFO L93 Difference]: Finished difference Result 519 states and 686 transitions. [2022-07-11 23:44:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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 42 [2022-07-11 23:44:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:46,974 INFO L225 Difference]: With dead ends: 519 [2022-07-11 23:44:46,974 INFO L226 Difference]: Without dead ends: 503 [2022-07-11 23:44:46,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:44:46,974 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 596 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:46,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 1084 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-07-11 23:44:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 445. [2022-07-11 23:44:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 390 states have (on average 1.3076923076923077) internal successors, (510), 402 states have internal predecessors, (510), 36 states have call successors, (36), 15 states have call predecessors, (36), 18 states have return successors, (44), 28 states have call predecessors, (44), 29 states have call successors, (44) [2022-07-11 23:44:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 590 transitions. [2022-07-11 23:44:46,999 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 590 transitions. Word has length 42 [2022-07-11 23:44:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:47,000 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 590 transitions. [2022-07-11 23:44:47,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2022-07-11 23:44:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 590 transitions. [2022-07-11 23:44:47,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:44:47,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:47,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:47,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:44:47,001 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1773882886, now seen corresponding path program 1 times [2022-07-11 23:44:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951531580] [2022-07-11 23:44:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:47,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951531580] [2022-07-11 23:44:47,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951531580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:47,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:47,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:47,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718408170] [2022-07-11 23:44:47,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:47,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:47,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:47,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:47,065 INFO L87 Difference]: Start difference. First operand 445 states and 590 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:47,250 INFO L93 Difference]: Finished difference Result 645 states and 860 transitions. [2022-07-11 23:44:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:44:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 44 [2022-07-11 23:44:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:47,252 INFO L225 Difference]: With dead ends: 645 [2022-07-11 23:44:47,252 INFO L226 Difference]: Without dead ends: 405 [2022-07-11 23:44:47,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:47,253 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 102 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:47,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1714 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-11 23:44:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 399. [2022-07-11 23:44:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 350 states have (on average 1.2885714285714285) internal successors, (451), 358 states have internal predecessors, (451), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (39), 27 states have call predecessors, (39), 28 states have call successors, (39) [2022-07-11 23:44:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 524 transitions. [2022-07-11 23:44:47,274 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 524 transitions. Word has length 44 [2022-07-11 23:44:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:47,274 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 524 transitions. [2022-07-11 23:44:47,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 524 transitions. [2022-07-11 23:44:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 23:44:47,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:47,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:44:47,275 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash -126970977, now seen corresponding path program 1 times [2022-07-11 23:44:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:47,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556523719] [2022-07-11 23:44:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:47,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556523719] [2022-07-11 23:44:47,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556523719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:47,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:47,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:44:47,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060543014] [2022-07-11 23:44:47,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:47,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:44:47,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:44:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:47,320 INFO L87 Difference]: Start difference. First operand 399 states and 524 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:47,540 INFO L93 Difference]: Finished difference Result 599 states and 789 transitions. [2022-07-11 23:44:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 2 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 46 [2022-07-11 23:44:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:47,542 INFO L225 Difference]: With dead ends: 599 [2022-07-11 23:44:47,542 INFO L226 Difference]: Without dead ends: 405 [2022-07-11 23:44:47,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:47,544 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 390 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:47,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1008 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-11 23:44:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 399. [2022-07-11 23:44:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 350 states have (on average 1.282857142857143) internal successors, (449), 358 states have internal predecessors, (449), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (39), 27 states have call predecessors, (39), 28 states have call successors, (39) [2022-07-11 23:44:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 522 transitions. [2022-07-11 23:44:47,593 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 522 transitions. Word has length 46 [2022-07-11 23:44:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:47,594 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 522 transitions. [2022-07-11 23:44:47,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 522 transitions. [2022-07-11 23:44:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 23:44:47,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:47,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:47,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:44:47,595 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1699061038, now seen corresponding path program 1 times [2022-07-11 23:44:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:47,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738260334] [2022-07-11 23:44:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:47,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-11 23:44:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:47,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738260334] [2022-07-11 23:44:47,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738260334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:47,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:47,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471343166] [2022-07-11 23:44:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:47,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:47,644 INFO L87 Difference]: Start difference. First operand 399 states and 522 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-07-11 23:44:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:47,888 INFO L93 Difference]: Finished difference Result 417 states and 540 transitions. [2022-07-11 23:44:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 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 46 [2022-07-11 23:44:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:47,889 INFO L225 Difference]: With dead ends: 417 [2022-07-11 23:44:47,889 INFO L226 Difference]: Without dead ends: 401 [2022-07-11 23:44:47,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:47,891 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 74 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:47,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1883 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:47,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-07-11 23:44:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 395. [2022-07-11 23:44:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 347 states have (on average 1.282420749279539) internal successors, (445), 355 states have internal predecessors, (445), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (38), 26 states have call predecessors, (38), 27 states have call successors, (38) [2022-07-11 23:44:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 516 transitions. [2022-07-11 23:44:47,914 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 516 transitions. Word has length 46 [2022-07-11 23:44:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:47,914 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 516 transitions. [2022-07-11 23:44:47,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-07-11 23:44:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 516 transitions. [2022-07-11 23:44:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:44:47,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:47,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:47,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:44:47,915 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1875666142, now seen corresponding path program 1 times [2022-07-11 23:44:47,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:47,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400958372] [2022-07-11 23:44:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:47,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 23:44:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:47,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400958372] [2022-07-11 23:44:47,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400958372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:47,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:47,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:47,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256273568] [2022-07-11 23:44:47,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:47,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:47,967 INFO L87 Difference]: Start difference. First operand 395 states and 516 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-07-11 23:44:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:48,282 INFO L93 Difference]: Finished difference Result 418 states and 540 transitions. [2022-07-11 23:44:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 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 48 [2022-07-11 23:44:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:48,283 INFO L225 Difference]: With dead ends: 418 [2022-07-11 23:44:48,284 INFO L226 Difference]: Without dead ends: 396 [2022-07-11 23:44:48,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:48,284 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 148 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:48,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1379 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:44:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-11 23:44:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 390. [2022-07-11 23:44:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 344 states have (on average 1.2819767441860466) internal successors, (441), 351 states have internal predecessors, (441), 32 states have call successors, (32), 13 states have call predecessors, (32), 13 states have return successors, (37), 26 states have call predecessors, (37), 26 states have call successors, (37) [2022-07-11 23:44:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2022-07-11 23:44:48,303 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 48 [2022-07-11 23:44:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:48,304 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2022-07-11 23:44:48,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-07-11 23:44:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2022-07-11 23:44:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:44:48,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:48,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:48,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:44:48,305 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 712165053, now seen corresponding path program 1 times [2022-07-11 23:44:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:48,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115071446] [2022-07-11 23:44:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:48,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:48,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:48,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115071446] [2022-07-11 23:44:48,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115071446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:48,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:48,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:44:48,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149063252] [2022-07-11 23:44:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:48,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:44:48,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:44:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:44:48,341 INFO L87 Difference]: Start difference. First operand 390 states and 510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 3 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) [2022-07-11 23:44:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:48,487 INFO L93 Difference]: Finished difference Result 663 states and 861 transitions. [2022-07-11 23:44:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:44:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 3 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 49 [2022-07-11 23:44:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:48,489 INFO L225 Difference]: With dead ends: 663 [2022-07-11 23:44:48,489 INFO L226 Difference]: Without dead ends: 475 [2022-07-11 23:44:48,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:48,490 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 189 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:48,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 849 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-11 23:44:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 443. [2022-07-11 23:44:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 392 states have (on average 1.280612244897959) internal successors, (502), 398 states have internal predecessors, (502), 34 states have call successors, (34), 15 states have call predecessors, (34), 16 states have return successors, (43), 30 states have call predecessors, (43), 29 states have call successors, (43) [2022-07-11 23:44:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 579 transitions. [2022-07-11 23:44:48,509 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 579 transitions. Word has length 49 [2022-07-11 23:44:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:48,510 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 579 transitions. [2022-07-11 23:44:48,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 3 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) [2022-07-11 23:44:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 579 transitions. [2022-07-11 23:44:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:44:48,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:48,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:44:48,511 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:48,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1620758026, now seen corresponding path program 1 times [2022-07-11 23:44:48,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:48,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414248774] [2022-07-11 23:44:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:48,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:48,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414248774] [2022-07-11 23:44:48,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414248774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:48,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:48,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:44:48,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517401958] [2022-07-11 23:44:48,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:48,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:44:48,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:44:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:44:48,541 INFO L87 Difference]: Start difference. First operand 443 states and 579 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-07-11 23:44:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:48,691 INFO L93 Difference]: Finished difference Result 528 states and 679 transitions. [2022-07-11 23:44:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:44:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 48 [2022-07-11 23:44:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:48,693 INFO L225 Difference]: With dead ends: 528 [2022-07-11 23:44:48,693 INFO L226 Difference]: Without dead ends: 456 [2022-07-11 23:44:48,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:48,694 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 70 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:48,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1058 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-11 23:44:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 445. [2022-07-11 23:44:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 394 states have (on average 1.2791878172588833) internal successors, (504), 400 states have internal predecessors, (504), 34 states have call successors, (34), 15 states have call predecessors, (34), 16 states have return successors, (43), 30 states have call predecessors, (43), 29 states have call successors, (43) [2022-07-11 23:44:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 581 transitions. [2022-07-11 23:44:48,714 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 581 transitions. Word has length 48 [2022-07-11 23:44:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:48,714 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 581 transitions. [2022-07-11 23:44:48,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-07-11 23:44:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 581 transitions. [2022-07-11 23:44:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:44:48,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:48,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:48,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:44:48,715 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:48,715 INFO L85 PathProgramCache]: Analyzing trace with hash -979201482, now seen corresponding path program 1 times [2022-07-11 23:44:48,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:48,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882227451] [2022-07-11 23:44:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:48,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:48,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:48,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882227451] [2022-07-11 23:44:48,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882227451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:48,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:48,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598649418] [2022-07-11 23:44:48,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:48,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:48,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:48,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:48,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:48,757 INFO L87 Difference]: Start difference. First operand 445 states and 581 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 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) [2022-07-11 23:44:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:48,974 INFO L93 Difference]: Finished difference Result 455 states and 590 transitions. [2022-07-11 23:44:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 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 48 [2022-07-11 23:44:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:48,982 INFO L225 Difference]: With dead ends: 455 [2022-07-11 23:44:48,982 INFO L226 Difference]: Without dead ends: 419 [2022-07-11 23:44:48,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:48,983 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 55 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:48,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1786 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-11 23:44:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2022-07-11 23:44:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 369 states have (on average 1.2628726287262872) internal successors, (466), 373 states have internal predecessors, (466), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (41), 29 states have call predecessors, (41), 28 states have call successors, (41) [2022-07-11 23:44:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 539 transitions. [2022-07-11 23:44:49,003 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 539 transitions. Word has length 48 [2022-07-11 23:44:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:49,003 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 539 transitions. [2022-07-11 23:44:49,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 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) [2022-07-11 23:44:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 539 transitions. [2022-07-11 23:44:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 23:44:49,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:49,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:49,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:44:49,004 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:49,004 INFO L85 PathProgramCache]: Analyzing trace with hash -697229217, now seen corresponding path program 1 times [2022-07-11 23:44:49,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:49,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500026103] [2022-07-11 23:44:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:49,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 23:44:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:49,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500026103] [2022-07-11 23:44:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500026103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:49,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:49,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483601089] [2022-07-11 23:44:49,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:49,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:49,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:49,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:49,052 INFO L87 Difference]: Start difference. First operand 417 states and 539 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:49,257 INFO L93 Difference]: Finished difference Result 667 states and 865 transitions. [2022-07-11 23:44:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 2 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 51 [2022-07-11 23:44:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:49,259 INFO L225 Difference]: With dead ends: 667 [2022-07-11 23:44:49,259 INFO L226 Difference]: Without dead ends: 446 [2022-07-11 23:44:49,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:49,260 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 81 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:49,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1620 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:49,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-11 23:44:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 417. [2022-07-11 23:44:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 369 states have (on average 1.2574525745257452) internal successors, (464), 373 states have internal predecessors, (464), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (41), 29 states have call predecessors, (41), 28 states have call successors, (41) [2022-07-11 23:44:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 537 transitions. [2022-07-11 23:44:49,282 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 537 transitions. Word has length 51 [2022-07-11 23:44:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:49,282 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 537 transitions. [2022-07-11 23:44:49,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 537 transitions. [2022-07-11 23:44:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 23:44:49,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:49,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:49,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:44:49,283 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1011871155, now seen corresponding path program 1 times [2022-07-11 23:44:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:49,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616641649] [2022-07-11 23:44:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:49,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-11 23:44:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:49,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616641649] [2022-07-11 23:44:49,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616641649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:49,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:49,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427306555] [2022-07-11 23:44:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:49,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:49,334 INFO L87 Difference]: Start difference. First operand 417 states and 537 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-07-11 23:44:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:49,602 INFO L93 Difference]: Finished difference Result 438 states and 559 transitions. [2022-07-11 23:44:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:44:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 7 states have internal predecessors, (48), 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 51 [2022-07-11 23:44:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:49,603 INFO L225 Difference]: With dead ends: 438 [2022-07-11 23:44:49,603 INFO L226 Difference]: Without dead ends: 419 [2022-07-11 23:44:49,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:44:49,604 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 82 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:49,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1833 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-11 23:44:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 413. [2022-07-11 23:44:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 366 states have (on average 1.2568306010928962) internal successors, (460), 370 states have internal predecessors, (460), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (40), 28 states have call predecessors, (40), 27 states have call successors, (40) [2022-07-11 23:44:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 531 transitions. [2022-07-11 23:44:49,634 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 531 transitions. Word has length 51 [2022-07-11 23:44:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:49,634 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 531 transitions. [2022-07-11 23:44:49,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-07-11 23:44:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 531 transitions. [2022-07-11 23:44:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:44:49,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:49,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:49,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:44:49,636 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1800703409, now seen corresponding path program 1 times [2022-07-11 23:44:49,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:49,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037935076] [2022-07-11 23:44:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:49,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 23:44:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:49,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:49,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037935076] [2022-07-11 23:44:49,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037935076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:49,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:49,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:49,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394678431] [2022-07-11 23:44:49,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:49,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:49,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:49,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:49,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:49,677 INFO L87 Difference]: Start difference. First operand 413 states and 531 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-07-11 23:44:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:49,925 INFO L93 Difference]: Finished difference Result 434 states and 553 transitions. [2022-07-11 23:44:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:44:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 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 52 [2022-07-11 23:44:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:49,927 INFO L225 Difference]: With dead ends: 434 [2022-07-11 23:44:49,927 INFO L226 Difference]: Without dead ends: 414 [2022-07-11 23:44:49,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:44:49,928 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 82 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:49,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1795 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-11 23:44:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 408. [2022-07-11 23:44:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 362 states have (on average 1.2569060773480663) internal successors, (455), 366 states have internal predecessors, (455), 30 states have call successors, (30), 15 states have call predecessors, (30), 15 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2022-07-11 23:44:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 524 transitions. [2022-07-11 23:44:49,946 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 524 transitions. Word has length 52 [2022-07-11 23:44:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:49,947 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 524 transitions. [2022-07-11 23:44:49,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-07-11 23:44:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 524 transitions. [2022-07-11 23:44:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:44:49,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:49,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:49,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-11 23:44:49,948 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1557824811, now seen corresponding path program 1 times [2022-07-11 23:44:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:49,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904110636] [2022-07-11 23:44:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 23:44:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:49,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:49,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904110636] [2022-07-11 23:44:49,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904110636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:49,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:49,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972179514] [2022-07-11 23:44:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:49,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:49,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:49,987 INFO L87 Difference]: Start difference. First operand 408 states and 524 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-07-11 23:44:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:50,231 INFO L93 Difference]: Finished difference Result 429 states and 546 transitions. [2022-07-11 23:44:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:44:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 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 52 [2022-07-11 23:44:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:50,232 INFO L225 Difference]: With dead ends: 429 [2022-07-11 23:44:50,232 INFO L226 Difference]: Without dead ends: 410 [2022-07-11 23:44:50,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:44:50,233 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 82 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:50,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1749 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:50,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-11 23:44:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 404. [2022-07-11 23:44:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 359 states have (on average 1.256267409470752) internal successors, (451), 363 states have internal predecessors, (451), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (38), 26 states have call predecessors, (38), 25 states have call successors, (38) [2022-07-11 23:44:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 518 transitions. [2022-07-11 23:44:50,251 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 518 transitions. Word has length 52 [2022-07-11 23:44:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:50,252 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 518 transitions. [2022-07-11 23:44:50,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 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) [2022-07-11 23:44:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 518 transitions. [2022-07-11 23:44:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:44:50,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:50,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:50,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:44:50,253 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1863063646, now seen corresponding path program 1 times [2022-07-11 23:44:50,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:50,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455562895] [2022-07-11 23:44:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:50,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:44:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:50,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:50,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455562895] [2022-07-11 23:44:50,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455562895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:50,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:50,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734580407] [2022-07-11 23:44:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:50,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:50,305 INFO L87 Difference]: Start difference. First operand 404 states and 518 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 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) [2022-07-11 23:44:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:50,545 INFO L93 Difference]: Finished difference Result 421 states and 535 transitions. [2022-07-11 23:44:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:50,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 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 52 [2022-07-11 23:44:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:50,547 INFO L225 Difference]: With dead ends: 421 [2022-07-11 23:44:50,547 INFO L226 Difference]: Without dead ends: 388 [2022-07-11 23:44:50,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:50,547 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 72 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:50,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1593 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-11 23:44:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 382. [2022-07-11 23:44:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 338 states have (on average 1.2603550295857988) internal successors, (426), 342 states have internal predecessors, (426), 28 states have call successors, (28), 15 states have call predecessors, (28), 15 states have return successors, (37), 25 states have call predecessors, (37), 24 states have call successors, (37) [2022-07-11 23:44:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 491 transitions. [2022-07-11 23:44:50,565 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 491 transitions. Word has length 52 [2022-07-11 23:44:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:50,565 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 491 transitions. [2022-07-11 23:44:50,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 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) [2022-07-11 23:44:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 491 transitions. [2022-07-11 23:44:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-11 23:44:50,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:50,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:50,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:44:50,567 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1043047530, now seen corresponding path program 1 times [2022-07-11 23:44:50,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:50,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695755377] [2022-07-11 23:44:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:50,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:50,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:50,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695755377] [2022-07-11 23:44:50,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695755377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:50,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:50,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:50,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317111166] [2022-07-11 23:44:50,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:50,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:50,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:50,628 INFO L87 Difference]: Start difference. First operand 382 states and 491 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:50,854 INFO L93 Difference]: Finished difference Result 724 states and 945 transitions. [2022-07-11 23:44:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 2 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 54 [2022-07-11 23:44:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:50,856 INFO L225 Difference]: With dead ends: 724 [2022-07-11 23:44:50,856 INFO L226 Difference]: Without dead ends: 514 [2022-07-11 23:44:50,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:50,859 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 133 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:50,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1639 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-07-11 23:44:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 382. [2022-07-11 23:44:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 338 states have (on average 1.257396449704142) internal successors, (425), 342 states have internal predecessors, (425), 28 states have call successors, (28), 15 states have call predecessors, (28), 15 states have return successors, (37), 25 states have call predecessors, (37), 24 states have call successors, (37) [2022-07-11 23:44:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 490 transitions. [2022-07-11 23:44:50,880 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 490 transitions. Word has length 54 [2022-07-11 23:44:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:50,880 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 490 transitions. [2022-07-11 23:44:50,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 23:44:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 490 transitions. [2022-07-11 23:44:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 23:44:50,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:50,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-11 23:44:50,883 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash 843934500, now seen corresponding path program 1 times [2022-07-11 23:44:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106892370] [2022-07-11 23:44:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:50,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:44:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:50,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:50,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106892370] [2022-07-11 23:44:50,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106892370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:50,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:50,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:50,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022946010] [2022-07-11 23:44:50,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:50,930 INFO L87 Difference]: Start difference. First operand 382 states and 490 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 7 states have internal predecessors, (53), 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) [2022-07-11 23:44:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:51,192 INFO L93 Difference]: Finished difference Result 403 states and 512 transitions. [2022-07-11 23:44:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:44:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 7 states have internal predecessors, (53), 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 56 [2022-07-11 23:44:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:51,194 INFO L225 Difference]: With dead ends: 403 [2022-07-11 23:44:51,194 INFO L226 Difference]: Without dead ends: 366 [2022-07-11 23:44:51,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:44:51,200 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 90 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:51,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1547 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-07-11 23:44:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 360. [2022-07-11 23:44:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 319 states have (on average 1.2570532915360502) internal successors, (401), 323 states have internal predecessors, (401), 26 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2022-07-11 23:44:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 462 transitions. [2022-07-11 23:44:51,219 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 462 transitions. Word has length 56 [2022-07-11 23:44:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:51,220 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 462 transitions. [2022-07-11 23:44:51,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 7 states have internal predecessors, (53), 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) [2022-07-11 23:44:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 462 transitions. [2022-07-11 23:44:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:44:51,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:51,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-11 23:44:51,221 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1757413827, now seen corresponding path program 1 times [2022-07-11 23:44:51,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:51,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055503125] [2022-07-11 23:44:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:51,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 23:44:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:51,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:51,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055503125] [2022-07-11 23:44:51,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055503125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:51,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:51,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:51,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336767182] [2022-07-11 23:44:51,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:51,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:51,274 INFO L87 Difference]: Start difference. First operand 360 states and 462 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:44:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:51,449 INFO L93 Difference]: Finished difference Result 572 states and 729 transitions. [2022-07-11 23:44:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-07-11 23:44:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:51,450 INFO L225 Difference]: With dead ends: 572 [2022-07-11 23:44:51,451 INFO L226 Difference]: Without dead ends: 341 [2022-07-11 23:44:51,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:51,452 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 190 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:51,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1048 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-11 23:44:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2022-07-11 23:44:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 291 states have (on average 1.2577319587628866) internal successors, (366), 294 states have internal predecessors, (366), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (23), 20 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-11 23:44:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 412 transitions. [2022-07-11 23:44:51,469 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 412 transitions. Word has length 62 [2022-07-11 23:44:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:51,470 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 412 transitions. [2022-07-11 23:44:51,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:44:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 412 transitions. [2022-07-11 23:44:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-11 23:44:51,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:51,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:51,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-11 23:44:51,471 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash 282061023, now seen corresponding path program 1 times [2022-07-11 23:44:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:51,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109425278] [2022-07-11 23:44:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:51,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 23:44:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:51,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:51,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109425278] [2022-07-11 23:44:51,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109425278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:51,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:51,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:44:51,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719012474] [2022-07-11 23:44:51,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:51,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:44:51,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:44:51,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:51,537 INFO L87 Difference]: Start difference. First operand 327 states and 412 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 7 states have internal predecessors, (61), 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) [2022-07-11 23:44:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:51,811 INFO L93 Difference]: Finished difference Result 374 states and 469 transitions. [2022-07-11 23:44:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:44:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 7 states have internal predecessors, (61), 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 66 [2022-07-11 23:44:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:51,813 INFO L225 Difference]: With dead ends: 374 [2022-07-11 23:44:51,813 INFO L226 Difference]: Without dead ends: 355 [2022-07-11 23:44:51,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:44:51,813 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 352 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:51,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 1314 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-11 23:44:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 335. [2022-07-11 23:44:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 298 states have (on average 1.2516778523489933) internal successors, (373), 301 states have internal predecessors, (373), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (26), 21 states have call predecessors, (26), 20 states have call successors, (26) [2022-07-11 23:44:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 422 transitions. [2022-07-11 23:44:51,841 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 422 transitions. Word has length 66 [2022-07-11 23:44:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:51,841 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 422 transitions. [2022-07-11 23:44:51,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 7 states have internal predecessors, (61), 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) [2022-07-11 23:44:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 422 transitions. [2022-07-11 23:44:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 23:44:51,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:51,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:51,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-11 23:44:51,842 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1597986012, now seen corresponding path program 1 times [2022-07-11 23:44:51,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:51,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864784061] [2022-07-11 23:44:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:51,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 23:44:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 23:44:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:51,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864784061] [2022-07-11 23:44:51,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864784061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:51,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:51,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:44:51,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196112614] [2022-07-11 23:44:51,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:44:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:44:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:51,885 INFO L87 Difference]: Start difference. First operand 335 states and 422 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:52,200 INFO L93 Difference]: Finished difference Result 698 states and 856 transitions. [2022-07-11 23:44:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:52,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 4 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 68 [2022-07-11 23:44:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:52,202 INFO L225 Difference]: With dead ends: 698 [2022-07-11 23:44:52,202 INFO L226 Difference]: Without dead ends: 454 [2022-07-11 23:44:52,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:44:52,203 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 539 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:52,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1052 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-11 23:44:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 429. [2022-07-11 23:44:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 382 states have (on average 1.2408376963350785) internal successors, (474), 387 states have internal predecessors, (474), 25 states have call successors, (25), 19 states have call predecessors, (25), 21 states have return successors, (28), 23 states have call predecessors, (28), 22 states have call successors, (28) [2022-07-11 23:44:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 527 transitions. [2022-07-11 23:44:52,224 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 527 transitions. Word has length 68 [2022-07-11 23:44:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:52,224 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 527 transitions. [2022-07-11 23:44:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 527 transitions. [2022-07-11 23:44:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:44:52,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:52,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-11 23:44:52,226 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2100257904, now seen corresponding path program 1 times [2022-07-11 23:44:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302208852] [2022-07-11 23:44:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:52,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 23:44:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:52,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-11 23:44:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:52,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:52,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302208852] [2022-07-11 23:44:52,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302208852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:52,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:52,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:44:52,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340299179] [2022-07-11 23:44:52,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:52,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:44:52,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:52,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:44:52,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:52,289 INFO L87 Difference]: Start difference. First operand 429 states and 527 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 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) [2022-07-11 23:44:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:52,543 INFO L93 Difference]: Finished difference Result 462 states and 562 transitions. [2022-07-11 23:44:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:44:52,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 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 67 [2022-07-11 23:44:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:52,548 INFO L225 Difference]: With dead ends: 462 [2022-07-11 23:44:52,552 INFO L226 Difference]: Without dead ends: 443 [2022-07-11 23:44:52,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:44:52,553 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 152 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:52,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1563 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-11 23:44:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 421. [2022-07-11 23:44:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 375 states have (on average 1.2426666666666666) internal successors, (466), 380 states have internal predecessors, (466), 25 states have call successors, (25), 19 states have call predecessors, (25), 20 states have return successors, (26), 22 states have call predecessors, (26), 22 states have call successors, (26) [2022-07-11 23:44:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 517 transitions. [2022-07-11 23:44:52,587 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 517 transitions. Word has length 67 [2022-07-11 23:44:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:52,587 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 517 transitions. [2022-07-11 23:44:52,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 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) [2022-07-11 23:44:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 517 transitions. [2022-07-11 23:44:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:44:52,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:52,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:52,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-11 23:44:52,589 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1162614473, now seen corresponding path program 1 times [2022-07-11 23:44:52,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733597573] [2022-07-11 23:44:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:52,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:52,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:44:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:52,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 23:44:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-11 23:44:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:52,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:52,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733597573] [2022-07-11 23:44:52,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733597573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:52,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:52,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-11 23:44:52,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404074812] [2022-07-11 23:44:52,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:52,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:44:52,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:44:52,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:44:52,646 INFO L87 Difference]: Start difference. First operand 421 states and 517 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:44:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:53,036 INFO L93 Difference]: Finished difference Result 423 states and 518 transitions. [2022-07-11 23:44:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:44:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2022-07-11 23:44:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:53,038 INFO L225 Difference]: With dead ends: 423 [2022-07-11 23:44:53,038 INFO L226 Difference]: Without dead ends: 346 [2022-07-11 23:44:53,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:44:53,038 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 193 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:53,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1384 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:44:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-07-11 23:44:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-07-11 23:44:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 307 states have (on average 1.247557003257329) internal successors, (383), 311 states have internal predecessors, (383), 21 states have call successors, (21), 16 states have call predecessors, (21), 17 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2022-07-11 23:44:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 427 transitions. [2022-07-11 23:44:53,056 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 427 transitions. Word has length 69 [2022-07-11 23:44:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:53,056 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 427 transitions. [2022-07-11 23:44:53,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:44:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 427 transitions. [2022-07-11 23:44:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 23:44:53,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:53,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-11 23:44:53,057 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2112644440, now seen corresponding path program 1 times [2022-07-11 23:44:53,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:53,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877824733] [2022-07-11 23:44:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:53,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-11 23:44:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877824733] [2022-07-11 23:44:53,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877824733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:53,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:53,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:53,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790578793] [2022-07-11 23:44:53,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:53,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:53,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:53,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:53,105 INFO L87 Difference]: Start difference. First operand 346 states and 427 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 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) [2022-07-11 23:44:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:53,242 INFO L93 Difference]: Finished difference Result 504 states and 620 transitions. [2022-07-11 23:44:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:44:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 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 71 [2022-07-11 23:44:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:53,244 INFO L225 Difference]: With dead ends: 504 [2022-07-11 23:44:53,244 INFO L226 Difference]: Without dead ends: 373 [2022-07-11 23:44:53,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:44:53,244 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 106 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:53,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1087 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-11 23:44:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 357. [2022-07-11 23:44:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 317 states have (on average 1.22397476340694) internal successors, (388), 322 states have internal predecessors, (388), 22 states have call successors, (22), 16 states have call predecessors, (22), 17 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2022-07-11 23:44:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 433 transitions. [2022-07-11 23:44:53,276 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 433 transitions. Word has length 71 [2022-07-11 23:44:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:53,276 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 433 transitions. [2022-07-11 23:44:53,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 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) [2022-07-11 23:44:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 433 transitions. [2022-07-11 23:44:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-11 23:44:53,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:53,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-11 23:44:53,278 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1723775457, now seen corresponding path program 1 times [2022-07-11 23:44:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750811584] [2022-07-11 23:44:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:44:53,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:53,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750811584] [2022-07-11 23:44:53,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750811584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:53,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:53,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:44:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631618642] [2022-07-11 23:44:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:53,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:44:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:53,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:44:53,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:53,326 INFO L87 Difference]: Start difference. First operand 357 states and 433 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:44:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:53,435 INFO L93 Difference]: Finished difference Result 456 states and 556 transitions. [2022-07-11 23:44:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:44:53,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 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 74 [2022-07-11 23:44:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:53,436 INFO L225 Difference]: With dead ends: 456 [2022-07-11 23:44:53,436 INFO L226 Difference]: Without dead ends: 392 [2022-07-11 23:44:53,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:53,437 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 77 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:53,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1208 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-11 23:44:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 265. [2022-07-11 23:44:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 234 states have (on average 1.1794871794871795) internal successors, (276), 238 states have internal predecessors, (276), 16 states have call successors, (16), 12 states have call predecessors, (16), 14 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2022-07-11 23:44:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 311 transitions. [2022-07-11 23:44:53,452 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 311 transitions. Word has length 74 [2022-07-11 23:44:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:53,452 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 311 transitions. [2022-07-11 23:44:53,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:44:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 311 transitions. [2022-07-11 23:44:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-11 23:44:53,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:53,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:53,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-11 23:44:53,453 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1573659208, now seen corresponding path program 1 times [2022-07-11 23:44:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020469169] [2022-07-11 23:44:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 23:44:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-11 23:44:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:53,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020469169] [2022-07-11 23:44:53,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020469169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:53,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:53,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:53,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745010432] [2022-07-11 23:44:53,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:53,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:53,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:53,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:53,503 INFO L87 Difference]: Start difference. First operand 265 states and 311 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:53,769 INFO L93 Difference]: Finished difference Result 497 states and 582 transitions. [2022-07-11 23:44:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:44:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-07-11 23:44:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:53,770 INFO L225 Difference]: With dead ends: 497 [2022-07-11 23:44:53,771 INFO L226 Difference]: Without dead ends: 444 [2022-07-11 23:44:53,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:44:53,771 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 370 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:53,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1259 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-11 23:44:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 191. [2022-07-11 23:44:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 171 states have (on average 1.1578947368421053) internal successors, (198), 173 states have internal predecessors, (198), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-11 23:44:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 217 transitions. [2022-07-11 23:44:53,784 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 217 transitions. Word has length 77 [2022-07-11 23:44:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:53,785 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 217 transitions. [2022-07-11 23:44:53,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 217 transitions. [2022-07-11 23:44:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 23:44:53,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:53,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:53,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-11 23:44:53,785 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1441970232, now seen corresponding path program 1 times [2022-07-11 23:44:53,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:53,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2213789] [2022-07-11 23:44:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:53,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-11 23:44:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:44:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:53,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2213789] [2022-07-11 23:44:53,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2213789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:53,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:53,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:44:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994620283] [2022-07-11 23:44:53,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:53,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:44:53,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:44:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:53,821 INFO L87 Difference]: Start difference. First operand 191 states and 217 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-11 23:44:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:53,888 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2022-07-11 23:44:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:53,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 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 83 [2022-07-11 23:44:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:53,889 INFO L225 Difference]: With dead ends: 256 [2022-07-11 23:44:53,889 INFO L226 Difference]: Without dead ends: 197 [2022-07-11 23:44:53,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:53,890 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 45 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:53,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 507 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-11 23:44:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2022-07-11 23:44:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 171 states have (on average 1.152046783625731) internal successors, (197), 173 states have internal predecessors, (197), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-11 23:44:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-07-11 23:44:53,902 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 83 [2022-07-11 23:44:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:53,902 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-07-11 23:44:53,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-11 23:44:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-07-11 23:44:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-11 23:44:53,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:53,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:53,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-11 23:44:53,903 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1573344441, now seen corresponding path program 1 times [2022-07-11 23:44:53,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:53,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558782605] [2022-07-11 23:44:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:53,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-11 23:44:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:44:53,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:53,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558782605] [2022-07-11 23:44:53,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558782605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:53,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:53,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:44:53,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608887270] [2022-07-11 23:44:53,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:53,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:44:53,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:44:53,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:53,947 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:54,023 INFO L93 Difference]: Finished difference Result 247 states and 277 transitions. [2022-07-11 23:44:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-07-11 23:44:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:54,024 INFO L225 Difference]: With dead ends: 247 [2022-07-11 23:44:54,024 INFO L226 Difference]: Without dead ends: 221 [2022-07-11 23:44:54,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:44:54,025 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 67 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:54,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 572 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-11 23:44:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2022-07-11 23:44:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 173 states have (on average 1.1502890173410405) internal successors, (199), 175 states have internal predecessors, (199), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-11 23:44:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2022-07-11 23:44:54,038 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 103 [2022-07-11 23:44:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:54,038 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2022-07-11 23:44:54,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2022-07-11 23:44:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-11 23:44:54,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:54,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:54,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-11 23:44:54,039 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash -696614137, now seen corresponding path program 1 times [2022-07-11 23:44:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:54,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987517783] [2022-07-11 23:44:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-11 23:44:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:44:54,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987517783] [2022-07-11 23:44:54,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987517783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:54,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:54,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:44:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066190113] [2022-07-11 23:44:54,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:54,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:44:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:44:54,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:44:54,110 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:54,281 INFO L93 Difference]: Finished difference Result 233 states and 264 transitions. [2022-07-11 23:44:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:44:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-07-11 23:44:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:54,283 INFO L225 Difference]: With dead ends: 233 [2022-07-11 23:44:54,283 INFO L226 Difference]: Without dead ends: 197 [2022-07-11 23:44:54,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:44:54,283 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 303 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:54,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 831 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-11 23:44:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2022-07-11 23:44:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 173 states have internal predecessors, (195), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-11 23:44:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2022-07-11 23:44:54,302 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 103 [2022-07-11 23:44:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:54,302 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2022-07-11 23:44:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 8 states have internal predecessors, (81), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2022-07-11 23:44:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-11 23:44:54,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:54,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-11 23:44:54,303 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash 561522837, now seen corresponding path program 1 times [2022-07-11 23:44:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:54,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518831053] [2022-07-11 23:44:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-11 23:44:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:44:54,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518831053] [2022-07-11 23:44:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518831053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:54,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:54,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-11 23:44:54,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764564835] [2022-07-11 23:44:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:44:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:44:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:44:54,422 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 11 states have internal predecessors, (88), 3 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) [2022-07-11 23:44:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:54,718 INFO L93 Difference]: Finished difference Result 299 states and 343 transitions. [2022-07-11 23:44:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:44:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 11 states have internal predecessors, (88), 3 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 104 [2022-07-11 23:44:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:54,719 INFO L225 Difference]: With dead ends: 299 [2022-07-11 23:44:54,719 INFO L226 Difference]: Without dead ends: 265 [2022-07-11 23:44:54,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:44:54,720 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 487 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:54,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 1347 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-11 23:44:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 206. [2022-07-11 23:44:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 185 states have (on average 1.145945945945946) internal successors, (212), 187 states have internal predecessors, (212), 9 states have call successors, (9), 9 states have call predecessors, (9), 11 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-11 23:44:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 232 transitions. [2022-07-11 23:44:54,734 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 232 transitions. Word has length 104 [2022-07-11 23:44:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:54,734 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 232 transitions. [2022-07-11 23:44:54,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 11 states have internal predecessors, (88), 3 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) [2022-07-11 23:44:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 232 transitions. [2022-07-11 23:44:54,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:44:54,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:54,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:54,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-11 23:44:54,735 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1183080786, now seen corresponding path program 1 times [2022-07-11 23:44:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:54,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864190545] [2022-07-11 23:44:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-11 23:44:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:44:54,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864190545] [2022-07-11 23:44:54,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864190545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:54,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:54,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-11 23:44:54,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140619617] [2022-07-11 23:44:54,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:54,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:44:54,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:54,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:44:54,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:44:54,859 INFO L87 Difference]: Start difference. First operand 206 states and 232 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 11 states have internal predecessors, (90), 3 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) [2022-07-11 23:44:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:55,052 INFO L93 Difference]: Finished difference Result 280 states and 318 transitions. [2022-07-11 23:44:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:44:55,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 11 states have internal predecessors, (90), 3 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 105 [2022-07-11 23:44:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:55,053 INFO L225 Difference]: With dead ends: 280 [2022-07-11 23:44:55,053 INFO L226 Difference]: Without dead ends: 220 [2022-07-11 23:44:55,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:44:55,054 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 30 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:55,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1674 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:44:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-11 23:44:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 206. [2022-07-11 23:44:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 185 states have (on average 1.1405405405405404) internal successors, (211), 187 states have internal predecessors, (211), 9 states have call successors, (9), 9 states have call predecessors, (9), 11 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-11 23:44:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 231 transitions. [2022-07-11 23:44:55,067 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 231 transitions. Word has length 105 [2022-07-11 23:44:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:55,067 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 231 transitions. [2022-07-11 23:44:55,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 11 states have internal predecessors, (90), 3 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) [2022-07-11 23:44:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 231 transitions. [2022-07-11 23:44:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-11 23:44:55,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:55,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-11 23:44:55,068 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1392028993, now seen corresponding path program 1 times [2022-07-11 23:44:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:55,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907268352] [2022-07-11 23:44:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-11 23:44:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:44:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:55,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907268352] [2022-07-11 23:44:55,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907268352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:55,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:55,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:44:55,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781637695] [2022-07-11 23:44:55,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:44:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:44:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:44:55,117 INFO L87 Difference]: Start difference. First operand 206 states and 231 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:55,187 INFO L93 Difference]: Finished difference Result 258 states and 288 transitions. [2022-07-11 23:44:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:44:55,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 108 [2022-07-11 23:44:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:55,188 INFO L225 Difference]: With dead ends: 258 [2022-07-11 23:44:55,188 INFO L226 Difference]: Without dead ends: 198 [2022-07-11 23:44:55,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:44:55,189 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 116 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:55,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 384 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:44:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-11 23:44:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 184. [2022-07-11 23:44:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 166 states have internal predecessors, (184), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-11 23:44:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2022-07-11 23:44:55,202 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 108 [2022-07-11 23:44:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:55,203 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2022-07-11 23:44:55,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:44:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2022-07-11 23:44:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-11 23:44:55,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:55,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:55,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-11 23:44:55,204 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash 171236406, now seen corresponding path program 1 times [2022-07-11 23:44:55,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191297284] [2022-07-11 23:44:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:55,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-11 23:44:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-11 23:44:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:44:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:55,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191297284] [2022-07-11 23:44:55,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191297284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:55,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:55,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:55,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579288048] [2022-07-11 23:44:55,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:55,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:55,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:55,271 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 5 states have internal predecessors, (96), 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) [2022-07-11 23:44:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:55,363 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2022-07-11 23:44:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:44:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 5 states have internal predecessors, (96), 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 114 [2022-07-11 23:44:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:55,370 INFO L225 Difference]: With dead ends: 238 [2022-07-11 23:44:55,370 INFO L226 Difference]: Without dead ends: 163 [2022-07-11 23:44:55,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:44:55,371 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 46 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:55,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 751 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-11 23:44:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-11 23:44:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.1095890410958904) internal successors, (162), 147 states have internal predecessors, (162), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 23:44:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 178 transitions. [2022-07-11 23:44:55,382 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 178 transitions. Word has length 114 [2022-07-11 23:44:55,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:55,382 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 178 transitions. [2022-07-11 23:44:55,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 5 states have internal predecessors, (96), 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) [2022-07-11 23:44:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 178 transitions. [2022-07-11 23:44:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-11 23:44:55,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:55,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:55,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-11 23:44:55,383 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:55,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2140745716, now seen corresponding path program 1 times [2022-07-11 23:44:55,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360323292] [2022-07-11 23:44:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:55,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-11 23:44:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-11 23:44:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:44:55,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360323292] [2022-07-11 23:44:55,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360323292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:55,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:55,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:44:55,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809653744] [2022-07-11 23:44:55,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:55,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:44:55,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:55,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:44:55,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:44:55,466 INFO L87 Difference]: Start difference. First operand 163 states and 178 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:44:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:55,645 INFO L93 Difference]: Finished difference Result 334 states and 366 transitions. [2022-07-11 23:44:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:44:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 115 [2022-07-11 23:44:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:55,646 INFO L225 Difference]: With dead ends: 334 [2022-07-11 23:44:55,646 INFO L226 Difference]: Without dead ends: 163 [2022-07-11 23:44:55,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:44:55,647 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 130 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:55,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 815 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-11 23:44:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-11 23:44:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.1027397260273972) internal successors, (161), 147 states have internal predecessors, (161), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 23:44:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 177 transitions. [2022-07-11 23:44:55,658 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 177 transitions. Word has length 115 [2022-07-11 23:44:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:55,659 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 177 transitions. [2022-07-11 23:44:55,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:44:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 177 transitions. [2022-07-11 23:44:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-11 23:44:55,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:44:55,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:44:55,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-11 23:44:55,660 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:44:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:44:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash 493382774, now seen corresponding path program 1 times [2022-07-11 23:44:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:44:55,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808794116] [2022-07-11 23:44:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:44:55,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:44:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:44:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 23:44:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-11 23:44:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-11 23:44:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:44:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 23:44:55,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:44:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808794116] [2022-07-11 23:44:55,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808794116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:44:55,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:44:55,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-11 23:44:55,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891311011] [2022-07-11 23:44:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:44:55,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 23:44:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:44:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 23:44:55,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:44:55,749 INFO L87 Difference]: Start difference. First operand 163 states and 177 transitions. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 10 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:44:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:44:55,990 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2022-07-11 23:44:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:44:55,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 10 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 115 [2022-07-11 23:44:55,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:44:55,995 INFO L225 Difference]: With dead ends: 176 [2022-07-11 23:44:55,995 INFO L226 Difference]: Without dead ends: 0 [2022-07-11 23:44:55,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:44:55,996 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 379 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:44:55,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 743 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:44:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-11 23:44:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-11 23:44:55,997 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) [2022-07-11 23:44:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-11 23:44:55,997 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2022-07-11 23:44:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:44:55,997 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-11 23:44:55,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 10 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:44:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-11 23:44:55,997 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-11 23:44:55,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-11 23:44:56,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-11 23:44:56,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.