./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 eb692b52 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-?-eb692b5 [2022-07-19 10:55:05,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:55:05,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:55:05,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:55:05,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:55:05,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:55:05,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:55:05,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:55:05,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:55:05,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:55:05,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:55:05,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:55:05,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:55:05,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:55:05,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:55:05,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:55:05,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:55:05,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:55:05,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:55:05,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:55:05,632 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:55:05,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:55:05,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:55:05,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:55:05,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:55:05,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:55:05,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:55:05,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:55:05,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:55:05,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:55:05,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:55:05,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:55:05,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:55:05,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:55:05,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:55:05,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:55:05,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:55:05,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:55:05,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:55:05,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:55:05,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:55:05,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:55:05,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:55:05,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:55:05,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:55:05,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:55:05,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:55:05,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:55:05,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:55:05,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:55:05,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:55:05,666 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:55:05,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:55:05,666 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:55:05,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:55:05,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:55:05,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:55:05,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:55:05,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:55:05,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:55:05,668 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:55:05,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:55:05,668 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:55:05,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:55:05,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:55:05,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:55:05,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:55:05,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:55:05,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:55:05,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:55:05,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:55:05,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:55:05,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:55:05,670 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:55:05,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:55:05,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:55:05,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b15a3429ae983cb571408e453cffd56861eca4f5fc7e760aad97ad24a44474ad [2022-07-19 10:55:05,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:55:05,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:55:05,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:55:05,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:55:05,882 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:55:05,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-07-19 10:55:05,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55193f07a/29f8269d405c466a88c48b17319750a8/FLAG2795c09d8 [2022-07-19 10:55:06,307 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:55:06,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-07-19 10:55:06,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55193f07a/29f8269d405c466a88c48b17319750a8/FLAG2795c09d8 [2022-07-19 10:55:06,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55193f07a/29f8269d405c466a88c48b17319750a8 [2022-07-19 10:55:06,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:55:06,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:55:06,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:55:06,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:55:06,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:55:06,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:55:06" (1/1) ... [2022-07-19 10:55:06,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7950c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:06, skipping insertion in model container [2022-07-19 10:55:06,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:55:06" (1/1) ... [2022-07-19 10:55:06,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:55:06,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:55:06,997 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] [2022-07-19 10:55:07,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:55:07,009 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:55:07,081 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] [2022-07-19 10:55:07,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:55:07,098 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:55:07,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07 WrapperNode [2022-07-19 10:55:07,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:55:07,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:55:07,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:55:07,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:55:07,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,160 INFO L137 Inliner]: procedures = 41, calls = 76, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 1331 [2022-07-19 10:55:07,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:55:07,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:55:07,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:55:07,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:55:07,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:55:07,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:55:07,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:55:07,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:55:07,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (1/1) ... [2022-07-19 10:55:07,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:55:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:55:07,273 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) [2022-07-19 10:55:07,283 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 [2022-07-19 10:55:07,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:55:07,306 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-19 10:55:07,306 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-19 10:55:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-19 10:55:07,307 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-19 10:55:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-19 10:55:07,307 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-19 10:55:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-19 10:55:07,307 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-19 10:55:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-19 10:55:07,308 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-19 10:55:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:55:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-19 10:55:07,308 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-19 10:55:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-19 10:55:07,308 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-19 10:55:07,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:55:07,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:55:07,500 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:55:07,507 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:55:07,512 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,594 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-19 10:55:07,597 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-19 10:55:07,597 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,609 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-19 10:55:07,609 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-19 10:55:07,619 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,626 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,634 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,635 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,638 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,640 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:07,645 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:08,054 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##170: assume !false; [2022-07-19 10:55:08,055 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##180: assume false; [2022-07-19 10:55:08,055 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##181: assume !false; [2022-07-19 10:55:08,055 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##67: assume !false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##66: assume false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##127: assume !false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##169: assume false; [2022-07-19 10:55:08,056 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##236: assume !false; [2022-07-19 10:55:08,057 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##235: assume false; [2022-07-19 10:55:08,057 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##126: assume false; [2022-07-19 10:55:08,060 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:08,093 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-07-19 10:55:08,094 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-07-19 10:55:08,095 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:08,095 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:08,096 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:55:08,118 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-19 10:55:08,119 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-19 10:55:08,119 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-19 10:55:08,119 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-19 10:55:08,120 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-19 10:55:08,120 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-19 10:55:08,129 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:55:08,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:55:08,141 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 10:55:08,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:55:08 BoogieIcfgContainer [2022-07-19 10:55:08,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:55:08,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:55:08,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:55:08,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:55:08,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:55:06" (1/3) ... [2022-07-19 10:55:08,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e694b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:55:08, skipping insertion in model container [2022-07-19 10:55:08,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:55:07" (2/3) ... [2022-07-19 10:55:08,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e694b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:55:08, skipping insertion in model container [2022-07-19 10:55:08,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:55:08" (3/3) ... [2022-07-19 10:55:08,151 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2022-07-19 10:55:08,160 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:55:08,160 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:55:08,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:55:08,202 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@78e479db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@75658178 [2022-07-19 10:55:08,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:55:08,206 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) [2022-07-19 10:55:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 10:55:08,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:08,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:55:08,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash -581881369, now seen corresponding path program 1 times [2022-07-19 10:55:08,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:08,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778325767] [2022-07-19 10:55:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:08,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:08,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:08,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778325767] [2022-07-19 10:55:08,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778325767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:08,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:08,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:55:08,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529322838] [2022-07-19 10:55:08,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:08,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:55:08,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:08,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:55:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:55:08,408 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) [2022-07-19 10:55:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:08,486 INFO L93 Difference]: Finished difference Result 511 states and 794 transitions. [2022-07-19 10:55:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:55:08,488 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 [2022-07-19 10:55:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:08,496 INFO L225 Difference]: With dead ends: 511 [2022-07-19 10:55:08,496 INFO L226 Difference]: Without dead ends: 310 [2022-07-19 10:55:08,500 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 [2022-07-19 10:55:08,502 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 [2022-07-19 10:55:08,503 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] [2022-07-19 10:55:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-07-19 10:55:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-07-19 10:55:08,563 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) [2022-07-19 10:55:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 453 transitions. [2022-07-19 10:55:08,577 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 453 transitions. Word has length 13 [2022-07-19 10:55:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:08,578 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 453 transitions. [2022-07-19 10:55:08,578 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) [2022-07-19 10:55:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 453 transitions. [2022-07-19 10:55:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 10:55:08,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:08,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:55:08,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:55:08,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1536856865, now seen corresponding path program 1 times [2022-07-19 10:55:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:08,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607846777] [2022-07-19 10:55:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:08,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607846777] [2022-07-19 10:55:08,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607846777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:08,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:08,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:55:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80698957] [2022-07-19 10:55:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:55:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:55:08,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:55:08,658 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) [2022-07-19 10:55:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:08,768 INFO L93 Difference]: Finished difference Result 558 states and 805 transitions. [2022-07-19 10:55:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:55:08,768 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 [2022-07-19 10:55:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:08,771 INFO L225 Difference]: With dead ends: 558 [2022-07-19 10:55:08,771 INFO L226 Difference]: Without dead ends: 428 [2022-07-19 10:55:08,772 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 [2022-07-19 10:55:08,773 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 [2022-07-19 10:55:08,773 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] [2022-07-19 10:55:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-19 10:55:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 411. [2022-07-19 10:55:08,791 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) [2022-07-19 10:55:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 595 transitions. [2022-07-19 10:55:08,794 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 595 transitions. Word has length 16 [2022-07-19 10:55:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:08,794 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 595 transitions. [2022-07-19 10:55:08,795 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) [2022-07-19 10:55:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 595 transitions. [2022-07-19 10:55:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 10:55:08,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:08,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:55:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:55:08,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash -866854987, now seen corresponding path program 1 times [2022-07-19 10:55:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692669293] [2022-07-19 10:55:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:08,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692669293] [2022-07-19 10:55:08,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692669293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:08,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:08,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:55:08,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685609941] [2022-07-19 10:55:08,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:08,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:55:08,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:55:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:55:08,837 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) [2022-07-19 10:55:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:08,862 INFO L93 Difference]: Finished difference Result 516 states and 730 transitions. [2022-07-19 10:55:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:55:08,863 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 [2022-07-19 10:55:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:08,865 INFO L225 Difference]: With dead ends: 516 [2022-07-19 10:55:08,865 INFO L226 Difference]: Without dead ends: 497 [2022-07-19 10:55:08,866 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 [2022-07-19 10:55:08,866 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 [2022-07-19 10:55:08,867 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] [2022-07-19 10:55:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-07-19 10:55:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 459. [2022-07-19 10:55:08,885 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) [2022-07-19 10:55:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 659 transitions. [2022-07-19 10:55:08,887 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 659 transitions. Word has length 19 [2022-07-19 10:55:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:08,887 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 659 transitions. [2022-07-19 10:55:08,887 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) [2022-07-19 10:55:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 659 transitions. [2022-07-19 10:55:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:55:08,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:08,888 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] [2022-07-19 10:55:08,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:55:08,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash 122564178, now seen corresponding path program 1 times [2022-07-19 10:55:08,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:08,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921398890] [2022-07-19 10:55:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:08,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921398890] [2022-07-19 10:55:08,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921398890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:08,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:08,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:55:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674295638] [2022-07-19 10:55:08,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:08,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:55:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:55:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:55:08,924 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) [2022-07-19 10:55:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:08,973 INFO L93 Difference]: Finished difference Result 861 states and 1224 transitions. [2022-07-19 10:55:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:55:08,973 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 [2022-07-19 10:55:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:08,980 INFO L225 Difference]: With dead ends: 861 [2022-07-19 10:55:08,980 INFO L226 Difference]: Without dead ends: 638 [2022-07-19 10:55:08,982 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 [2022-07-19 10:55:08,991 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 [2022-07-19 10:55:08,992 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] [2022-07-19 10:55:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-07-19 10:55:09,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 613. [2022-07-19 10:55:09,016 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) [2022-07-19 10:55:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 875 transitions. [2022-07-19 10:55:09,019 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 875 transitions. Word has length 22 [2022-07-19 10:55:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:09,020 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 875 transitions. [2022-07-19 10:55:09,020 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) [2022-07-19 10:55:09,020 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 875 transitions. [2022-07-19 10:55:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:55:09,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:09,022 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] [2022-07-19 10:55:09,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 10:55:09,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash -278451968, now seen corresponding path program 1 times [2022-07-19 10:55:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:09,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251091426] [2022-07-19 10:55:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:09,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 10:55:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:55:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:09,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251091426] [2022-07-19 10:55:09,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251091426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:09,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:09,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:55:09,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175264394] [2022-07-19 10:55:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:55:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:55:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:55:09,063 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) [2022-07-19 10:55:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:09,293 INFO L93 Difference]: Finished difference Result 674 states and 955 transitions. [2022-07-19 10:55:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:09,294 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 [2022-07-19 10:55:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:09,298 INFO L225 Difference]: With dead ends: 674 [2022-07-19 10:55:09,298 INFO L226 Difference]: Without dead ends: 669 [2022-07-19 10:55:09,298 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 [2022-07-19 10:55:09,302 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 188 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-19 10:55:09,302 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] [2022-07-19 10:55:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-19 10:55:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 648. [2022-07-19 10:55:09,330 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) [2022-07-19 10:55:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 921 transitions. [2022-07-19 10:55:09,333 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 921 transitions. Word has length 30 [2022-07-19 10:55:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:09,334 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 921 transitions. [2022-07-19 10:55:09,334 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) [2022-07-19 10:55:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 921 transitions. [2022-07-19 10:55:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:55:09,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:09,339 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] [2022-07-19 10:55:09,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 10:55:09,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash 935646203, now seen corresponding path program 1 times [2022-07-19 10:55:09,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:09,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135468620] [2022-07-19 10:55:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:09,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:09,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:09,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135468620] [2022-07-19 10:55:09,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135468620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:09,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:09,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:55:09,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492935262] [2022-07-19 10:55:09,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:09,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:55:09,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:55:09,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:55:09,397 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) [2022-07-19 10:55:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:09,454 INFO L93 Difference]: Finished difference Result 663 states and 941 transitions. [2022-07-19 10:55:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:55:09,455 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 [2022-07-19 10:55:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:09,457 INFO L225 Difference]: With dead ends: 663 [2022-07-19 10:55:09,457 INFO L226 Difference]: Without dead ends: 660 [2022-07-19 10:55:09,458 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 [2022-07-19 10:55:09,458 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 [2022-07-19 10:55:09,458 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] [2022-07-19 10:55:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-07-19 10:55:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 659. [2022-07-19 10:55:09,474 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) [2022-07-19 10:55:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 935 transitions. [2022-07-19 10:55:09,476 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 935 transitions. Word has length 28 [2022-07-19 10:55:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:09,476 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 935 transitions. [2022-07-19 10:55:09,477 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) [2022-07-19 10:55:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 935 transitions. [2022-07-19 10:55:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:55:09,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:09,478 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] [2022-07-19 10:55:09,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 10:55:09,478 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash -525593641, now seen corresponding path program 1 times [2022-07-19 10:55:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735563471] [2022-07-19 10:55:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:09,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:55:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:55:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:09,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:09,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735563471] [2022-07-19 10:55:09,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735563471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:09,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:09,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:09,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559912029] [2022-07-19 10:55:09,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:09,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:09,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:09,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:09,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:09,550 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) [2022-07-19 10:55:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:09,840 INFO L93 Difference]: Finished difference Result 686 states and 968 transitions. [2022-07-19 10:55:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:09,841 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 [2022-07-19 10:55:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:09,843 INFO L225 Difference]: With dead ends: 686 [2022-07-19 10:55:09,843 INFO L226 Difference]: Without dead ends: 680 [2022-07-19 10:55:09,844 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 [2022-07-19 10:55:09,844 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 [2022-07-19 10:55:09,844 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] [2022-07-19 10:55:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-07-19 10:55:09,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 659. [2022-07-19 10:55:09,861 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) [2022-07-19 10:55:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 934 transitions. [2022-07-19 10:55:09,864 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 934 transitions. Word has length 30 [2022-07-19 10:55:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:09,864 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 934 transitions. [2022-07-19 10:55:09,864 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) [2022-07-19 10:55:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 934 transitions. [2022-07-19 10:55:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:55:09,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:09,865 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] [2022-07-19 10:55:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 10:55:09,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:09,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1034674387, now seen corresponding path program 1 times [2022-07-19 10:55:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:09,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966238737] [2022-07-19 10:55:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 10:55:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:55:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:09,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966238737] [2022-07-19 10:55:09,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966238737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:09,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:09,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:09,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539621660] [2022-07-19 10:55:09,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:09,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:09,990 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) [2022-07-19 10:55:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:10,229 INFO L93 Difference]: Finished difference Result 686 states and 967 transitions. [2022-07-19 10:55:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:10,229 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 [2022-07-19 10:55:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:10,232 INFO L225 Difference]: With dead ends: 686 [2022-07-19 10:55:10,232 INFO L226 Difference]: Without dead ends: 680 [2022-07-19 10:55:10,232 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 [2022-07-19 10:55:10,233 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 [2022-07-19 10:55:10,233 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] [2022-07-19 10:55:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-07-19 10:55:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 659. [2022-07-19 10:55:10,268 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) [2022-07-19 10:55:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 933 transitions. [2022-07-19 10:55:10,274 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 933 transitions. Word has length 32 [2022-07-19 10:55:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:10,275 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 933 transitions. [2022-07-19 10:55:10,275 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) [2022-07-19 10:55:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 933 transitions. [2022-07-19 10:55:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:55:10,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:10,276 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] [2022-07-19 10:55:10,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 10:55:10,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1926147241, now seen corresponding path program 1 times [2022-07-19 10:55:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:10,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007586694] [2022-07-19 10:55:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:10,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:10,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 10:55:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:55:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:10,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007586694] [2022-07-19 10:55:10,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007586694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:10,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:10,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303079912] [2022-07-19 10:55:10,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:10,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:10,324 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) [2022-07-19 10:55:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:10,587 INFO L93 Difference]: Finished difference Result 691 states and 972 transitions. [2022-07-19 10:55:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:55:10,588 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 [2022-07-19 10:55:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:10,590 INFO L225 Difference]: With dead ends: 691 [2022-07-19 10:55:10,590 INFO L226 Difference]: Without dead ends: 676 [2022-07-19 10:55:10,590 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 [2022-07-19 10:55:10,591 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 [2022-07-19 10:55:10,591 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] [2022-07-19 10:55:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-19 10:55:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 657. [2022-07-19 10:55:10,607 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) [2022-07-19 10:55:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 929 transitions. [2022-07-19 10:55:10,610 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 929 transitions. Word has length 33 [2022-07-19 10:55:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:10,610 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 929 transitions. [2022-07-19 10:55:10,611 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) [2022-07-19 10:55:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 929 transitions. [2022-07-19 10:55:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:55:10,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:10,611 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] [2022-07-19 10:55:10,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 10:55:10,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash 898874144, now seen corresponding path program 1 times [2022-07-19 10:55:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:10,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215288741] [2022-07-19 10:55:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:10,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:55:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:55:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:10,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:10,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215288741] [2022-07-19 10:55:10,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215288741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:10,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:10,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682319647] [2022-07-19 10:55:10,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:10,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:10,665 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) [2022-07-19 10:55:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:10,887 INFO L93 Difference]: Finished difference Result 689 states and 968 transitions. [2022-07-19 10:55:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:55:10,888 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 [2022-07-19 10:55:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:10,890 INFO L225 Difference]: With dead ends: 689 [2022-07-19 10:55:10,890 INFO L226 Difference]: Without dead ends: 669 [2022-07-19 10:55:10,891 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 [2022-07-19 10:55:10,891 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 394 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-19 10:55:10,891 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] [2022-07-19 10:55:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-19 10:55:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 650. [2022-07-19 10:55:10,907 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) [2022-07-19 10:55:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 920 transitions. [2022-07-19 10:55:10,909 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 920 transitions. Word has length 32 [2022-07-19 10:55:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:10,910 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 920 transitions. [2022-07-19 10:55:10,910 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) [2022-07-19 10:55:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 920 transitions. [2022-07-19 10:55:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:55:10,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:10,911 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] [2022-07-19 10:55:10,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 10:55:10,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:10,911 INFO L85 PathProgramCache]: Analyzing trace with hash -608614915, now seen corresponding path program 1 times [2022-07-19 10:55:10,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:10,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016647221] [2022-07-19 10:55:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:10,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:10,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016647221] [2022-07-19 10:55:10,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016647221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:10,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:10,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:55:10,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860036452] [2022-07-19 10:55:10,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:10,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:55:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:10,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:55:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:55:10,933 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) [2022-07-19 10:55:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:10,971 INFO L93 Difference]: Finished difference Result 691 states and 968 transitions. [2022-07-19 10:55:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:55:10,971 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 [2022-07-19 10:55:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:10,973 INFO L225 Difference]: With dead ends: 691 [2022-07-19 10:55:10,974 INFO L226 Difference]: Without dead ends: 625 [2022-07-19 10:55:10,974 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 [2022-07-19 10:55:10,975 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 [2022-07-19 10:55:10,975 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] [2022-07-19 10:55:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-07-19 10:55:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 621. [2022-07-19 10:55:10,993 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) [2022-07-19 10:55:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 879 transitions. [2022-07-19 10:55:10,995 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 879 transitions. Word has length 30 [2022-07-19 10:55:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:10,995 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 879 transitions. [2022-07-19 10:55:10,995 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) [2022-07-19 10:55:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 879 transitions. [2022-07-19 10:55:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 10:55:10,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:10,996 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] [2022-07-19 10:55:10,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 10:55:10,997 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash -444205803, now seen corresponding path program 1 times [2022-07-19 10:55:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:10,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292606987] [2022-07-19 10:55:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:10,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:11,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:11,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292606987] [2022-07-19 10:55:11,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292606987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:11,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:11,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:55:11,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077545680] [2022-07-19 10:55:11,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:55:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:55:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:55:11,021 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) [2022-07-19 10:55:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:11,059 INFO L93 Difference]: Finished difference Result 657 states and 920 transitions. [2022-07-19 10:55:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:55:11,059 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 [2022-07-19 10:55:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:11,061 INFO L225 Difference]: With dead ends: 657 [2022-07-19 10:55:11,061 INFO L226 Difference]: Without dead ends: 637 [2022-07-19 10:55:11,062 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 [2022-07-19 10:55:11,062 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 [2022-07-19 10:55:11,062 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] [2022-07-19 10:55:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-07-19 10:55:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 623. [2022-07-19 10:55:11,077 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) [2022-07-19 10:55:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 881 transitions. [2022-07-19 10:55:11,079 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 881 transitions. Word has length 30 [2022-07-19 10:55:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:11,080 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 881 transitions. [2022-07-19 10:55:11,080 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) [2022-07-19 10:55:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 881 transitions. [2022-07-19 10:55:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 10:55:11,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:11,081 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] [2022-07-19 10:55:11,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 10:55:11,081 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1157172893, now seen corresponding path program 1 times [2022-07-19 10:55:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:11,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584540723] [2022-07-19 10:55:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:11,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:11,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:11,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584540723] [2022-07-19 10:55:11,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584540723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:11,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:11,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:55:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965367517] [2022-07-19 10:55:11,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:55:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:55:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:55:11,103 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) [2022-07-19 10:55:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:11,139 INFO L93 Difference]: Finished difference Result 659 states and 922 transitions. [2022-07-19 10:55:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:55:11,139 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 [2022-07-19 10:55:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:11,141 INFO L225 Difference]: With dead ends: 659 [2022-07-19 10:55:11,141 INFO L226 Difference]: Without dead ends: 639 [2022-07-19 10:55:11,142 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 [2022-07-19 10:55:11,142 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 [2022-07-19 10:55:11,142 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] [2022-07-19 10:55:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-19 10:55:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 623. [2022-07-19 10:55:11,157 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) [2022-07-19 10:55:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 881 transitions. [2022-07-19 10:55:11,159 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 881 transitions. Word has length 31 [2022-07-19 10:55:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:11,159 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 881 transitions. [2022-07-19 10:55:11,159 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) [2022-07-19 10:55:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 881 transitions. [2022-07-19 10:55:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:55:11,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:11,160 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] [2022-07-19 10:55:11,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 10:55:11,160 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:11,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1727959565, now seen corresponding path program 1 times [2022-07-19 10:55:11,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:11,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973623908] [2022-07-19 10:55:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:11,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:11,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973623908] [2022-07-19 10:55:11,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973623908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:11,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:11,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:55:11,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721787119] [2022-07-19 10:55:11,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:11,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:55:11,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:11,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:55:11,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:55:11,199 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) [2022-07-19 10:55:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:11,395 INFO L93 Difference]: Finished difference Result 884 states and 1250 transitions. [2022-07-19 10:55:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:55:11,396 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 [2022-07-19 10:55:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:11,399 INFO L225 Difference]: With dead ends: 884 [2022-07-19 10:55:11,399 INFO L226 Difference]: Without dead ends: 881 [2022-07-19 10:55:11,399 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 [2022-07-19 10:55:11,400 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 [2022-07-19 10:55:11,400 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] [2022-07-19 10:55:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-07-19 10:55:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 702. [2022-07-19 10:55:11,418 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) [2022-07-19 10:55:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 993 transitions. [2022-07-19 10:55:11,421 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 993 transitions. Word has length 34 [2022-07-19 10:55:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:11,421 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 993 transitions. [2022-07-19 10:55:11,421 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) [2022-07-19 10:55:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 993 transitions. [2022-07-19 10:55:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:55:11,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:11,422 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] [2022-07-19 10:55:11,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 10:55:11,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2030213193, now seen corresponding path program 1 times [2022-07-19 10:55:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:11,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62687210] [2022-07-19 10:55:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:11,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 10:55:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:11,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:11,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62687210] [2022-07-19 10:55:11,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62687210] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:11,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:11,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:55:11,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263818868] [2022-07-19 10:55:11,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:11,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:55:11,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:55:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:55:11,447 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) [2022-07-19 10:55:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:11,574 INFO L93 Difference]: Finished difference Result 733 states and 1030 transitions. [2022-07-19 10:55:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:55:11,574 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 [2022-07-19 10:55:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:11,576 INFO L225 Difference]: With dead ends: 733 [2022-07-19 10:55:11,576 INFO L226 Difference]: Without dead ends: 717 [2022-07-19 10:55:11,577 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 [2022-07-19 10:55:11,577 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 [2022-07-19 10:55:11,577 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] [2022-07-19 10:55:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-07-19 10:55:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 700. [2022-07-19 10:55:11,594 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) [2022-07-19 10:55:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 989 transitions. [2022-07-19 10:55:11,610 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 989 transitions. Word has length 33 [2022-07-19 10:55:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:11,611 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 989 transitions. [2022-07-19 10:55:11,611 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) [2022-07-19 10:55:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 989 transitions. [2022-07-19 10:55:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:55:11,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:11,612 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] [2022-07-19 10:55:11,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 10:55:11,612 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2029473173, now seen corresponding path program 1 times [2022-07-19 10:55:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:11,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69133280] [2022-07-19 10:55:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69133280] [2022-07-19 10:55:11,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69133280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:11,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:11,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:55:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461823917] [2022-07-19 10:55:11,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:11,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:55:11,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:55:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:55:11,654 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) [2022-07-19 10:55:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:11,918 INFO L93 Difference]: Finished difference Result 1172 states and 1614 transitions. [2022-07-19 10:55:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:11,919 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 [2022-07-19 10:55:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:11,921 INFO L225 Difference]: With dead ends: 1172 [2022-07-19 10:55:11,921 INFO L226 Difference]: Without dead ends: 729 [2022-07-19 10:55:11,922 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 [2022-07-19 10:55:11,923 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 [2022-07-19 10:55:11,923 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] [2022-07-19 10:55:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-07-19 10:55:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 691. [2022-07-19 10:55:11,942 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) [2022-07-19 10:55:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 968 transitions. [2022-07-19 10:55:11,944 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 968 transitions. Word has length 35 [2022-07-19 10:55:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:11,945 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 968 transitions. [2022-07-19 10:55:11,945 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) [2022-07-19 10:55:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 968 transitions. [2022-07-19 10:55:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:55:11,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:11,946 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] [2022-07-19 10:55:11,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 10:55:11,946 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:11,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:11,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1933424636, now seen corresponding path program 1 times [2022-07-19 10:55:11,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:11,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322207402] [2022-07-19 10:55:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:11,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:55:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:11,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322207402] [2022-07-19 10:55:11,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322207402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:11,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:11,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:55:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409126835] [2022-07-19 10:55:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:11,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:55:11,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:55:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:55:11,974 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) [2022-07-19 10:55:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:12,118 INFO L93 Difference]: Finished difference Result 722 states and 1005 transitions. [2022-07-19 10:55:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:55:12,118 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 [2022-07-19 10:55:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:12,121 INFO L225 Difference]: With dead ends: 722 [2022-07-19 10:55:12,121 INFO L226 Difference]: Without dead ends: 706 [2022-07-19 10:55:12,121 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 [2022-07-19 10:55:12,121 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 [2022-07-19 10:55:12,122 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] [2022-07-19 10:55:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-07-19 10:55:12,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 689. [2022-07-19 10:55:12,140 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) [2022-07-19 10:55:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 964 transitions. [2022-07-19 10:55:12,142 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 964 transitions. Word has length 35 [2022-07-19 10:55:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:12,143 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 964 transitions. [2022-07-19 10:55:12,143 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) [2022-07-19 10:55:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 964 transitions. [2022-07-19 10:55:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 10:55:12,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:12,144 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] [2022-07-19 10:55:12,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 10:55:12,144 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2075108197, now seen corresponding path program 1 times [2022-07-19 10:55:12,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898641943] [2022-07-19 10:55:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:12,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:12,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898641943] [2022-07-19 10:55:12,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898641943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:12,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:12,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:55:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529546710] [2022-07-19 10:55:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:12,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:55:12,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:55:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:55:12,167 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) [2022-07-19 10:55:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:12,221 INFO L93 Difference]: Finished difference Result 1096 states and 1521 transitions. [2022-07-19 10:55:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:55:12,222 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 [2022-07-19 10:55:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:12,224 INFO L225 Difference]: With dead ends: 1096 [2022-07-19 10:55:12,224 INFO L226 Difference]: Without dead ends: 697 [2022-07-19 10:55:12,225 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 [2022-07-19 10:55:12,226 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 [2022-07-19 10:55:12,226 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] [2022-07-19 10:55:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-07-19 10:55:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2022-07-19 10:55:12,247 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) [2022-07-19 10:55:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 975 transitions. [2022-07-19 10:55:12,249 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 975 transitions. Word has length 37 [2022-07-19 10:55:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:12,249 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 975 transitions. [2022-07-19 10:55:12,249 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) [2022-07-19 10:55:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 975 transitions. [2022-07-19 10:55:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:55:12,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:12,250 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] [2022-07-19 10:55:12,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 10:55:12,251 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash 657684690, now seen corresponding path program 1 times [2022-07-19 10:55:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:12,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900187282] [2022-07-19 10:55:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:12,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:12,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:55:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:12,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:12,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900187282] [2022-07-19 10:55:12,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900187282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:12,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:12,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:55:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21659895] [2022-07-19 10:55:12,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:55:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:55:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:55:12,282 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) [2022-07-19 10:55:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:12,464 INFO L93 Difference]: Finished difference Result 722 states and 1002 transitions. [2022-07-19 10:55:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:12,464 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 [2022-07-19 10:55:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:12,467 INFO L225 Difference]: With dead ends: 722 [2022-07-19 10:55:12,467 INFO L226 Difference]: Without dead ends: 704 [2022-07-19 10:55:12,467 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 [2022-07-19 10:55:12,468 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:12,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1693 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:55:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-07-19 10:55:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2022-07-19 10:55:12,498 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) [2022-07-19 10:55:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 963 transitions. [2022-07-19 10:55:12,501 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 963 transitions. Word has length 38 [2022-07-19 10:55:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:12,501 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 963 transitions. [2022-07-19 10:55:12,501 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) [2022-07-19 10:55:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 963 transitions. [2022-07-19 10:55:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:55:12,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:12,502 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] [2022-07-19 10:55:12,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 10:55:12,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:12,503 INFO L85 PathProgramCache]: Analyzing trace with hash 101448372, now seen corresponding path program 1 times [2022-07-19 10:55:12,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:12,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327360927] [2022-07-19 10:55:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:12,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:55:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:12,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327360927] [2022-07-19 10:55:12,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327360927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:12,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:12,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:12,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447953040] [2022-07-19 10:55:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:12,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:12,543 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) [2022-07-19 10:55:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:12,882 INFO L93 Difference]: Finished difference Result 783 states and 1067 transitions. [2022-07-19 10:55:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:55:12,883 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 [2022-07-19 10:55:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:12,885 INFO L225 Difference]: With dead ends: 783 [2022-07-19 10:55:12,885 INFO L226 Difference]: Without dead ends: 717 [2022-07-19 10:55:12,886 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 [2022-07-19 10:55:12,886 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 [2022-07-19 10:55:12,886 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] [2022-07-19 10:55:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-07-19 10:55:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 707. [2022-07-19 10:55:12,909 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) [2022-07-19 10:55:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 973 transitions. [2022-07-19 10:55:12,910 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 973 transitions. Word has length 38 [2022-07-19 10:55:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:12,911 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 973 transitions. [2022-07-19 10:55:12,911 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) [2022-07-19 10:55:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 973 transitions. [2022-07-19 10:55:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:55:12,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:12,912 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] [2022-07-19 10:55:12,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 10:55:12,912 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2119312611, now seen corresponding path program 1 times [2022-07-19 10:55:12,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:12,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087502055] [2022-07-19 10:55:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:12,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:12,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:55:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:12,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:12,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087502055] [2022-07-19 10:55:12,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087502055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:12,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:12,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:12,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923670090] [2022-07-19 10:55:12,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:12,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:12,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:12,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:12,947 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) [2022-07-19 10:55:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:13,156 INFO L93 Difference]: Finished difference Result 727 states and 993 transitions. [2022-07-19 10:55:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:55:13,157 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 [2022-07-19 10:55:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:13,159 INFO L225 Difference]: With dead ends: 727 [2022-07-19 10:55:13,159 INFO L226 Difference]: Without dead ends: 705 [2022-07-19 10:55:13,159 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 [2022-07-19 10:55:13,160 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 [2022-07-19 10:55:13,160 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] [2022-07-19 10:55:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-07-19 10:55:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 699. [2022-07-19 10:55:13,189 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) [2022-07-19 10:55:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 961 transitions. [2022-07-19 10:55:13,191 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 961 transitions. Word has length 39 [2022-07-19 10:55:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:13,191 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 961 transitions. [2022-07-19 10:55:13,191 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) [2022-07-19 10:55:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 961 transitions. [2022-07-19 10:55:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:55:13,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:13,192 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] [2022-07-19 10:55:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 10:55:13,193 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:13,193 INFO L85 PathProgramCache]: Analyzing trace with hash 114444064, now seen corresponding path program 1 times [2022-07-19 10:55:13,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:13,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931265675] [2022-07-19 10:55:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:13,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:13,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:13,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931265675] [2022-07-19 10:55:13,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931265675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:13,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:13,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332140685] [2022-07-19 10:55:13,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:13,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:13,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:13,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:13,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:13,232 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) [2022-07-19 10:55:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:13,440 INFO L93 Difference]: Finished difference Result 754 states and 1025 transitions. [2022-07-19 10:55:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:13,441 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 [2022-07-19 10:55:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:13,443 INFO L225 Difference]: With dead ends: 754 [2022-07-19 10:55:13,443 INFO L226 Difference]: Without dead ends: 709 [2022-07-19 10:55:13,444 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 [2022-07-19 10:55:13,444 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 [2022-07-19 10:55:13,444 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] [2022-07-19 10:55:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-07-19 10:55:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 686. [2022-07-19 10:55:13,466 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) [2022-07-19 10:55:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 941 transitions. [2022-07-19 10:55:13,468 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 941 transitions. Word has length 39 [2022-07-19 10:55:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:13,468 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 941 transitions. [2022-07-19 10:55:13,468 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) [2022-07-19 10:55:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 941 transitions. [2022-07-19 10:55:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:55:13,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:13,469 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] [2022-07-19 10:55:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 10:55:13,470 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2104766079, now seen corresponding path program 1 times [2022-07-19 10:55:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628583394] [2022-07-19 10:55:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:13,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:13,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:13,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628583394] [2022-07-19 10:55:13,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628583394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:13,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:13,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:13,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520222086] [2022-07-19 10:55:13,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:13,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:13,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:13,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:13,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:13,517 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) [2022-07-19 10:55:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:13,752 INFO L93 Difference]: Finished difference Result 712 states and 971 transitions. [2022-07-19 10:55:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:55:13,753 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 [2022-07-19 10:55:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:13,756 INFO L225 Difference]: With dead ends: 712 [2022-07-19 10:55:13,756 INFO L226 Difference]: Without dead ends: 689 [2022-07-19 10:55:13,756 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 [2022-07-19 10:55:13,757 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 [2022-07-19 10:55:13,757 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] [2022-07-19 10:55:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-07-19 10:55:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 688. [2022-07-19 10:55:13,780 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) [2022-07-19 10:55:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 943 transitions. [2022-07-19 10:55:13,782 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 943 transitions. Word has length 39 [2022-07-19 10:55:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:13,782 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 943 transitions. [2022-07-19 10:55:13,782 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) [2022-07-19 10:55:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 943 transitions. [2022-07-19 10:55:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:55:13,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:13,783 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] [2022-07-19 10:55:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 10:55:13,783 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash 225426455, now seen corresponding path program 1 times [2022-07-19 10:55:13,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:13,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301552194] [2022-07-19 10:55:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:13,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:13,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:13,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:13,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301552194] [2022-07-19 10:55:13,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301552194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:13,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:13,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:55:13,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620379467] [2022-07-19 10:55:13,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:13,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:55:13,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:55:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:55:13,813 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) [2022-07-19 10:55:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:13,997 INFO L93 Difference]: Finished difference Result 772 states and 1027 transitions. [2022-07-19 10:55:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:13,997 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 [2022-07-19 10:55:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:13,999 INFO L225 Difference]: With dead ends: 772 [2022-07-19 10:55:13,999 INFO L226 Difference]: Without dead ends: 510 [2022-07-19 10:55:14,000 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 [2022-07-19 10:55:14,000 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 [2022-07-19 10:55:14,000 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] [2022-07-19 10:55:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-19 10:55:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 469. [2022-07-19 10:55:14,017 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) [2022-07-19 10:55:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 616 transitions. [2022-07-19 10:55:14,017 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 616 transitions. Word has length 41 [2022-07-19 10:55:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:14,018 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 616 transitions. [2022-07-19 10:55:14,018 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) [2022-07-19 10:55:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 616 transitions. [2022-07-19 10:55:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 10:55:14,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:14,019 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] [2022-07-19 10:55:14,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 10:55:14,019 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash -974540775, now seen corresponding path program 1 times [2022-07-19 10:55:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:14,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610217981] [2022-07-19 10:55:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:14,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:55:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:14,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610217981] [2022-07-19 10:55:14,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610217981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:14,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:14,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:55:14,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188703616] [2022-07-19 10:55:14,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:14,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:55:14,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:14,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:55:14,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:55:14,060 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) [2022-07-19 10:55:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:14,311 INFO L93 Difference]: Finished difference Result 789 states and 1050 transitions. [2022-07-19 10:55:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:14,311 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 [2022-07-19 10:55:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:14,313 INFO L225 Difference]: With dead ends: 789 [2022-07-19 10:55:14,313 INFO L226 Difference]: Without dead ends: 512 [2022-07-19 10:55:14,313 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 [2022-07-19 10:55:14,314 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 [2022-07-19 10:55:14,314 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] [2022-07-19 10:55:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-07-19 10:55:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 473. [2022-07-19 10:55:14,335 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) [2022-07-19 10:55:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 620 transitions. [2022-07-19 10:55:14,336 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 620 transitions. Word has length 40 [2022-07-19 10:55:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:14,336 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 620 transitions. [2022-07-19 10:55:14,336 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) [2022-07-19 10:55:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 620 transitions. [2022-07-19 10:55:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 10:55:14,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:14,337 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] [2022-07-19 10:55:14,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 10:55:14,337 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1588334311, now seen corresponding path program 1 times [2022-07-19 10:55:14,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:14,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940063084] [2022-07-19 10:55:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:55:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940063084] [2022-07-19 10:55:14,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940063084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:14,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:14,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:55:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683365836] [2022-07-19 10:55:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:14,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:55:14,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:55:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:55:14,365 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) [2022-07-19 10:55:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:14,526 INFO L93 Difference]: Finished difference Result 571 states and 746 transitions. [2022-07-19 10:55:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:55:14,526 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 [2022-07-19 10:55:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:14,528 INFO L225 Difference]: With dead ends: 571 [2022-07-19 10:55:14,528 INFO L226 Difference]: Without dead ends: 501 [2022-07-19 10:55:14,529 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 [2022-07-19 10:55:14,529 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 [2022-07-19 10:55:14,529 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] [2022-07-19 10:55:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-19 10:55:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 447. [2022-07-19 10:55:14,546 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) [2022-07-19 10:55:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 594 transitions. [2022-07-19 10:55:14,547 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 594 transitions. Word has length 40 [2022-07-19 10:55:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:14,547 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 594 transitions. [2022-07-19 10:55:14,547 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) [2022-07-19 10:55:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 594 transitions. [2022-07-19 10:55:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:55:14,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:14,548 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] [2022-07-19 10:55:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 10:55:14,549 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1541633835, now seen corresponding path program 1 times [2022-07-19 10:55:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:14,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488534008] [2022-07-19 10:55:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:14,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:55:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:14,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488534008] [2022-07-19 10:55:14,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488534008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:14,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:14,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860094088] [2022-07-19 10:55:14,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:14,595 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) [2022-07-19 10:55:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:14,867 INFO L93 Difference]: Finished difference Result 495 states and 660 transitions. [2022-07-19 10:55:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:14,867 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 [2022-07-19 10:55:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:14,869 INFO L225 Difference]: With dead ends: 495 [2022-07-19 10:55:14,869 INFO L226 Difference]: Without dead ends: 491 [2022-07-19 10:55:14,869 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 [2022-07-19 10:55:14,870 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 [2022-07-19 10:55:14,870 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] [2022-07-19 10:55:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-19 10:55:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 462. [2022-07-19 10:55:14,894 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) [2022-07-19 10:55:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 616 transitions. [2022-07-19 10:55:14,895 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 616 transitions. Word has length 41 [2022-07-19 10:55:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:14,895 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 616 transitions. [2022-07-19 10:55:14,895 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) [2022-07-19 10:55:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 616 transitions. [2022-07-19 10:55:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:55:14,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:14,896 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] [2022-07-19 10:55:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 10:55:14,897 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1541357005, now seen corresponding path program 1 times [2022-07-19 10:55:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118542915] [2022-07-19 10:55:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:55:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:14,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:14,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118542915] [2022-07-19 10:55:14,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118542915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:14,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:14,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112572927] [2022-07-19 10:55:14,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:14,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:14,939 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) [2022-07-19 10:55:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:15,234 INFO L93 Difference]: Finished difference Result 482 states and 637 transitions. [2022-07-19 10:55:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:15,235 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 [2022-07-19 10:55:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:15,236 INFO L225 Difference]: With dead ends: 482 [2022-07-19 10:55:15,237 INFO L226 Difference]: Without dead ends: 469 [2022-07-19 10:55:15,237 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 [2022-07-19 10:55:15,237 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:15,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1895 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:55:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-19 10:55:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 459. [2022-07-19 10:55:15,255 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) [2022-07-19 10:55:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 612 transitions. [2022-07-19 10:55:15,256 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 612 transitions. Word has length 41 [2022-07-19 10:55:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:15,256 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 612 transitions. [2022-07-19 10:55:15,257 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) [2022-07-19 10:55:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 612 transitions. [2022-07-19 10:55:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:55:15,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:15,258 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] [2022-07-19 10:55:15,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 10:55:15,258 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash -681787036, now seen corresponding path program 1 times [2022-07-19 10:55:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:15,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926060935] [2022-07-19 10:55:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:15,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:15,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:55:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:15,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926060935] [2022-07-19 10:55:15,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926060935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:15,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:15,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:55:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913998648] [2022-07-19 10:55:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:15,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:55:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:55:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:55:15,297 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) [2022-07-19 10:55:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:15,605 INFO L93 Difference]: Finished difference Result 519 states and 686 transitions. [2022-07-19 10:55:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:15,606 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 [2022-07-19 10:55:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:15,607 INFO L225 Difference]: With dead ends: 519 [2022-07-19 10:55:15,607 INFO L226 Difference]: Without dead ends: 503 [2022-07-19 10:55:15,608 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 [2022-07-19 10:55:15,608 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 [2022-07-19 10:55:15,608 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] [2022-07-19 10:55:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-07-19 10:55:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 445. [2022-07-19 10:55:15,627 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) [2022-07-19 10:55:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 590 transitions. [2022-07-19 10:55:15,628 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 590 transitions. Word has length 42 [2022-07-19 10:55:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:15,628 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 590 transitions. [2022-07-19 10:55:15,628 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) [2022-07-19 10:55:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 590 transitions. [2022-07-19 10:55:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 10:55:15,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:15,629 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] [2022-07-19 10:55:15,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 10:55:15,630 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1773882886, now seen corresponding path program 1 times [2022-07-19 10:55:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:15,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029193566] [2022-07-19 10:55:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:15,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:15,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:15,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029193566] [2022-07-19 10:55:15,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029193566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:15,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:15,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:15,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596745208] [2022-07-19 10:55:15,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:15,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:15,699 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) [2022-07-19 10:55:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:15,909 INFO L93 Difference]: Finished difference Result 645 states and 860 transitions. [2022-07-19 10:55:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:55:15,910 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 [2022-07-19 10:55:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:15,911 INFO L225 Difference]: With dead ends: 645 [2022-07-19 10:55:15,911 INFO L226 Difference]: Without dead ends: 405 [2022-07-19 10:55:15,912 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 [2022-07-19 10:55:15,913 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 [2022-07-19 10:55:15,913 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] [2022-07-19 10:55:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-19 10:55:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 399. [2022-07-19 10:55:15,931 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) [2022-07-19 10:55:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 524 transitions. [2022-07-19 10:55:15,932 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 524 transitions. Word has length 44 [2022-07-19 10:55:15,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:15,932 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 524 transitions. [2022-07-19 10:55:15,932 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) [2022-07-19 10:55:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 524 transitions. [2022-07-19 10:55:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:55:15,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:15,933 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] [2022-07-19 10:55:15,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 10:55:15,933 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash -126970977, now seen corresponding path program 1 times [2022-07-19 10:55:15,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:15,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368522046] [2022-07-19 10:55:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:15,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:15,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:15,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:15,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368522046] [2022-07-19 10:55:15,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368522046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:15,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:15,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:55:15,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426558950] [2022-07-19 10:55:15,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:55:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:55:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:55:15,977 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) [2022-07-19 10:55:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:16,227 INFO L93 Difference]: Finished difference Result 599 states and 789 transitions. [2022-07-19 10:55:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:16,227 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 [2022-07-19 10:55:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:16,228 INFO L225 Difference]: With dead ends: 599 [2022-07-19 10:55:16,228 INFO L226 Difference]: Without dead ends: 405 [2022-07-19 10:55:16,229 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 [2022-07-19 10:55:16,229 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 390 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-19 10:55:16,230 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] [2022-07-19 10:55:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-19 10:55:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 399. [2022-07-19 10:55:16,248 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) [2022-07-19 10:55:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 522 transitions. [2022-07-19 10:55:16,248 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 522 transitions. Word has length 46 [2022-07-19 10:55:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:16,249 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 522 transitions. [2022-07-19 10:55:16,249 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) [2022-07-19 10:55:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 522 transitions. [2022-07-19 10:55:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:55:16,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:16,250 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] [2022-07-19 10:55:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 10:55:16,250 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:16,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1699061038, now seen corresponding path program 1 times [2022-07-19 10:55:16,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:16,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487918707] [2022-07-19 10:55:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:16,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:16,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:55:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487918707] [2022-07-19 10:55:16,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487918707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:16,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:16,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61417011] [2022-07-19 10:55:16,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:16,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:16,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:16,287 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) [2022-07-19 10:55:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:16,565 INFO L93 Difference]: Finished difference Result 417 states and 540 transitions. [2022-07-19 10:55:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:16,565 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 [2022-07-19 10:55:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:16,566 INFO L225 Difference]: With dead ends: 417 [2022-07-19 10:55:16,566 INFO L226 Difference]: Without dead ends: 401 [2022-07-19 10:55:16,567 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 [2022-07-19 10:55:16,567 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 [2022-07-19 10:55:16,567 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] [2022-07-19 10:55:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-07-19 10:55:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 395. [2022-07-19 10:55:16,588 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) [2022-07-19 10:55:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 516 transitions. [2022-07-19 10:55:16,589 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 516 transitions. Word has length 46 [2022-07-19 10:55:16,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:16,589 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 516 transitions. [2022-07-19 10:55:16,589 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) [2022-07-19 10:55:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 516 transitions. [2022-07-19 10:55:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:55:16,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:16,590 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] [2022-07-19 10:55:16,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-19 10:55:16,590 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1875666142, now seen corresponding path program 1 times [2022-07-19 10:55:16,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:16,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634775536] [2022-07-19 10:55:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:16,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:16,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:16,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:55:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:16,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:16,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634775536] [2022-07-19 10:55:16,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634775536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:16,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:16,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778335411] [2022-07-19 10:55:16,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:16,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:16,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:16,628 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) [2022-07-19 10:55:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:16,933 INFO L93 Difference]: Finished difference Result 418 states and 540 transitions. [2022-07-19 10:55:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:16,934 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 [2022-07-19 10:55:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:16,935 INFO L225 Difference]: With dead ends: 418 [2022-07-19 10:55:16,935 INFO L226 Difference]: Without dead ends: 396 [2022-07-19 10:55:16,936 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 [2022-07-19 10:55:16,936 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 [2022-07-19 10:55:16,936 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] [2022-07-19 10:55:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-19 10:55:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 390. [2022-07-19 10:55:16,956 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) [2022-07-19 10:55:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2022-07-19 10:55:16,957 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 48 [2022-07-19 10:55:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:16,957 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2022-07-19 10:55:16,958 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) [2022-07-19 10:55:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2022-07-19 10:55:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:55:16,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:16,958 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] [2022-07-19 10:55:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-19 10:55:16,959 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash 712165053, now seen corresponding path program 1 times [2022-07-19 10:55:16,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:16,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107137964] [2022-07-19 10:55:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:16,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:16,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107137964] [2022-07-19 10:55:16,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107137964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:16,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:16,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:55:16,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411275288] [2022-07-19 10:55:16,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:16,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:55:16,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:55:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:55:16,990 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) [2022-07-19 10:55:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:17,136 INFO L93 Difference]: Finished difference Result 663 states and 861 transitions. [2022-07-19 10:55:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:55:17,137 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 [2022-07-19 10:55:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:17,138 INFO L225 Difference]: With dead ends: 663 [2022-07-19 10:55:17,138 INFO L226 Difference]: Without dead ends: 475 [2022-07-19 10:55:17,139 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 [2022-07-19 10:55:17,139 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 [2022-07-19 10:55:17,139 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] [2022-07-19 10:55:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-19 10:55:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 443. [2022-07-19 10:55:17,177 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) [2022-07-19 10:55:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 579 transitions. [2022-07-19 10:55:17,178 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 579 transitions. Word has length 49 [2022-07-19 10:55:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:17,178 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 579 transitions. [2022-07-19 10:55:17,178 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) [2022-07-19 10:55:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 579 transitions. [2022-07-19 10:55:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:55:17,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:17,179 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] [2022-07-19 10:55:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 10:55:17,180 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1620758026, now seen corresponding path program 1 times [2022-07-19 10:55:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186375848] [2022-07-19 10:55:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:17,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186375848] [2022-07-19 10:55:17,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186375848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:17,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:17,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:55:17,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147671772] [2022-07-19 10:55:17,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:17,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:55:17,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:17,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:55:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:55:17,215 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) [2022-07-19 10:55:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:17,378 INFO L93 Difference]: Finished difference Result 528 states and 679 transitions. [2022-07-19 10:55:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:55:17,379 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 [2022-07-19 10:55:17,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:17,380 INFO L225 Difference]: With dead ends: 528 [2022-07-19 10:55:17,380 INFO L226 Difference]: Without dead ends: 456 [2022-07-19 10:55:17,381 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 [2022-07-19 10:55:17,381 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 [2022-07-19 10:55:17,382 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] [2022-07-19 10:55:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-19 10:55:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 445. [2022-07-19 10:55:17,404 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) [2022-07-19 10:55:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 581 transitions. [2022-07-19 10:55:17,405 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 581 transitions. Word has length 48 [2022-07-19 10:55:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:17,406 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 581 transitions. [2022-07-19 10:55:17,406 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) [2022-07-19 10:55:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 581 transitions. [2022-07-19 10:55:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:55:17,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:17,407 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] [2022-07-19 10:55:17,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 10:55:17,407 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash -979201482, now seen corresponding path program 1 times [2022-07-19 10:55:17,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:17,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104040752] [2022-07-19 10:55:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:17,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:17,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:17,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104040752] [2022-07-19 10:55:17,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104040752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:17,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:17,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:17,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423793747] [2022-07-19 10:55:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:17,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:17,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:17,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:17,451 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) [2022-07-19 10:55:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:17,707 INFO L93 Difference]: Finished difference Result 455 states and 590 transitions. [2022-07-19 10:55:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:17,708 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 [2022-07-19 10:55:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:17,709 INFO L225 Difference]: With dead ends: 455 [2022-07-19 10:55:17,709 INFO L226 Difference]: Without dead ends: 419 [2022-07-19 10:55:17,709 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 [2022-07-19 10:55:17,710 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 [2022-07-19 10:55:17,710 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] [2022-07-19 10:55:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-19 10:55:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2022-07-19 10:55:17,728 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) [2022-07-19 10:55:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 539 transitions. [2022-07-19 10:55:17,729 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 539 transitions. Word has length 48 [2022-07-19 10:55:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:17,729 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 539 transitions. [2022-07-19 10:55:17,729 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) [2022-07-19 10:55:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 539 transitions. [2022-07-19 10:55:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:55:17,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:17,730 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] [2022-07-19 10:55:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 10:55:17,731 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash -697229217, now seen corresponding path program 1 times [2022-07-19 10:55:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:17,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122756402] [2022-07-19 10:55:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:17,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:55:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122756402] [2022-07-19 10:55:17,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122756402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:17,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:17,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232325627] [2022-07-19 10:55:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:17,795 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) [2022-07-19 10:55:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:18,047 INFO L93 Difference]: Finished difference Result 667 states and 865 transitions. [2022-07-19 10:55:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:18,048 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 [2022-07-19 10:55:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:18,049 INFO L225 Difference]: With dead ends: 667 [2022-07-19 10:55:18,049 INFO L226 Difference]: Without dead ends: 446 [2022-07-19 10:55:18,050 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 [2022-07-19 10:55:18,050 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 81 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-19 10:55:18,051 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] [2022-07-19 10:55:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-19 10:55:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 417. [2022-07-19 10:55:18,077 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) [2022-07-19 10:55:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 537 transitions. [2022-07-19 10:55:18,078 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 537 transitions. Word has length 51 [2022-07-19 10:55:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:18,078 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 537 transitions. [2022-07-19 10:55:18,078 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) [2022-07-19 10:55:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 537 transitions. [2022-07-19 10:55:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:55:18,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:18,079 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] [2022-07-19 10:55:18,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-19 10:55:18,079 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1011871155, now seen corresponding path program 1 times [2022-07-19 10:55:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701925020] [2022-07-19 10:55:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 10:55:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:18,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701925020] [2022-07-19 10:55:18,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701925020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:18,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:18,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:18,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766131821] [2022-07-19 10:55:18,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:18,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:18,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:18,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:18,131 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) [2022-07-19 10:55:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:18,409 INFO L93 Difference]: Finished difference Result 438 states and 559 transitions. [2022-07-19 10:55:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:55:18,409 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 [2022-07-19 10:55:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:18,411 INFO L225 Difference]: With dead ends: 438 [2022-07-19 10:55:18,411 INFO L226 Difference]: Without dead ends: 419 [2022-07-19 10:55:18,411 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 [2022-07-19 10:55:18,412 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 [2022-07-19 10:55:18,412 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] [2022-07-19 10:55:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-19 10:55:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 413. [2022-07-19 10:55:18,430 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) [2022-07-19 10:55:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 531 transitions. [2022-07-19 10:55:18,430 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 531 transitions. Word has length 51 [2022-07-19 10:55:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:18,431 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 531 transitions. [2022-07-19 10:55:18,431 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) [2022-07-19 10:55:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 531 transitions. [2022-07-19 10:55:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:55:18,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:18,432 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] [2022-07-19 10:55:18,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-19 10:55:18,432 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1800703409, now seen corresponding path program 1 times [2022-07-19 10:55:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:18,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927643877] [2022-07-19 10:55:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:18,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:55:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:18,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:18,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927643877] [2022-07-19 10:55:18,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927643877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:18,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:18,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:18,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519724544] [2022-07-19 10:55:18,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:18,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:18,473 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) [2022-07-19 10:55:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:18,722 INFO L93 Difference]: Finished difference Result 434 states and 553 transitions. [2022-07-19 10:55:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:55:18,723 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 [2022-07-19 10:55:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:18,724 INFO L225 Difference]: With dead ends: 434 [2022-07-19 10:55:18,724 INFO L226 Difference]: Without dead ends: 414 [2022-07-19 10:55:18,725 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 [2022-07-19 10:55:18,725 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 [2022-07-19 10:55:18,725 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] [2022-07-19 10:55:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-19 10:55:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 408. [2022-07-19 10:55:18,743 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) [2022-07-19 10:55:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 524 transitions. [2022-07-19 10:55:18,744 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 524 transitions. Word has length 52 [2022-07-19 10:55:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:18,744 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 524 transitions. [2022-07-19 10:55:18,744 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) [2022-07-19 10:55:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 524 transitions. [2022-07-19 10:55:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:55:18,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:18,747 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] [2022-07-19 10:55:18,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-19 10:55:18,747 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:18,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1557824811, now seen corresponding path program 1 times [2022-07-19 10:55:18,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:18,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299214701] [2022-07-19 10:55:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:18,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:55:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:18,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299214701] [2022-07-19 10:55:18,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299214701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:18,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:18,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:18,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658989796] [2022-07-19 10:55:18,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:18,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:18,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:18,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:18,798 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) [2022-07-19 10:55:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:19,047 INFO L93 Difference]: Finished difference Result 429 states and 546 transitions. [2022-07-19 10:55:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:55:19,047 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 [2022-07-19 10:55:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:19,048 INFO L225 Difference]: With dead ends: 429 [2022-07-19 10:55:19,048 INFO L226 Difference]: Without dead ends: 410 [2022-07-19 10:55:19,049 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 [2022-07-19 10:55:19,049 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 [2022-07-19 10:55:19,049 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] [2022-07-19 10:55:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-19 10:55:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 404. [2022-07-19 10:55:19,066 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) [2022-07-19 10:55:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 518 transitions. [2022-07-19 10:55:19,067 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 518 transitions. Word has length 52 [2022-07-19 10:55:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:19,067 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 518 transitions. [2022-07-19 10:55:19,076 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) [2022-07-19 10:55:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 518 transitions. [2022-07-19 10:55:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:55:19,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:19,077 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] [2022-07-19 10:55:19,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 10:55:19,077 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:19,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1863063646, now seen corresponding path program 1 times [2022-07-19 10:55:19,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:19,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617452767] [2022-07-19 10:55:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 10:55:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:19,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617452767] [2022-07-19 10:55:19,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617452767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:19,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:19,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515181893] [2022-07-19 10:55:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:19,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:19,117 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) [2022-07-19 10:55:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:19,335 INFO L93 Difference]: Finished difference Result 421 states and 535 transitions. [2022-07-19 10:55:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:19,336 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 [2022-07-19 10:55:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:19,337 INFO L225 Difference]: With dead ends: 421 [2022-07-19 10:55:19,337 INFO L226 Difference]: Without dead ends: 388 [2022-07-19 10:55:19,337 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 [2022-07-19 10:55:19,338 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 72 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-19 10:55:19,338 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] [2022-07-19 10:55:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-19 10:55:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 382. [2022-07-19 10:55:19,354 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) [2022-07-19 10:55:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 491 transitions. [2022-07-19 10:55:19,355 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 491 transitions. Word has length 52 [2022-07-19 10:55:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:19,355 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 491 transitions. [2022-07-19 10:55:19,355 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) [2022-07-19 10:55:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 491 transitions. [2022-07-19 10:55:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:55:19,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:19,356 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] [2022-07-19 10:55:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-19 10:55:19,356 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1043047530, now seen corresponding path program 1 times [2022-07-19 10:55:19,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:19,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922591907] [2022-07-19 10:55:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:19,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922591907] [2022-07-19 10:55:19,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922591907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:19,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:19,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:19,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297267569] [2022-07-19 10:55:19,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:19,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:19,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:19,405 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) [2022-07-19 10:55:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:19,567 INFO L93 Difference]: Finished difference Result 724 states and 945 transitions. [2022-07-19 10:55:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:19,567 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 [2022-07-19 10:55:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:19,570 INFO L225 Difference]: With dead ends: 724 [2022-07-19 10:55:19,570 INFO L226 Difference]: Without dead ends: 514 [2022-07-19 10:55:19,571 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 [2022-07-19 10:55:19,571 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:19,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1639 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:55:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-07-19 10:55:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 382. [2022-07-19 10:55:19,596 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) [2022-07-19 10:55:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 490 transitions. [2022-07-19 10:55:19,597 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 490 transitions. Word has length 54 [2022-07-19 10:55:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:19,597 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 490 transitions. [2022-07-19 10:55:19,597 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) [2022-07-19 10:55:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 490 transitions. [2022-07-19 10:55:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 10:55:19,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:19,600 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] [2022-07-19 10:55:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-19 10:55:19,600 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 843934500, now seen corresponding path program 1 times [2022-07-19 10:55:19,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:19,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156028380] [2022-07-19 10:55:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:55:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:19,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156028380] [2022-07-19 10:55:19,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156028380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:19,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:19,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:19,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744077662] [2022-07-19 10:55:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:19,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:19,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:19,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:19,650 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) [2022-07-19 10:55:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:19,906 INFO L93 Difference]: Finished difference Result 403 states and 512 transitions. [2022-07-19 10:55:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:55:19,906 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 [2022-07-19 10:55:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:19,908 INFO L225 Difference]: With dead ends: 403 [2022-07-19 10:55:19,911 INFO L226 Difference]: Without dead ends: 366 [2022-07-19 10:55:19,911 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 [2022-07-19 10:55:19,918 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 [2022-07-19 10:55:19,918 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] [2022-07-19 10:55:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-07-19 10:55:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 360. [2022-07-19 10:55:19,935 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) [2022-07-19 10:55:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 462 transitions. [2022-07-19 10:55:19,935 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 462 transitions. Word has length 56 [2022-07-19 10:55:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:19,937 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 462 transitions. [2022-07-19 10:55:19,937 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) [2022-07-19 10:55:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 462 transitions. [2022-07-19 10:55:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 10:55:19,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:19,938 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] [2022-07-19 10:55:19,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-19 10:55:19,938 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1757413827, now seen corresponding path program 1 times [2022-07-19 10:55:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:19,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320275501] [2022-07-19 10:55:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:19,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:55:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:19,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:19,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320275501] [2022-07-19 10:55:19,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320275501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:19,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:19,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:19,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691606535] [2022-07-19 10:55:19,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:19,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:19,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:19,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:19,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:19,989 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) [2022-07-19 10:55:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:20,171 INFO L93 Difference]: Finished difference Result 572 states and 729 transitions. [2022-07-19 10:55:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:20,172 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 [2022-07-19 10:55:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:20,173 INFO L225 Difference]: With dead ends: 572 [2022-07-19 10:55:20,173 INFO L226 Difference]: Without dead ends: 341 [2022-07-19 10:55:20,173 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 [2022-07-19 10:55:20,174 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 [2022-07-19 10:55:20,174 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] [2022-07-19 10:55:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-19 10:55:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2022-07-19 10:55:20,189 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) [2022-07-19 10:55:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 412 transitions. [2022-07-19 10:55:20,190 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 412 transitions. Word has length 62 [2022-07-19 10:55:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:20,190 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 412 transitions. [2022-07-19 10:55:20,190 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) [2022-07-19 10:55:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 412 transitions. [2022-07-19 10:55:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 10:55:20,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:20,191 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] [2022-07-19 10:55:20,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-19 10:55:20,192 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash 282061023, now seen corresponding path program 1 times [2022-07-19 10:55:20,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828169385] [2022-07-19 10:55:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:20,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:55:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:20,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:20,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828169385] [2022-07-19 10:55:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828169385] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:20,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:20,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:55:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826404752] [2022-07-19 10:55:20,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:20,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:55:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:55:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:55:20,253 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) [2022-07-19 10:55:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:20,526 INFO L93 Difference]: Finished difference Result 374 states and 469 transitions. [2022-07-19 10:55:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:55:20,527 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 [2022-07-19 10:55:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:20,528 INFO L225 Difference]: With dead ends: 374 [2022-07-19 10:55:20,528 INFO L226 Difference]: Without dead ends: 355 [2022-07-19 10:55:20,528 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 [2022-07-19 10:55:20,529 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 [2022-07-19 10:55:20,529 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] [2022-07-19 10:55:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-19 10:55:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 335. [2022-07-19 10:55:20,556 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) [2022-07-19 10:55:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 422 transitions. [2022-07-19 10:55:20,557 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 422 transitions. Word has length 66 [2022-07-19 10:55:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:20,557 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 422 transitions. [2022-07-19 10:55:20,557 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) [2022-07-19 10:55:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 422 transitions. [2022-07-19 10:55:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 10:55:20,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:20,558 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] [2022-07-19 10:55:20,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-19 10:55:20,559 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:20,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1597986012, now seen corresponding path program 1 times [2022-07-19 10:55:20,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:20,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499873319] [2022-07-19 10:55:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:20,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:20,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:20,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:55:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 10:55:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:20,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499873319] [2022-07-19 10:55:20,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499873319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:20,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:20,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:55:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489868482] [2022-07-19 10:55:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:20,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:55:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:55:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:55:20,604 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) [2022-07-19 10:55:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:20,979 INFO L93 Difference]: Finished difference Result 698 states and 856 transitions. [2022-07-19 10:55:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:20,979 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 [2022-07-19 10:55:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:20,981 INFO L225 Difference]: With dead ends: 698 [2022-07-19 10:55:20,981 INFO L226 Difference]: Without dead ends: 454 [2022-07-19 10:55:20,981 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 [2022-07-19 10:55:20,982 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:20,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1052 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:55:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-19 10:55:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 429. [2022-07-19 10:55:21,003 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) [2022-07-19 10:55:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 527 transitions. [2022-07-19 10:55:21,004 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 527 transitions. Word has length 68 [2022-07-19 10:55:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:21,004 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 527 transitions. [2022-07-19 10:55:21,004 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) [2022-07-19 10:55:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 527 transitions. [2022-07-19 10:55:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 10:55:21,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:21,005 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] [2022-07-19 10:55:21,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-19 10:55:21,005 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2100257904, now seen corresponding path program 1 times [2022-07-19 10:55:21,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:21,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594970411] [2022-07-19 10:55:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:55:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 10:55:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:21,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:21,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594970411] [2022-07-19 10:55:21,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594970411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:21,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:21,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:55:21,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399239427] [2022-07-19 10:55:21,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:21,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:55:21,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:21,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:55:21,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:55:21,063 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) [2022-07-19 10:55:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:21,312 INFO L93 Difference]: Finished difference Result 462 states and 562 transitions. [2022-07-19 10:55:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:55:21,312 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 [2022-07-19 10:55:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:21,313 INFO L225 Difference]: With dead ends: 462 [2022-07-19 10:55:21,313 INFO L226 Difference]: Without dead ends: 443 [2022-07-19 10:55:21,314 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 [2022-07-19 10:55:21,314 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 [2022-07-19 10:55:21,314 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] [2022-07-19 10:55:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-19 10:55:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 421. [2022-07-19 10:55:21,335 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) [2022-07-19 10:55:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 517 transitions. [2022-07-19 10:55:21,336 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 517 transitions. Word has length 67 [2022-07-19 10:55:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:21,336 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 517 transitions. [2022-07-19 10:55:21,336 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) [2022-07-19 10:55:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 517 transitions. [2022-07-19 10:55:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 10:55:21,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:21,337 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] [2022-07-19 10:55:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-19 10:55:21,337 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1162614473, now seen corresponding path program 1 times [2022-07-19 10:55:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:21,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304169110] [2022-07-19 10:55:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:55:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:55:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 10:55:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:21,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:21,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304169110] [2022-07-19 10:55:21,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304169110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:21,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:21,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:55:21,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448747426] [2022-07-19 10:55:21,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:21,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:55:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:55:21,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:55:21,398 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) [2022-07-19 10:55:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:21,782 INFO L93 Difference]: Finished difference Result 423 states and 518 transitions. [2022-07-19 10:55:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:55:21,783 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 [2022-07-19 10:55:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:21,784 INFO L225 Difference]: With dead ends: 423 [2022-07-19 10:55:21,784 INFO L226 Difference]: Without dead ends: 346 [2022-07-19 10:55:21,785 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 [2022-07-19 10:55:21,785 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 [2022-07-19 10:55:21,785 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] [2022-07-19 10:55:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-07-19 10:55:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-07-19 10:55:21,832 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) [2022-07-19 10:55:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 427 transitions. [2022-07-19 10:55:21,833 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 427 transitions. Word has length 69 [2022-07-19 10:55:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:21,833 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 427 transitions. [2022-07-19 10:55:21,833 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) [2022-07-19 10:55:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 427 transitions. [2022-07-19 10:55:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 10:55:21,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:21,835 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] [2022-07-19 10:55:21,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-19 10:55:21,835 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2112644440, now seen corresponding path program 1 times [2022-07-19 10:55:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:21,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854590368] [2022-07-19 10:55:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:21,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 10:55:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:21,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:21,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854590368] [2022-07-19 10:55:21,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854590368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:21,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:21,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:21,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754800345] [2022-07-19 10:55:21,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:21,884 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) [2022-07-19 10:55:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:22,028 INFO L93 Difference]: Finished difference Result 504 states and 620 transitions. [2022-07-19 10:55:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:55:22,028 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 [2022-07-19 10:55:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:22,030 INFO L225 Difference]: With dead ends: 504 [2022-07-19 10:55:22,030 INFO L226 Difference]: Without dead ends: 373 [2022-07-19 10:55:22,030 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 [2022-07-19 10:55:22,031 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 [2022-07-19 10:55:22,031 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] [2022-07-19 10:55:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-19 10:55:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 357. [2022-07-19 10:55:22,049 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) [2022-07-19 10:55:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 433 transitions. [2022-07-19 10:55:22,050 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 433 transitions. Word has length 71 [2022-07-19 10:55:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:22,050 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 433 transitions. [2022-07-19 10:55:22,050 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) [2022-07-19 10:55:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 433 transitions. [2022-07-19 10:55:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 10:55:22,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:22,051 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] [2022-07-19 10:55:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-19 10:55:22,052 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1723775457, now seen corresponding path program 1 times [2022-07-19 10:55:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467585438] [2022-07-19 10:55:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 10:55:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467585438] [2022-07-19 10:55:22,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467585438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:22,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:22,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:55:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809472938] [2022-07-19 10:55:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:22,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:55:22,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:55:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:55:22,098 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) [2022-07-19 10:55:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:22,219 INFO L93 Difference]: Finished difference Result 456 states and 556 transitions. [2022-07-19 10:55:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:55:22,219 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 [2022-07-19 10:55:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:22,226 INFO L225 Difference]: With dead ends: 456 [2022-07-19 10:55:22,226 INFO L226 Difference]: Without dead ends: 392 [2022-07-19 10:55:22,226 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 [2022-07-19 10:55:22,226 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 [2022-07-19 10:55:22,227 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] [2022-07-19 10:55:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-19 10:55:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 265. [2022-07-19 10:55:22,242 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) [2022-07-19 10:55:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 311 transitions. [2022-07-19 10:55:22,242 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 311 transitions. Word has length 74 [2022-07-19 10:55:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:22,243 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 311 transitions. [2022-07-19 10:55:22,243 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) [2022-07-19 10:55:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 311 transitions. [2022-07-19 10:55:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 10:55:22,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:22,244 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] [2022-07-19 10:55:22,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-19 10:55:22,244 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:22,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1573659208, now seen corresponding path program 1 times [2022-07-19 10:55:22,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:22,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603557670] [2022-07-19 10:55:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:22,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:55:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 10:55:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:22,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603557670] [2022-07-19 10:55:22,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603557670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:22,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:22,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:22,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864648316] [2022-07-19 10:55:22,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:22,314 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) [2022-07-19 10:55:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:22,529 INFO L93 Difference]: Finished difference Result 497 states and 582 transitions. [2022-07-19 10:55:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:55:22,530 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 [2022-07-19 10:55:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:22,532 INFO L225 Difference]: With dead ends: 497 [2022-07-19 10:55:22,532 INFO L226 Difference]: Without dead ends: 444 [2022-07-19 10:55:22,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:55:22,534 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 370 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-19 10:55:22,534 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] [2022-07-19 10:55:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-19 10:55:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 191. [2022-07-19 10:55:22,563 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) [2022-07-19 10:55:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 217 transitions. [2022-07-19 10:55:22,563 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 217 transitions. Word has length 77 [2022-07-19 10:55:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:22,564 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 217 transitions. [2022-07-19 10:55:22,564 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) [2022-07-19 10:55:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 217 transitions. [2022-07-19 10:55:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 10:55:22,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:22,565 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] [2022-07-19 10:55:22,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-19 10:55:22,565 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1441970232, now seen corresponding path program 1 times [2022-07-19 10:55:22,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:22,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158389151] [2022-07-19 10:55:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:22,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 10:55:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:55:22,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:22,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158389151] [2022-07-19 10:55:22,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158389151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:22,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:22,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:55:22,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425391688] [2022-07-19 10:55:22,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:22,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:55:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:55:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:55:22,624 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) [2022-07-19 10:55:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:22,674 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2022-07-19 10:55:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:22,675 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 [2022-07-19 10:55:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:22,675 INFO L225 Difference]: With dead ends: 256 [2022-07-19 10:55:22,675 INFO L226 Difference]: Without dead ends: 197 [2022-07-19 10:55:22,676 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 [2022-07-19 10:55:22,677 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 [2022-07-19 10:55:22,679 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] [2022-07-19 10:55:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-19 10:55:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2022-07-19 10:55:22,696 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) [2022-07-19 10:55:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-07-19 10:55:22,697 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 83 [2022-07-19 10:55:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:22,697 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-07-19 10:55:22,697 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) [2022-07-19 10:55:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-07-19 10:55:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:55:22,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:22,699 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] [2022-07-19 10:55:22,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-19 10:55:22,699 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1573344441, now seen corresponding path program 1 times [2022-07-19 10:55:22,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:22,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577853557] [2022-07-19 10:55:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:22,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-19 10:55:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 10:55:22,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577853557] [2022-07-19 10:55:22,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577853557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:22,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:22,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:55:22,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646952970] [2022-07-19 10:55:22,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:22,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:55:22,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:55:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:55:22,740 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) [2022-07-19 10:55:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:22,804 INFO L93 Difference]: Finished difference Result 247 states and 277 transitions. [2022-07-19 10:55:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:22,804 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 [2022-07-19 10:55:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:22,805 INFO L225 Difference]: With dead ends: 247 [2022-07-19 10:55:22,805 INFO L226 Difference]: Without dead ends: 221 [2022-07-19 10:55:22,806 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 [2022-07-19 10:55:22,806 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:22,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 572 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:55:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-19 10:55:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2022-07-19 10:55:22,822 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) [2022-07-19 10:55:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2022-07-19 10:55:22,823 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 103 [2022-07-19 10:55:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:22,823 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2022-07-19 10:55:22,823 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) [2022-07-19 10:55:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2022-07-19 10:55:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:55:22,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:22,825 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] [2022-07-19 10:55:22,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-19 10:55:22,825 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:22,825 INFO L85 PathProgramCache]: Analyzing trace with hash -696614137, now seen corresponding path program 1 times [2022-07-19 10:55:22,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:22,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995551579] [2022-07-19 10:55:22,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:22,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-19 10:55:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 10:55:22,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:22,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995551579] [2022-07-19 10:55:22,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995551579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:22,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:22,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:55:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984505190] [2022-07-19 10:55:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:22,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:55:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:55:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:55:22,905 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) [2022-07-19 10:55:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:23,053 INFO L93 Difference]: Finished difference Result 233 states and 264 transitions. [2022-07-19 10:55:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:55:23,053 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 [2022-07-19 10:55:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:23,054 INFO L225 Difference]: With dead ends: 233 [2022-07-19 10:55:23,054 INFO L226 Difference]: Without dead ends: 197 [2022-07-19 10:55:23,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:55:23,054 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 [2022-07-19 10:55:23,054 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] [2022-07-19 10:55:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-19 10:55:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2022-07-19 10:55:23,066 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) [2022-07-19 10:55:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2022-07-19 10:55:23,066 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 103 [2022-07-19 10:55:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:23,066 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2022-07-19 10:55:23,066 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) [2022-07-19 10:55:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2022-07-19 10:55:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 10:55:23,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:23,067 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] [2022-07-19 10:55:23,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-19 10:55:23,067 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 561522837, now seen corresponding path program 1 times [2022-07-19 10:55:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655549505] [2022-07-19 10:55:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:23,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-19 10:55:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 10:55:23,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655549505] [2022-07-19 10:55:23,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655549505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:23,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:23,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:55:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91745003] [2022-07-19 10:55:23,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:55:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:55:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:55:23,187 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) [2022-07-19 10:55:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:23,499 INFO L93 Difference]: Finished difference Result 299 states and 343 transitions. [2022-07-19 10:55:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 10:55:23,500 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 [2022-07-19 10:55:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:23,501 INFO L225 Difference]: With dead ends: 299 [2022-07-19 10:55:23,501 INFO L226 Difference]: Without dead ends: 265 [2022-07-19 10:55:23,501 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 [2022-07-19 10:55:23,501 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 [2022-07-19 10:55:23,501 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] [2022-07-19 10:55:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-19 10:55:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 206. [2022-07-19 10:55:23,518 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) [2022-07-19 10:55:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 232 transitions. [2022-07-19 10:55:23,519 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 232 transitions. Word has length 104 [2022-07-19 10:55:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:23,519 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 232 transitions. [2022-07-19 10:55:23,519 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) [2022-07-19 10:55:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 232 transitions. [2022-07-19 10:55:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-19 10:55:23,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:23,520 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] [2022-07-19 10:55:23,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-19 10:55:23,521 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1183080786, now seen corresponding path program 1 times [2022-07-19 10:55:23,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:23,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304385483] [2022-07-19 10:55:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 10:55:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 10:55:23,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:23,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304385483] [2022-07-19 10:55:23,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304385483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:23,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:23,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:55:23,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789933062] [2022-07-19 10:55:23,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:23,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:55:23,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:55:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:55:23,631 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) [2022-07-19 10:55:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:23,820 INFO L93 Difference]: Finished difference Result 280 states and 318 transitions. [2022-07-19 10:55:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:55:23,820 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 [2022-07-19 10:55:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:23,821 INFO L225 Difference]: With dead ends: 280 [2022-07-19 10:55:23,821 INFO L226 Difference]: Without dead ends: 220 [2022-07-19 10:55:23,821 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 [2022-07-19 10:55:23,822 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:23,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1674 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:55:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-19 10:55:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 206. [2022-07-19 10:55:23,838 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) [2022-07-19 10:55:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 231 transitions. [2022-07-19 10:55:23,838 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 231 transitions. Word has length 105 [2022-07-19 10:55:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:23,839 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 231 transitions. [2022-07-19 10:55:23,839 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) [2022-07-19 10:55:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 231 transitions. [2022-07-19 10:55:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-19 10:55:23,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:23,840 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] [2022-07-19 10:55:23,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-19 10:55:23,840 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1392028993, now seen corresponding path program 1 times [2022-07-19 10:55:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885322046] [2022-07-19 10:55:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 10:55:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 10:55:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:23,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885322046] [2022-07-19 10:55:23,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885322046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:23,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:23,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:55:23,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566236293] [2022-07-19 10:55:23,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:23,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:55:23,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:55:23,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:55:23,904 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) [2022-07-19 10:55:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:23,985 INFO L93 Difference]: Finished difference Result 258 states and 288 transitions. [2022-07-19 10:55:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:55:23,985 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 [2022-07-19 10:55:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:23,986 INFO L225 Difference]: With dead ends: 258 [2022-07-19 10:55:23,986 INFO L226 Difference]: Without dead ends: 198 [2022-07-19 10:55:23,986 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 [2022-07-19 10:55:23,987 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:23,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 384 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:55:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-19 10:55:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 184. [2022-07-19 10:55:24,000 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) [2022-07-19 10:55:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2022-07-19 10:55:24,001 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 108 [2022-07-19 10:55:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:24,001 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2022-07-19 10:55:24,001 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) [2022-07-19 10:55:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2022-07-19 10:55:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-19 10:55:24,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:24,002 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] [2022-07-19 10:55:24,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-19 10:55:24,002 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:24,003 INFO L85 PathProgramCache]: Analyzing trace with hash 171236406, now seen corresponding path program 1 times [2022-07-19 10:55:24,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:24,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385841166] [2022-07-19 10:55:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:24,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 10:55:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-19 10:55:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 10:55:24,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:24,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385841166] [2022-07-19 10:55:24,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385841166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:24,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:24,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:24,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731860294] [2022-07-19 10:55:24,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:24,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:24,065 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) [2022-07-19 10:55:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:24,156 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2022-07-19 10:55:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:55:24,156 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 [2022-07-19 10:55:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:24,157 INFO L225 Difference]: With dead ends: 238 [2022-07-19 10:55:24,157 INFO L226 Difference]: Without dead ends: 163 [2022-07-19 10:55:24,157 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 [2022-07-19 10:55:24,158 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 [2022-07-19 10:55:24,158 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] [2022-07-19 10:55:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-19 10:55:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-19 10:55:24,169 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) [2022-07-19 10:55:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 178 transitions. [2022-07-19 10:55:24,170 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 178 transitions. Word has length 114 [2022-07-19 10:55:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:24,170 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 178 transitions. [2022-07-19 10:55:24,170 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) [2022-07-19 10:55:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 178 transitions. [2022-07-19 10:55:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-19 10:55:24,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:24,171 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] [2022-07-19 10:55:24,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-19 10:55:24,171 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2140745716, now seen corresponding path program 1 times [2022-07-19 10:55:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:24,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506680323] [2022-07-19 10:55:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:24,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 10:55:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-19 10:55:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 10:55:24,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506680323] [2022-07-19 10:55:24,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506680323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:24,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:24,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:55:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817731920] [2022-07-19 10:55:24,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:24,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:55:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:55:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:55:24,231 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) [2022-07-19 10:55:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:24,391 INFO L93 Difference]: Finished difference Result 334 states and 366 transitions. [2022-07-19 10:55:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:55:24,392 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 [2022-07-19 10:55:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:24,392 INFO L225 Difference]: With dead ends: 334 [2022-07-19 10:55:24,393 INFO L226 Difference]: Without dead ends: 163 [2022-07-19 10:55:24,393 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 [2022-07-19 10:55:24,393 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 [2022-07-19 10:55:24,393 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] [2022-07-19 10:55:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-19 10:55:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-19 10:55:24,404 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) [2022-07-19 10:55:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 177 transitions. [2022-07-19 10:55:24,405 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 177 transitions. Word has length 115 [2022-07-19 10:55:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:24,405 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 177 transitions. [2022-07-19 10:55:24,405 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) [2022-07-19 10:55:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 177 transitions. [2022-07-19 10:55:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-19 10:55:24,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:55:24,406 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] [2022-07-19 10:55:24,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-19 10:55:24,406 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:55:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:55:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash 493382774, now seen corresponding path program 1 times [2022-07-19 10:55:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:55:24,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113998380] [2022-07-19 10:55:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:55:24,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:55:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:55:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 10:55:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 10:55:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-19 10:55:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:55:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 10:55:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:55:24,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113998380] [2022-07-19 10:55:24,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113998380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:55:24,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:55:24,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 10:55:24,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007276216] [2022-07-19 10:55:24,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:55:24,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 10:55:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:55:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 10:55:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:55:24,499 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) [2022-07-19 10:55:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:55:24,733 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2022-07-19 10:55:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:55:24,733 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 [2022-07-19 10:55:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:55:24,734 INFO L225 Difference]: With dead ends: 176 [2022-07-19 10:55:24,734 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 10:55:24,734 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 [2022-07-19 10:55:24,734 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:55:24,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 743 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:55:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 10:55:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 10:55:24,735 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) [2022-07-19 10:55:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 10:55:24,735 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2022-07-19 10:55:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:55:24,736 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 10:55:24,736 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) [2022-07-19 10:55:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 10:55:24,736 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 10:55:24,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 10:55:24,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-19 10:55:24,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.