./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/kbfiltr.i.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 791fd4c1f54f973c646b3f11f7eb2f654eca269cacf7e504443ee0d13fbe9694 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:11:06,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:11:06,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:11:06,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:11:06,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:11:06,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:11:06,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:11:06,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:11:06,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:11:06,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:11:06,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:11:06,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:11:06,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:11:06,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:11:06,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:11:06,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:11:06,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:11:06,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:11:06,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:11:06,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:11:06,536 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:11:06,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:11:06,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:11:06,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:11:06,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:11:06,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:11:06,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:11:06,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:11:06,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:11:06,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:11:06,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:11:06,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:11:06,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:11:06,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:11:06,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:11:06,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:11:06,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:11:06,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:11:06,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:11:06,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:11:06,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:11:06,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:11:06,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:11:06,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:11:06,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:11:06,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:11:06,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:11:06,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:11:06,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:11:06,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:11:06,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:11:06,574 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:11:06,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:11:06,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:11:06,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:11:06,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:11:06,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:11:06,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:11:06,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:11:06,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:11:06,576 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:11:06,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:11:06,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:11:06,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:11:06,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:11:06,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:11:06,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:11:06,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:11:06,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:11:06,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:11:06,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:11:06,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:11:06,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:11:06,579 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:11:06,579 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:11:06,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:11:06,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 791fd4c1f54f973c646b3f11f7eb2f654eca269cacf7e504443ee0d13fbe9694 [2022-07-22 11:11:06,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:11:06,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:11:06,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:11:06,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:11:06,745 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:11:06,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2022-07-22 11:11:06,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f7f6fcf/e772ec90eb554a4fbc6bca371fcbe1fd/FLAG711e1eda0 [2022-07-22 11:11:07,245 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:11:07,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2022-07-22 11:11:07,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f7f6fcf/e772ec90eb554a4fbc6bca371fcbe1fd/FLAG711e1eda0 [2022-07-22 11:11:07,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f7f6fcf/e772ec90eb554a4fbc6bca371fcbe1fd [2022-07-22 11:11:07,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:11:07,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:11:07,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:11:07,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:11:07,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:11:07,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:11:07" (1/1) ... [2022-07-22 11:11:07,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ab32bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:07, skipping insertion in model container [2022-07-22 11:11:07,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:11:07" (1/1) ... [2022-07-22 11:11:07,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:11:07,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:11:07,696 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/kbfiltr.i.cil-2.c[62209,62222] [2022-07-22 11:11:07,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:11:07,871 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:11:07,920 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/kbfiltr.i.cil-2.c[62209,62222] [2022-07-22 11:11:07,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:11:08,022 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:11:08,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08 WrapperNode [2022-07-22 11:11:08,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:11:08,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:11:08,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:11:08,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:11:08,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,119 INFO L137 Inliner]: procedures = 109, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1084 [2022-07-22 11:11:08,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:11:08,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:11:08,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:11:08,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:11:08,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:11:08,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:11:08,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:11:08,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:11:08,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (1/1) ... [2022-07-22 11:11:08,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:11:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:11:08,260 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) [2022-07-22 11:11:08,278 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 [2022-07-22 11:11:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2022-07-22 11:11:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2022-07-22 11:11:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-22 11:11:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-22 11:11:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-22 11:11:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:11:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-22 11:11:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-22 11:11:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:11:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-22 11:11:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-22 11:11:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-22 11:11:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-22 11:11:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:11:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:11:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 11:11:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:11:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-22 11:11:08,291 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-22 11:11:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2022-07-22 11:11:08,291 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2022-07-22 11:11:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:11:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 11:11:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:11:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-22 11:11:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:11:08,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:11:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2022-07-22 11:11:08,292 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2022-07-22 11:11:08,548 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:11:08,549 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:11:08,612 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:08,634 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-22 11:11:08,635 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-22 11:11:08,683 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:08,685 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:08,687 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:08,690 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:08,692 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:08,695 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:08,696 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:10,725 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume false; [2022-07-22 11:11:10,725 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume !false; [2022-07-22 11:11:10,725 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##36: assume !false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##157: assume !false; [2022-07-22 11:11:10,726 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-22 11:11:10,727 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##156: assume false; [2022-07-22 11:11:10,727 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##114: assume !false; [2022-07-22 11:11:10,727 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##113: assume false; [2022-07-22 11:11:10,738 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:11:10,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:11:10,743 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 11:11:10,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:11:10 BoogieIcfgContainer [2022-07-22 11:11:10,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:11:10,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:11:10,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:11:10,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:11:10,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:11:07" (1/3) ... [2022-07-22 11:11:10,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f123e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:11:10, skipping insertion in model container [2022-07-22 11:11:10,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:08" (2/3) ... [2022-07-22 11:11:10,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f123e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:11:10, skipping insertion in model container [2022-07-22 11:11:10,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:11:10" (3/3) ... [2022-07-22 11:11:10,750 INFO L111 eAbstractionObserver]: Analyzing ICFG kbfiltr.i.cil-2.c [2022-07-22 11:11:10,759 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:11:10,760 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:11:10,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:11:10,797 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@ce4a0e1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@31507cdc [2022-07-22 11:11:10,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:11:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 11:11:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 11:11:10,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:10,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:10,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash -660511979, now seen corresponding path program 1 times [2022-07-22 11:11:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:10,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737669739] [2022-07-22 11:11:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:10,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737669739] [2022-07-22 11:11:11,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737669739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:11,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:11,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:11:11,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565208174] [2022-07-22 11:11:11,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:11,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 11:11:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 11:11:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:11:11,184 INFO L87 Difference]: Start difference. First operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-07-22 11:11:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:11,231 INFO L93 Difference]: Finished difference Result 472 states and 755 transitions. [2022-07-22 11:11:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 11:11:11,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 16 [2022-07-22 11:11:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:11,242 INFO L225 Difference]: With dead ends: 472 [2022-07-22 11:11:11,242 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 11:11:11,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:11:11,248 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:11,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 11:11:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-22 11:11:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5128205128205128) internal successors, (295), 211 states have internal predecessors, (295), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 11:11:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2022-07-22 11:11:11,290 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 16 [2022-07-22 11:11:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:11,290 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2022-07-22 11:11:11,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-07-22 11:11:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2022-07-22 11:11:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 11:11:11,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:11,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:11:11,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1247317993, now seen corresponding path program 1 times [2022-07-22 11:11:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:11,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108876422] [2022-07-22 11:11:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:11,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108876422] [2022-07-22 11:11:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108876422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:11,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:11,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737746894] [2022-07-22 11:11:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:11,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:11,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:11,458 INFO L87 Difference]: Start difference. First operand 231 states and 339 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-07-22 11:11:12,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:12,821 INFO L93 Difference]: Finished difference Result 248 states and 360 transitions. [2022-07-22 11:11:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 16 [2022-07-22 11:11:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:12,823 INFO L225 Difference]: With dead ends: 248 [2022-07-22 11:11:12,824 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 11:11:12,824 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 [2022-07-22 11:11:12,825 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 249 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:12,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 737 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 11:11:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 11:11:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-22 11:11:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5076923076923077) internal successors, (294), 211 states have internal predecessors, (294), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 11:11:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 338 transitions. [2022-07-22 11:11:12,838 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 338 transitions. Word has length 16 [2022-07-22 11:11:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:12,839 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 338 transitions. [2022-07-22 11:11:12,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-07-22 11:11:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 338 transitions. [2022-07-22 11:11:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 11:11:12,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:12,840 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] [2022-07-22 11:11:12,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:11:12,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 8900389, now seen corresponding path program 1 times [2022-07-22 11:11:12,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267003631] [2022-07-22 11:11:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:12,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:12,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267003631] [2022-07-22 11:11:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267003631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:12,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:12,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:12,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746800128] [2022-07-22 11:11:12,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:12,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:12,983 INFO L87 Difference]: Start difference. First operand 231 states and 338 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:13,277 INFO L93 Difference]: Finished difference Result 603 states and 904 transitions. [2022-07-22 11:11:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 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 28 [2022-07-22 11:11:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:13,279 INFO L225 Difference]: With dead ends: 603 [2022-07-22 11:11:13,280 INFO L226 Difference]: Without dead ends: 392 [2022-07-22 11:11:13,281 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 [2022-07-22 11:11:13,282 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 442 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:13,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1254 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:11:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-22 11:11:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 233. [2022-07-22 11:11:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 197 states have (on average 1.50253807106599) internal successors, (296), 213 states have internal predecessors, (296), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 11:11:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 340 transitions. [2022-07-22 11:11:13,302 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 340 transitions. Word has length 28 [2022-07-22 11:11:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:13,302 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 340 transitions. [2022-07-22 11:11:13,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 340 transitions. [2022-07-22 11:11:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 11:11:13,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:13,307 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] [2022-07-22 11:11:13,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:11:13,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:13,310 INFO L85 PathProgramCache]: Analyzing trace with hash 620779237, now seen corresponding path program 1 times [2022-07-22 11:11:13,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:13,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137198320] [2022-07-22 11:11:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137198320] [2022-07-22 11:11:13,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137198320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:13,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386046566] [2022-07-22 11:11:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:13,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:13,470 INFO L87 Difference]: Start difference. First operand 233 states and 340 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-07-22 11:11:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:14,321 INFO L93 Difference]: Finished difference Result 354 states and 506 transitions. [2022-07-22 11:11:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-07-22 11:11:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:14,324 INFO L225 Difference]: With dead ends: 354 [2022-07-22 11:11:14,324 INFO L226 Difference]: Without dead ends: 299 [2022-07-22 11:11:14,326 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 [2022-07-22 11:11:14,328 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 244 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:14,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 477 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:11:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-22 11:11:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 283. [2022-07-22 11:11:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 246 states have (on average 1.4308943089430894) internal successors, (352), 249 states have internal predecessors, (352), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 18 states have call successors, (27) [2022-07-22 11:11:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 405 transitions. [2022-07-22 11:11:14,341 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 405 transitions. Word has length 28 [2022-07-22 11:11:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:14,341 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 405 transitions. [2022-07-22 11:11:14,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-07-22 11:11:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 405 transitions. [2022-07-22 11:11:14,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:11:14,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:14,343 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] [2022-07-22 11:11:14,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:11:14,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash -451775854, now seen corresponding path program 1 times [2022-07-22 11:11:14,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144763580] [2022-07-22 11:11:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:14,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:14,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:14,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144763580] [2022-07-22 11:11:14,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144763580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:14,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:14,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:14,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387024866] [2022-07-22 11:11:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:14,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:14,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:14,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:14,457 INFO L87 Difference]: Start difference. First operand 283 states and 405 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) [2022-07-22 11:11:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:14,500 INFO L93 Difference]: Finished difference Result 439 states and 613 transitions. [2022-07-22 11:11:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:14,500 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 [2022-07-22 11:11:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:14,504 INFO L225 Difference]: With dead ends: 439 [2022-07-22 11:11:14,504 INFO L226 Difference]: Without dead ends: 340 [2022-07-22 11:11:14,505 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 [2022-07-22 11:11:14,506 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 281 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:14,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 426 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-22 11:11:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 317. [2022-07-22 11:11:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 282 states have (on average 1.425531914893617) internal successors, (402), 283 states have internal predecessors, (402), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2022-07-22 11:11:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 450 transitions. [2022-07-22 11:11:14,518 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 450 transitions. Word has length 30 [2022-07-22 11:11:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:14,518 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 450 transitions. [2022-07-22 11:11:14,518 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) [2022-07-22 11:11:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 450 transitions. [2022-07-22 11:11:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 11:11:14,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:14,520 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] [2022-07-22 11:11:14,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:11:14,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1294247663, now seen corresponding path program 1 times [2022-07-22 11:11:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:14,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430076959] [2022-07-22 11:11:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:14,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:14,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430076959] [2022-07-22 11:11:14,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430076959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:14,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:14,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809917868] [2022-07-22 11:11:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:14,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:14,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:14,640 INFO L87 Difference]: Start difference. First operand 317 states and 450 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:15,327 INFO L93 Difference]: Finished difference Result 341 states and 477 transitions. [2022-07-22 11:11:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-22 11:11:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:15,330 INFO L225 Difference]: With dead ends: 341 [2022-07-22 11:11:15,330 INFO L226 Difference]: Without dead ends: 333 [2022-07-22 11:11:15,331 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 [2022-07-22 11:11:15,332 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 526 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:15,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 400 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:11:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-22 11:11:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 322. [2022-07-22 11:11:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 287 states have (on average 1.421602787456446) internal successors, (408), 288 states have internal predecessors, (408), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2022-07-22 11:11:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 456 transitions. [2022-07-22 11:11:15,351 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 456 transitions. Word has length 32 [2022-07-22 11:11:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:15,352 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 456 transitions. [2022-07-22 11:11:15,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 456 transitions. [2022-07-22 11:11:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 11:11:15,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:15,355 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] [2022-07-22 11:11:15,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:11:15,356 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:15,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1059548875, now seen corresponding path program 1 times [2022-07-22 11:11:15,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:15,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441769944] [2022-07-22 11:11:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:15,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:15,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:15,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441769944] [2022-07-22 11:11:15,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441769944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:15,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:15,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419158638] [2022-07-22 11:11:15,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:15,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:15,498 INFO L87 Difference]: Start difference. First operand 322 states and 456 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-07-22 11:11:17,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:17,663 INFO L93 Difference]: Finished difference Result 341 states and 476 transitions. [2022-07-22 11:11:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 33 [2022-07-22 11:11:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:17,665 INFO L225 Difference]: With dead ends: 341 [2022-07-22 11:11:17,665 INFO L226 Difference]: Without dead ends: 333 [2022-07-22 11:11:17,666 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 [2022-07-22 11:11:17,666 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 523 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:17,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 403 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 104 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 11:11:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-22 11:11:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 323. [2022-07-22 11:11:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 288 states have (on average 1.4201388888888888) internal successors, (409), 289 states have internal predecessors, (409), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2022-07-22 11:11:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 457 transitions. [2022-07-22 11:11:17,677 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 457 transitions. Word has length 33 [2022-07-22 11:11:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:17,677 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 457 transitions. [2022-07-22 11:11:17,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-07-22 11:11:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 457 transitions. [2022-07-22 11:11:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 11:11:17,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:17,678 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] [2022-07-22 11:11:17,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:11:17,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1752141914, now seen corresponding path program 1 times [2022-07-22 11:11:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:17,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927775128] [2022-07-22 11:11:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:17,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:17,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927775128] [2022-07-22 11:11:17,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927775128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:17,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:17,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513327051] [2022-07-22 11:11:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:17,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:17,762 INFO L87 Difference]: Start difference. First operand 323 states and 457 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:17,880 INFO L93 Difference]: Finished difference Result 335 states and 468 transitions. [2022-07-22 11:11:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-22 11:11:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:17,882 INFO L225 Difference]: With dead ends: 335 [2022-07-22 11:11:17,882 INFO L226 Difference]: Without dead ends: 293 [2022-07-22 11:11:17,883 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 [2022-07-22 11:11:17,883 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 513 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:17,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 401 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:11:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-22 11:11:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2022-07-22 11:11:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 258 states have (on average 1.441860465116279) internal successors, (372), 264 states have internal predecessors, (372), 22 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 11:11:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 412 transitions. [2022-07-22 11:11:17,893 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 412 transitions. Word has length 34 [2022-07-22 11:11:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:17,893 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 412 transitions. [2022-07-22 11:11:17,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 412 transitions. [2022-07-22 11:11:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 11:11:17,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:17,894 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] [2022-07-22 11:11:17,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:11:17,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash 350835753, now seen corresponding path program 1 times [2022-07-22 11:11:17,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:17,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426997139] [2022-07-22 11:11:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:17,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:17,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:17,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426997139] [2022-07-22 11:11:17,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426997139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:17,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:17,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697857654] [2022-07-22 11:11:17,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:17,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:17,993 INFO L87 Difference]: Start difference. First operand 290 states and 412 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:18,770 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2022-07-22 11:11:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-22 11:11:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:18,772 INFO L225 Difference]: With dead ends: 293 [2022-07-22 11:11:18,772 INFO L226 Difference]: Without dead ends: 289 [2022-07-22 11:11:18,772 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 [2022-07-22 11:11:18,773 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 26 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:18,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 535 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:11:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-22 11:11:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-07-22 11:11:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 258 states have (on average 1.434108527131783) internal successors, (370), 263 states have internal predecessors, (370), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 11:11:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 409 transitions. [2022-07-22 11:11:18,788 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 409 transitions. Word has length 34 [2022-07-22 11:11:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:18,788 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 409 transitions. [2022-07-22 11:11:18,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 409 transitions. [2022-07-22 11:11:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 11:11:18,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:18,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:11:18,790 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash 407921745, now seen corresponding path program 1 times [2022-07-22 11:11:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:18,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28211917] [2022-07-22 11:11:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28211917] [2022-07-22 11:11:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28211917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:18,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:18,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782022447] [2022-07-22 11:11:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:18,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:18,895 INFO L87 Difference]: Start difference. First operand 289 states and 409 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-07-22 11:11:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:19,005 INFO L93 Difference]: Finished difference Result 343 states and 476 transitions. [2022-07-22 11:11:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:19,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 43 [2022-07-22 11:11:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:19,009 INFO L225 Difference]: With dead ends: 343 [2022-07-22 11:11:19,009 INFO L226 Difference]: Without dead ends: 304 [2022-07-22 11:11:19,010 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 [2022-07-22 11:11:19,011 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 325 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:19,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 498 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:11:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-22 11:11:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 289. [2022-07-22 11:11:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 258 states have (on average 1.426356589147287) internal successors, (368), 263 states have internal predecessors, (368), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 11:11:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 407 transitions. [2022-07-22 11:11:19,023 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 407 transitions. Word has length 43 [2022-07-22 11:11:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:19,024 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 407 transitions. [2022-07-22 11:11:19,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-07-22 11:11:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 407 transitions. [2022-07-22 11:11:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:11:19,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:19,026 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] [2022-07-22 11:11:19,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:11:19,027 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1067937794, now seen corresponding path program 1 times [2022-07-22 11:11:19,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:19,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129802622] [2022-07-22 11:11:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:19,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:19,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:11:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:19,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129802622] [2022-07-22 11:11:19,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129802622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:19,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:19,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:11:19,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762410046] [2022-07-22 11:11:19,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:19,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:11:19,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:19,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:11:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:19,173 INFO L87 Difference]: Start difference. First operand 289 states and 407 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:21,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:22,017 INFO L93 Difference]: Finished difference Result 316 states and 439 transitions. [2022-07-22 11:11:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:11:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-22 11:11:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:22,019 INFO L225 Difference]: With dead ends: 316 [2022-07-22 11:11:22,019 INFO L226 Difference]: Without dead ends: 308 [2022-07-22 11:11:22,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:22,020 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 371 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:22,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 727 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 138 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 11:11:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-22 11:11:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 300. [2022-07-22 11:11:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 269 states have (on average 1.420074349442379) internal successors, (382), 273 states have internal predecessors, (382), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 11:11:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 421 transitions. [2022-07-22 11:11:22,032 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 421 transitions. Word has length 44 [2022-07-22 11:11:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:22,032 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 421 transitions. [2022-07-22 11:11:22,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 421 transitions. [2022-07-22 11:11:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:11:22,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:22,033 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] [2022-07-22 11:11:22,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:11:22,034 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:22,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1661089768, now seen corresponding path program 1 times [2022-07-22 11:11:22,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:22,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143885448] [2022-07-22 11:11:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:22,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:11:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:22,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:22,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143885448] [2022-07-22 11:11:22,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143885448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:22,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:22,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:11:22,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35418430] [2022-07-22 11:11:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:22,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:11:22,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:11:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:22,188 INFO L87 Difference]: Start difference. First operand 300 states and 421 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, (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) [2022-07-22 11:11:23,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:24,039 INFO L93 Difference]: Finished difference Result 316 states and 438 transitions. [2022-07-22 11:11:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:11:24,039 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-22 11:11:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:24,040 INFO L225 Difference]: With dead ends: 316 [2022-07-22 11:11:24,040 INFO L226 Difference]: Without dead ends: 308 [2022-07-22 11:11:24,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:24,041 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 367 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:24,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 729 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 11:11:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-22 11:11:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2022-07-22 11:11:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 270 states have (on average 1.4185185185185185) internal successors, (383), 274 states have internal predecessors, (383), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 11:11:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 422 transitions. [2022-07-22 11:11:24,052 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 422 transitions. Word has length 45 [2022-07-22 11:11:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:24,052 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 422 transitions. [2022-07-22 11:11:24,052 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, (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) [2022-07-22 11:11:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 422 transitions. [2022-07-22 11:11:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:11:24,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:24,053 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] [2022-07-22 11:11:24,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:11:24,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1877198546, now seen corresponding path program 1 times [2022-07-22 11:11:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510586952] [2022-07-22 11:11:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:24,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:11:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:24,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:24,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510586952] [2022-07-22 11:11:24,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510586952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:24,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:24,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:24,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378344269] [2022-07-22 11:11:24,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:24,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:24,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:24,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:24,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:24,146 INFO L87 Difference]: Start difference. First operand 301 states and 422 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:27,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:27,296 INFO L93 Difference]: Finished difference Result 348 states and 473 transitions. [2022-07-22 11:11:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:11:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-22 11:11:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:27,298 INFO L225 Difference]: With dead ends: 348 [2022-07-22 11:11:27,298 INFO L226 Difference]: Without dead ends: 289 [2022-07-22 11:11:27,299 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 [2022-07-22 11:11:27,299 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 362 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:27,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 844 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 11:11:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-22 11:11:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2022-07-22 11:11:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 242 states have (on average 1.4049586776859504) internal successors, (340), 246 states have internal predecessors, (340), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-22 11:11:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 374 transitions. [2022-07-22 11:11:27,345 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 374 transitions. Word has length 45 [2022-07-22 11:11:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:27,345 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 374 transitions. [2022-07-22 11:11:27,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 374 transitions. [2022-07-22 11:11:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:11:27,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:27,346 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] [2022-07-22 11:11:27,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:11:27,346 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash 859522540, now seen corresponding path program 1 times [2022-07-22 11:11:27,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:27,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918945490] [2022-07-22 11:11:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:27,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:27,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918945490] [2022-07-22 11:11:27,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918945490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:27,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:27,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:27,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532396120] [2022-07-22 11:11:27,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:27,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:27,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:27,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:27,501 INFO L87 Difference]: Start difference. First operand 271 states and 374 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-07-22 11:11:28,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:28,625 INFO L93 Difference]: Finished difference Result 310 states and 423 transitions. [2022-07-22 11:11:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 45 [2022-07-22 11:11:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:28,627 INFO L225 Difference]: With dead ends: 310 [2022-07-22 11:11:28,627 INFO L226 Difference]: Without dead ends: 269 [2022-07-22 11:11:28,627 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 [2022-07-22 11:11:28,628 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 303 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:28,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 500 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 11:11:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-22 11:11:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-07-22 11:11:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 240 states have (on average 1.4) internal successors, (336), 244 states have internal predecessors, (336), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-22 11:11:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 370 transitions. [2022-07-22 11:11:28,641 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 370 transitions. Word has length 45 [2022-07-22 11:11:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:28,641 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 370 transitions. [2022-07-22 11:11:28,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-07-22 11:11:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 370 transitions. [2022-07-22 11:11:28,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:11:28,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:28,642 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] [2022-07-22 11:11:28,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:11:28,642 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:28,643 INFO L85 PathProgramCache]: Analyzing trace with hash 285533420, now seen corresponding path program 1 times [2022-07-22 11:11:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:28,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819858769] [2022-07-22 11:11:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:28,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:28,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819858769] [2022-07-22 11:11:28,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819858769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:28,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:28,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098390554] [2022-07-22 11:11:28,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:28,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:28,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:28,747 INFO L87 Difference]: Start difference. First operand 269 states and 370 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-07-22 11:11:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:28,769 INFO L93 Difference]: Finished difference Result 286 states and 391 transitions. [2022-07-22 11:11:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 45 [2022-07-22 11:11:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:28,770 INFO L225 Difference]: With dead ends: 286 [2022-07-22 11:11:28,770 INFO L226 Difference]: Without dead ends: 263 [2022-07-22 11:11:28,771 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 [2022-07-22 11:11:28,772 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 285 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:28,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-22 11:11:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-07-22 11:11:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 235 states have (on average 1.3872340425531915) internal successors, (326), 238 states have internal predecessors, (326), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-22 11:11:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 359 transitions. [2022-07-22 11:11:28,786 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 359 transitions. Word has length 45 [2022-07-22 11:11:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:28,786 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 359 transitions. [2022-07-22 11:11:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-07-22 11:11:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 359 transitions. [2022-07-22 11:11:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:11:28,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:28,787 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] [2022-07-22 11:11:28,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 11:11:28,788 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 270131950, now seen corresponding path program 1 times [2022-07-22 11:11:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385533629] [2022-07-22 11:11:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:28,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:28,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385533629] [2022-07-22 11:11:28,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385533629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:28,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:28,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:11:28,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057869607] [2022-07-22 11:11:28,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:28,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:11:28,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:11:28,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:28,927 INFO L87 Difference]: Start difference. First operand 263 states and 359 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2022-07-22 11:11:30,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:31,000 INFO L93 Difference]: Finished difference Result 283 states and 381 transitions. [2022-07-22 11:11:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:11:31,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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 46 [2022-07-22 11:11:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:31,002 INFO L225 Difference]: With dead ends: 283 [2022-07-22 11:11:31,002 INFO L226 Difference]: Without dead ends: 262 [2022-07-22 11:11:31,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:31,003 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 50 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:31,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1444 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 11:11:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-22 11:11:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-07-22 11:11:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 234 states have (on average 1.3846153846153846) internal successors, (324), 237 states have internal predecessors, (324), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-22 11:11:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 357 transitions. [2022-07-22 11:11:31,015 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 357 transitions. Word has length 46 [2022-07-22 11:11:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:31,015 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 357 transitions. [2022-07-22 11:11:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2022-07-22 11:11:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 357 transitions. [2022-07-22 11:11:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 11:11:31,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:31,016 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] [2022-07-22 11:11:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:11:31,017 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1666913919, now seen corresponding path program 1 times [2022-07-22 11:11:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:31,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248844473] [2022-07-22 11:11:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:31,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:11:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:31,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248844473] [2022-07-22 11:11:31,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248844473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:31,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:31,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:31,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321445516] [2022-07-22 11:11:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:31,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:31,122 INFO L87 Difference]: Start difference. First operand 262 states and 357 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 1 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) [2022-07-22 11:11:32,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:32,813 INFO L93 Difference]: Finished difference Result 502 states and 687 transitions. [2022-07-22 11:11:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:11:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 1 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 47 [2022-07-22 11:11:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:32,815 INFO L225 Difference]: With dead ends: 502 [2022-07-22 11:11:32,815 INFO L226 Difference]: Without dead ends: 262 [2022-07-22 11:11:32,815 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 [2022-07-22 11:11:32,816 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 41 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:32,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1030 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 11:11:32,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-22 11:11:32,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2022-07-22 11:11:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 232 states have (on average 1.3836206896551724) internal successors, (321), 235 states have internal predecessors, (321), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-22 11:11:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 354 transitions. [2022-07-22 11:11:32,826 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 354 transitions. Word has length 47 [2022-07-22 11:11:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:32,826 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 354 transitions. [2022-07-22 11:11:32,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 1 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) [2022-07-22 11:11:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 354 transitions. [2022-07-22 11:11:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:11:32,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:32,827 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] [2022-07-22 11:11:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:11:32,828 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1795358223, now seen corresponding path program 1 times [2022-07-22 11:11:32,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:32,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343365630] [2022-07-22 11:11:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:32,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 11:11:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:32,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:32,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343365630] [2022-07-22 11:11:32,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343365630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:32,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:32,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:11:32,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640695721] [2022-07-22 11:11:32,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:32,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:11:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:11:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:32,944 INFO L87 Difference]: Start difference. First operand 260 states and 354 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2022-07-22 11:11:34,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:35,105 INFO L93 Difference]: Finished difference Result 312 states and 413 transitions. [2022-07-22 11:11:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:11:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 [2022-07-22 11:11:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:35,107 INFO L225 Difference]: With dead ends: 312 [2022-07-22 11:11:35,107 INFO L226 Difference]: Without dead ends: 259 [2022-07-22 11:11:35,107 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 [2022-07-22 11:11:35,107 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 65 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:35,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1292 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 11:11:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-22 11:11:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-07-22 11:11:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 231 states have (on average 1.367965367965368) internal successors, (316), 234 states have internal predecessors, (316), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-07-22 11:11:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 349 transitions. [2022-07-22 11:11:35,119 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 349 transitions. Word has length 52 [2022-07-22 11:11:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:35,119 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 349 transitions. [2022-07-22 11:11:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2022-07-22 11:11:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 349 transitions. [2022-07-22 11:11:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:11:35,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:35,120 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] [2022-07-22 11:11:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:11:35,120 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash -18191150, now seen corresponding path program 1 times [2022-07-22 11:11:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:35,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843585771] [2022-07-22 11:11:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:35,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:35,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843585771] [2022-07-22 11:11:35,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843585771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:35,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:35,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:35,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044189418] [2022-07-22 11:11:35,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:35,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:35,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:35,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:35,264 INFO L87 Difference]: Start difference. First operand 259 states and 349 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2022-07-22 11:11:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:35,357 INFO L93 Difference]: Finished difference Result 291 states and 389 transitions. [2022-07-22 11:11:35,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:35,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 52 [2022-07-22 11:11:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:35,358 INFO L225 Difference]: With dead ends: 291 [2022-07-22 11:11:35,358 INFO L226 Difference]: Without dead ends: 177 [2022-07-22 11:11:35,359 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 [2022-07-22 11:11:35,359 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 292 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:35,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 509 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:11:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-22 11:11:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2022-07-22 11:11:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 137 states have (on average 1.3211678832116789) internal successors, (181), 140 states have internal predecessors, (181), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-22 11:11:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2022-07-22 11:11:35,367 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 52 [2022-07-22 11:11:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:35,368 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2022-07-22 11:11:35,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2022-07-22 11:11:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2022-07-22 11:11:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 11:11:35,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:35,368 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] [2022-07-22 11:11:35,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 11:11:35,369 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1854339953, now seen corresponding path program 1 times [2022-07-22 11:11:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:35,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298512199] [2022-07-22 11:11:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:35,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 11:11:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:35,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298512199] [2022-07-22 11:11:35,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298512199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:35,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:35,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:35,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270286108] [2022-07-22 11:11:35,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:35,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:35,471 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 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) [2022-07-22 11:11:37,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:37,560 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2022-07-22 11:11:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:37,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 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 53 [2022-07-22 11:11:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:37,561 INFO L225 Difference]: With dead ends: 168 [2022-07-22 11:11:37,561 INFO L226 Difference]: Without dead ends: 124 [2022-07-22 11:11:37,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:37,562 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 42 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:37,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 371 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 11:11:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-22 11:11:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-22 11:11:37,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 112 states have internal predecessors, (142), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 11:11:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-07-22 11:11:37,575 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 53 [2022-07-22 11:11:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:37,575 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-07-22 11:11:37,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 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) [2022-07-22 11:11:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-07-22 11:11:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 11:11:37,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:37,576 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] [2022-07-22 11:11:37,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:11:37,577 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:37,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1084558305, now seen corresponding path program 1 times [2022-07-22 11:11:37,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:37,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751829702] [2022-07-22 11:11:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 11:11:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:37,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:11:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:37,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:37,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751829702] [2022-07-22 11:11:37,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751829702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:37,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:37,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088803126] [2022-07-22 11:11:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:37,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:37,687 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:39,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:42,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:42,303 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2022-07-22 11:11:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:11:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-07-22 11:11:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:42,304 INFO L225 Difference]: With dead ends: 173 [2022-07-22 11:11:42,304 INFO L226 Difference]: Without dead ends: 122 [2022-07-22 11:11:42,304 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 [2022-07-22 11:11:42,304 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 31 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:42,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 361 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-07-22 11:11:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-22 11:11:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-22 11:11:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 108 states have (on average 1.287037037037037) internal successors, (139), 110 states have internal predecessors, (139), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 11:11:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2022-07-22 11:11:42,311 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 55 [2022-07-22 11:11:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:42,311 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2022-07-22 11:11:42,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2022-07-22 11:11:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:11:42,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:42,312 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] [2022-07-22 11:11:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 11:11:42,312 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -638228197, now seen corresponding path program 1 times [2022-07-22 11:11:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475350774] [2022-07-22 11:11:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 11:11:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:42,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:42,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475350774] [2022-07-22 11:11:42,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475350774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:42,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:42,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:11:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919893462] [2022-07-22 11:11:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:11:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:11:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:11:42,446 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 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) [2022-07-22 11:11:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:43,305 INFO L93 Difference]: Finished difference Result 211 states and 270 transitions. [2022-07-22 11:11:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:11:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 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 57 [2022-07-22 11:11:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:43,306 INFO L225 Difference]: With dead ends: 211 [2022-07-22 11:11:43,306 INFO L226 Difference]: Without dead ends: 158 [2022-07-22 11:11:43,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:11:43,307 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 46 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:43,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 561 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:11:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-22 11:11:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2022-07-22 11:11:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 124 states have internal predecessors, (154), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-22 11:11:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2022-07-22 11:11:43,314 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 57 [2022-07-22 11:11:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:43,314 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2022-07-22 11:11:43,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 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) [2022-07-22 11:11:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2022-07-22 11:11:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 11:11:43,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:43,315 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] [2022-07-22 11:11:43,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 11:11:43,315 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1799191219, now seen corresponding path program 1 times [2022-07-22 11:11:43,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:43,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544931920] [2022-07-22 11:11:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:43,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 11:11:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:43,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:43,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544931920] [2022-07-22 11:11:43,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544931920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:43,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:43,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603286243] [2022-07-22 11:11:43,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:43,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:43,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:43,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:43,448 INFO L87 Difference]: Start difference. First operand 138 states and 170 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-07-22 11:11:45,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:45,097 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2022-07-22 11:11:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:11:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 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 58 [2022-07-22 11:11:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:45,098 INFO L225 Difference]: With dead ends: 164 [2022-07-22 11:11:45,098 INFO L226 Difference]: Without dead ends: 161 [2022-07-22 11:11:45,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:45,099 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 31 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:45,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 307 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:11:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-22 11:11:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 142. [2022-07-22 11:11:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 128 states have internal predecessors, (160), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-22 11:11:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 176 transitions. [2022-07-22 11:11:45,110 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 176 transitions. Word has length 58 [2022-07-22 11:11:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:45,111 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 176 transitions. [2022-07-22 11:11:45,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-07-22 11:11:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 176 transitions. [2022-07-22 11:11:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:11:45,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:45,111 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] [2022-07-22 11:11:45,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:11:45,112 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash 297674658, now seen corresponding path program 1 times [2022-07-22 11:11:45,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:45,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286584819] [2022-07-22 11:11:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:45,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:45,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 11:11:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:45,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:45,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:45,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286584819] [2022-07-22 11:11:45,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286584819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:45,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:45,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756766885] [2022-07-22 11:11:45,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:45,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:45,239 INFO L87 Difference]: Start difference. First operand 142 states and 176 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:47,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:47,640 INFO L93 Difference]: Finished difference Result 280 states and 346 transitions. [2022-07-22 11:11:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:11:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-07-22 11:11:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:47,642 INFO L225 Difference]: With dead ends: 280 [2022-07-22 11:11:47,642 INFO L226 Difference]: Without dead ends: 253 [2022-07-22 11:11:47,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:11:47,646 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 62 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:47,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 379 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:11:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-22 11:11:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 248. [2022-07-22 11:11:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 223 states have (on average 1.2825112107623318) internal successors, (286), 225 states have internal predecessors, (286), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-22 11:11:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 311 transitions. [2022-07-22 11:11:47,682 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 311 transitions. Word has length 60 [2022-07-22 11:11:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:47,682 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 311 transitions. [2022-07-22 11:11:47,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 311 transitions. [2022-07-22 11:11:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:11:47,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:47,683 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] [2022-07-22 11:11:47,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 11:11:47,684 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2072682020, now seen corresponding path program 1 times [2022-07-22 11:11:47,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:47,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653379459] [2022-07-22 11:11:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:48,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 11:11:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:48,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:48,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:48,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653379459] [2022-07-22 11:11:48,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653379459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:48,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:48,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:48,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854301440] [2022-07-22 11:11:48,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:48,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:48,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:48,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:48,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:48,117 INFO L87 Difference]: Start difference. First operand 248 states and 311 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:50,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:52,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:52,240 INFO L93 Difference]: Finished difference Result 476 states and 599 transitions. [2022-07-22 11:11:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:11:52,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-07-22 11:11:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:52,241 INFO L225 Difference]: With dead ends: 476 [2022-07-22 11:11:52,242 INFO L226 Difference]: Without dead ends: 250 [2022-07-22 11:11:52,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:52,242 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 7 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:52,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 378 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 11:11:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-22 11:11:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-07-22 11:11:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 225 states have (on average 1.28) internal successors, (288), 227 states have internal predecessors, (288), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-22 11:11:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 313 transitions. [2022-07-22 11:11:52,261 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 313 transitions. Word has length 60 [2022-07-22 11:11:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:52,261 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 313 transitions. [2022-07-22 11:11:52,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 313 transitions. [2022-07-22 11:11:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:11:52,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:52,263 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] [2022-07-22 11:11:52,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 11:11:52,263 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1685978785, now seen corresponding path program 1 times [2022-07-22 11:11:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:52,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894582702] [2022-07-22 11:11:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:52,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:52,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:11:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:52,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:52,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894582702] [2022-07-22 11:11:52,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894582702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:11:52,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899191746] [2022-07-22 11:11:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:52,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:11:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:11:52,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:11:52,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:11:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:11:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:11:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:11:53,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:11:53,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899191746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:53,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:11:53,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-07-22 11:11:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692189770] [2022-07-22 11:11:53,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:53,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:53,594 INFO L87 Difference]: Start difference. First operand 250 states and 313 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:53,620 INFO L93 Difference]: Finished difference Result 336 states and 423 transitions. [2022-07-22 11:11:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:11:53,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2022-07-22 11:11:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:53,621 INFO L225 Difference]: With dead ends: 336 [2022-07-22 11:11:53,621 INFO L226 Difference]: Without dead ends: 236 [2022-07-22 11:11:53,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:53,622 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 15 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:53,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 436 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-22 11:11:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-07-22 11:11:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 211 states have (on average 1.2701421800947867) internal successors, (268), 213 states have internal predecessors, (268), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-22 11:11:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 293 transitions. [2022-07-22 11:11:53,661 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 293 transitions. Word has length 61 [2022-07-22 11:11:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:53,662 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 293 transitions. [2022-07-22 11:11:53,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 293 transitions. [2022-07-22 11:11:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:11:53,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:53,663 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] [2022-07-22 11:11:53,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:11:53,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 11:11:53,883 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:53,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1919232474, now seen corresponding path program 1 times [2022-07-22 11:11:53,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:53,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70905222] [2022-07-22 11:11:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:11:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:11:54,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:54,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70905222] [2022-07-22 11:11:54,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70905222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:54,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:54,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:11:54,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961969329] [2022-07-22 11:11:54,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:54,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:11:54,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:54,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:11:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:54,114 INFO L87 Difference]: Start difference. First operand 236 states and 293 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:11:56,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:58,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:59,523 INFO L93 Difference]: Finished difference Result 310 states and 391 transitions. [2022-07-22 11:11:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-07-22 11:11:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:59,524 INFO L225 Difference]: With dead ends: 310 [2022-07-22 11:11:59,524 INFO L226 Difference]: Without dead ends: 224 [2022-07-22 11:11:59,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:11:59,525 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 98 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:59,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 475 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-07-22 11:11:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-22 11:11:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-07-22 11:11:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 201 states have (on average 1.263681592039801) internal successors, (254), 203 states have internal predecessors, (254), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-22 11:11:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 277 transitions. [2022-07-22 11:11:59,539 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 277 transitions. Word has length 65 [2022-07-22 11:11:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:59,539 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 277 transitions. [2022-07-22 11:11:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:11:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 277 transitions. [2022-07-22 11:11:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 11:11:59,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:59,540 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] [2022-07-22 11:11:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-22 11:11:59,540 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:59,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1018080202, now seen corresponding path program 1 times [2022-07-22 11:11:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:59,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827210294] [2022-07-22 11:11:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:59,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:11:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:59,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:11:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:59,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827210294] [2022-07-22 11:11:59,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827210294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:59,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:59,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:11:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002309491] [2022-07-22 11:11:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:59,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:11:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:11:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:59,690 INFO L87 Difference]: Start difference. First operand 224 states and 277 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:12:02,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:03,076 INFO L93 Difference]: Finished difference Result 287 states and 351 transitions. [2022-07-22 11:12:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:12:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-07-22 11:12:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:03,077 INFO L225 Difference]: With dead ends: 287 [2022-07-22 11:12:03,077 INFO L226 Difference]: Without dead ends: 260 [2022-07-22 11:12:03,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:12:03,078 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 47 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:03,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 830 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-22 11:12:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-22 11:12:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2022-07-22 11:12:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 215 states have (on average 1.255813953488372) internal successors, (270), 217 states have internal predecessors, (270), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-22 11:12:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 295 transitions. [2022-07-22 11:12:03,091 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 295 transitions. Word has length 67 [2022-07-22 11:12:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:03,091 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 295 transitions. [2022-07-22 11:12:03,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:12:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 295 transitions. [2022-07-22 11:12:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 11:12:03,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:03,092 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] [2022-07-22 11:12:03,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 11:12:03,092 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash 555821410, now seen corresponding path program 1 times [2022-07-22 11:12:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:03,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854048509] [2022-07-22 11:12:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:03,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:12:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:03,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:03,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:12:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:03,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854048509] [2022-07-22 11:12:03,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854048509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:03,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:03,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:12:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132560536] [2022-07-22 11:12:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:03,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:12:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:12:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:12:03,225 INFO L87 Difference]: Start difference. First operand 240 states and 295 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:12:05,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:06,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:07,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:09,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:09,473 INFO L93 Difference]: Finished difference Result 325 states and 391 transitions. [2022-07-22 11:12:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:12:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-07-22 11:12:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:09,475 INFO L225 Difference]: With dead ends: 325 [2022-07-22 11:12:09,475 INFO L226 Difference]: Without dead ends: 265 [2022-07-22 11:12:09,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:12:09,476 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 56 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:09,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 418 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 87 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-07-22 11:12:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-22 11:12:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2022-07-22 11:12:09,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 221 states have (on average 1.2081447963800904) internal successors, (267), 223 states have internal predecessors, (267), 11 states have call successors, (11), 10 states have call predecessors, (11), 14 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2022-07-22 11:12:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 293 transitions. [2022-07-22 11:12:09,490 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 293 transitions. Word has length 66 [2022-07-22 11:12:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:09,490 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 293 transitions. [2022-07-22 11:12:09,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:12:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 293 transitions. [2022-07-22 11:12:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 11:12:09,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:09,491 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] [2022-07-22 11:12:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 11:12:09,491 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash -118230121, now seen corresponding path program 1 times [2022-07-22 11:12:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:09,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211148448] [2022-07-22 11:12:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:09,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:12:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:09,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:09,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:12:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211148448] [2022-07-22 11:12:09,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211148448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:09,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:09,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:12:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960774701] [2022-07-22 11:12:09,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:09,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:12:09,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:12:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:12:09,706 INFO L87 Difference]: Start difference. First operand 247 states and 293 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:12:11,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:12,773 INFO L93 Difference]: Finished difference Result 336 states and 398 transitions. [2022-07-22 11:12:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:12:12,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-07-22 11:12:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:12,775 INFO L225 Difference]: With dead ends: 336 [2022-07-22 11:12:12,775 INFO L226 Difference]: Without dead ends: 257 [2022-07-22 11:12:12,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:12:12,776 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 44 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:12,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 815 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 11:12:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-07-22 11:12:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 237. [2022-07-22 11:12:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 213 states have (on average 1.187793427230047) internal successors, (253), 215 states have internal predecessors, (253), 11 states have call successors, (11), 10 states have call predecessors, (11), 12 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-22 11:12:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 277 transitions. [2022-07-22 11:12:12,800 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 277 transitions. Word has length 68 [2022-07-22 11:12:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:12,800 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 277 transitions. [2022-07-22 11:12:12,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:12:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 277 transitions. [2022-07-22 11:12:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 11:12:12,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:12,802 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] [2022-07-22 11:12:12,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 11:12:12,803 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1748301759, now seen corresponding path program 1 times [2022-07-22 11:12:12,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:12,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844535425] [2022-07-22 11:12:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:12,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:12:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:12:12,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844535425] [2022-07-22 11:12:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844535425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:12,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:12,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:12:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518357360] [2022-07-22 11:12:12,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:12,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:12:12,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:12:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:12:12,945 INFO L87 Difference]: Start difference. First operand 237 states and 277 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:12:14,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:16,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:16,859 INFO L93 Difference]: Finished difference Result 271 states and 314 transitions. [2022-07-22 11:12:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:12:16,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 74 [2022-07-22 11:12:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:16,860 INFO L225 Difference]: With dead ends: 271 [2022-07-22 11:12:16,860 INFO L226 Difference]: Without dead ends: 216 [2022-07-22 11:12:16,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:12:16,861 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 20 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:16,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 349 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-07-22 11:12:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-22 11:12:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 198. [2022-07-22 11:12:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 178 states have (on average 1.1629213483146068) internal successors, (207), 178 states have internal predecessors, (207), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-22 11:12:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 226 transitions. [2022-07-22 11:12:16,886 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 226 transitions. Word has length 74 [2022-07-22 11:12:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:16,886 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 226 transitions. [2022-07-22 11:12:16,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:12:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 226 transitions. [2022-07-22 11:12:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 11:12:16,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:16,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:16,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 11:12:16,888 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash -452450229, now seen corresponding path program 1 times [2022-07-22 11:12:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:16,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344211184] [2022-07-22 11:12:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:12:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:17,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:17,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:17,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 11:12:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:12:17,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:17,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344211184] [2022-07-22 11:12:17,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344211184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:17,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:17,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 11:12:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147145691] [2022-07-22 11:12:17,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:17,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:12:17,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:12:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:12:17,071 INFO L87 Difference]: Start difference. First operand 198 states and 226 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 7 states have internal predecessors, (73), 3 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) [2022-07-22 11:12:20,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:21,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:21,543 INFO L93 Difference]: Finished difference Result 220 states and 250 transitions. [2022-07-22 11:12:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:12:21,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 7 states have internal predecessors, (73), 3 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 82 [2022-07-22 11:12:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:21,544 INFO L225 Difference]: With dead ends: 220 [2022-07-22 11:12:21,544 INFO L226 Difference]: Without dead ends: 178 [2022-07-22 11:12:21,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:12:21,545 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 59 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:21,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 739 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-07-22 11:12:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-22 11:12:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-07-22 11:12:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 160 states have (on average 1.14375) internal successors, (183), 160 states have internal predecessors, (183), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 11:12:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 200 transitions. [2022-07-22 11:12:21,566 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 200 transitions. Word has length 82 [2022-07-22 11:12:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:21,566 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 200 transitions. [2022-07-22 11:12:21,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 7 states have internal predecessors, (73), 3 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) [2022-07-22 11:12:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 200 transitions. [2022-07-22 11:12:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 11:12:21,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:21,567 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, 1, 1, 1, 1, 1] [2022-07-22 11:12:21,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 11:12:21,568 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -447625103, now seen corresponding path program 1 times [2022-07-22 11:12:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170978221] [2022-07-22 11:12:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:21,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:12:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:21,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:21,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 11:12:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:21,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:21,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170978221] [2022-07-22 11:12:21,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170978221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:21,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026999056] [2022-07-22 11:12:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:21,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:21,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:21,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:21,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:12:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:22,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 11:12:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:12:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:22,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:12:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:22,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026999056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:12:22,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:12:22,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-07-22 11:12:22,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20156455] [2022-07-22 11:12:22,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:12:22,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:12:22,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:12:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:12:22,997 INFO L87 Difference]: Start difference. First operand 178 states and 200 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:12:25,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:26,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:28,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:28,698 INFO L93 Difference]: Finished difference Result 338 states and 383 transitions. [2022-07-22 11:12:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:12:28,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-07-22 11:12:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:28,699 INFO L225 Difference]: With dead ends: 338 [2022-07-22 11:12:28,699 INFO L226 Difference]: Without dead ends: 184 [2022-07-22 11:12:28,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:12:28,700 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 66 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:28,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 530 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-07-22 11:12:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-22 11:12:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-07-22 11:12:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 11:12:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 206 transitions. [2022-07-22 11:12:28,726 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 206 transitions. Word has length 88 [2022-07-22 11:12:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:28,727 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 206 transitions. [2022-07-22 11:12:28,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:12:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 206 transitions. [2022-07-22 11:12:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 11:12:28,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:28,728 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:28,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:12:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 11:12:28,944 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1753567182, now seen corresponding path program 2 times [2022-07-22 11:12:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200659649] [2022-07-22 11:12:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:29,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 11:12:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:29,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:29,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 11:12:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:29,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:29,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200659649] [2022-07-22 11:12:29,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200659649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:29,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543373402] [2022-07-22 11:12:29,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:12:29,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:29,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:29,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:29,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:12:30,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 11:12:30,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:12:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:12:30,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:12:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:12:30,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:12:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543373402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:30,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:12:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-22 11:12:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948182182] [2022-07-22 11:12:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:12:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:12:30,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:12:30,786 INFO L87 Difference]: Start difference. First operand 184 states and 206 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:12:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:30,813 INFO L93 Difference]: Finished difference Result 308 states and 345 transitions. [2022-07-22 11:12:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:12:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 91 [2022-07-22 11:12:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:30,814 INFO L225 Difference]: With dead ends: 308 [2022-07-22 11:12:30,814 INFO L226 Difference]: Without dead ends: 186 [2022-07-22 11:12:30,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:12:30,815 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:30,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:12:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-22 11:12:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-07-22 11:12:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 168 states have (on average 1.1369047619047619) internal successors, (191), 168 states have internal predecessors, (191), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 11:12:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2022-07-22 11:12:30,829 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 91 [2022-07-22 11:12:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:30,829 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2022-07-22 11:12:30,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:12:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2022-07-22 11:12:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 11:12:30,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:30,830 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:30,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:12:31,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:31,050 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash -463830121, now seen corresponding path program 1 times [2022-07-22 11:12:31,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:31,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105180096] [2022-07-22 11:12:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:31,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:31,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 11:12:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:31,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:31,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:31,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 11:12:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:12:31,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:31,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105180096] [2022-07-22 11:12:31,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105180096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:31,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182763452] [2022-07-22 11:12:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:31,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:31,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:31,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:31,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:12:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:12:32,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:12:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:12:32,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:12:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:12:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182763452] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:32,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:12:32,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 5] total 14 [2022-07-22 11:12:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416764300] [2022-07-22 11:12:32,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:32,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:12:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:12:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:12:32,492 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:12:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:32,526 INFO L93 Difference]: Finished difference Result 308 states and 343 transitions. [2022-07-22 11:12:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:12:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (5), 2 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 92 [2022-07-22 11:12:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:32,527 INFO L225 Difference]: With dead ends: 308 [2022-07-22 11:12:32,527 INFO L226 Difference]: Without dead ends: 188 [2022-07-22 11:12:32,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:12:32,528 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 38 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:32,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 201 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:12:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-22 11:12:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-07-22 11:12:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 170 states have (on average 1.1352941176470588) internal successors, (193), 170 states have internal predecessors, (193), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 11:12:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 210 transitions. [2022-07-22 11:12:32,543 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 210 transitions. Word has length 92 [2022-07-22 11:12:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:32,543 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 210 transitions. [2022-07-22 11:12:32,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:12:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 210 transitions. [2022-07-22 11:12:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 11:12:32,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:32,544 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:32,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:12:32,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:32,766 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash 839553712, now seen corresponding path program 1 times [2022-07-22 11:12:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:32,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104589580] [2022-07-22 11:12:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:33,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 11:12:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:33,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:33,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:33,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 11:12:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 11:12:33,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:33,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104589580] [2022-07-22 11:12:33,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104589580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:33,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051416945] [2022-07-22 11:12:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:33,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:33,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:33,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:12:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:12:34,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:12:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 11:12:34,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:12:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 11:12:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051416945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:12:34,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:12:34,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-07-22 11:12:34,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856353782] [2022-07-22 11:12:34,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:12:34,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 11:12:34,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 11:12:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:12:34,668 INFO L87 Difference]: Start difference. First operand 188 states and 210 transitions. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 16 states have internal predecessors, (119), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:12:37,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:38,025 INFO L93 Difference]: Finished difference Result 358 states and 409 transitions. [2022-07-22 11:12:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:12:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 16 states have internal predecessors, (119), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2022-07-22 11:12:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:38,027 INFO L225 Difference]: With dead ends: 358 [2022-07-22 11:12:38,027 INFO L226 Difference]: Without dead ends: 200 [2022-07-22 11:12:38,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:12:38,028 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 70 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:38,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 823 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 189 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 11:12:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-22 11:12:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-07-22 11:12:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 182 states have (on average 1.1263736263736264) internal successors, (205), 182 states have internal predecessors, (205), 8 states have call successors, (8), 8 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 11:12:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2022-07-22 11:12:38,062 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 93 [2022-07-22 11:12:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:38,062 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2022-07-22 11:12:38,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 16 states have internal predecessors, (119), 2 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:12:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2022-07-22 11:12:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 11:12:38,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:38,063 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:38,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 11:12:38,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-22 11:12:38,284 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1195309008, now seen corresponding path program 2 times [2022-07-22 11:12:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:38,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950983686] [2022-07-22 11:12:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:38,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:38,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 11:12:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:38,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 11:12:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 11:12:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950983686] [2022-07-22 11:12:38,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950983686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422692226] [2022-07-22 11:12:38,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:12:38,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:38,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:38,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process