./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 35987657 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-?-3598765 [2022-07-20 22:33:04,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:33:04,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:33:04,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:33:04,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:33:04,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:33:04,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:33:04,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:33:04,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:33:04,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:33:04,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:33:04,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:33:04,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:33:04,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:33:04,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:33:04,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:33:04,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:33:04,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:33:04,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:33:04,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:33:04,131 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:33:04,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:33:04,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:33:04,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:33:04,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:33:04,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:33:04,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:33:04,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:33:04,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:33:04,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:33:04,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:33:04,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:33:04,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:33:04,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:33:04,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:33:04,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:33:04,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:33:04,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:33:04,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:33:04,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:33:04,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:33:04,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:33:04,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:33:04,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:33:04,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:33:04,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:33:04,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:33:04,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:33:04,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:33:04,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:33:04,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:33:04,190 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:33:04,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:33:04,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:33:04,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:33:04,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:33:04,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:33:04,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:33:04,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:33:04,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:33:04,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:33:04,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:33:04,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:33:04,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:33:04,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:33:04,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:33:04,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:33:04,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:33:04,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:33:04,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:33:04,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:33:04,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:33:04,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:33:04,195 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:33:04,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:33:04,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:33:04,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 791fd4c1f54f973c646b3f11f7eb2f654eca269cacf7e504443ee0d13fbe9694 [2022-07-20 22:33:04,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:33:04,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:33:04,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:33:04,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:33:04,511 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:33:04,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2022-07-20 22:33:04,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85d7c262e/e405cd953eb6482aa842c2ef1924801b/FLAG4bcb03f13 [2022-07-20 22:33:05,188 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:33:05,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2022-07-20 22:33:05,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85d7c262e/e405cd953eb6482aa842c2ef1924801b/FLAG4bcb03f13 [2022-07-20 22:33:05,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85d7c262e/e405cd953eb6482aa842c2ef1924801b [2022-07-20 22:33:05,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:33:05,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:33:05,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:33:05,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:33:05,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:33:05,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:05" (1/1) ... [2022-07-20 22:33:05,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28530a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:05, skipping insertion in model container [2022-07-20 22:33:05,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:05" (1/1) ... [2022-07-20 22:33:05,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:33:05,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:33:05,969 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] [2022-07-20 22:33:06,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:33:06,183 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:33:06,242 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] [2022-07-20 22:33:06,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:33:06,390 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:33:06,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06 WrapperNode [2022-07-20 22:33:06,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:33:06,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:33:06,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:33:06,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:33:06,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,515 INFO L137 Inliner]: procedures = 109, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1084 [2022-07-20 22:33:06,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:33:06,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:33:06,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:33:06,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:33:06,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:33:06,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:33:06,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:33:06,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:33:06,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (1/1) ... [2022-07-20 22:33:06,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:33:06,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:33:06,667 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) [2022-07-20 22:33:06,696 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 [2022-07-20 22:33:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2022-07-20 22:33:06,709 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2022-07-20 22:33:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-20 22:33:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-20 22:33:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-20 22:33:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:33:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-20 22:33:06,710 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-20 22:33:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:33:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-20 22:33:06,711 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-20 22:33:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-20 22:33:06,711 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-20 22:33:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:33:06,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:33:06,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 22:33:06,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 22:33:06,712 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-20 22:33:06,712 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-20 22:33:06,712 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2022-07-20 22:33:06,712 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2022-07-20 22:33:06,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 22:33:06,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 22:33:06,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:33:06,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-20 22:33:06,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:33:06,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:33:06,713 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2022-07-20 22:33:06,713 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2022-07-20 22:33:07,026 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:33:07,028 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:33:07,113 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:07,150 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-20 22:33:07,150 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-20 22:33:07,238 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:07,240 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:07,241 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:07,248 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:07,250 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:07,253 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:07,254 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:33:09,433 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume false; [2022-07-20 22:33:09,434 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume !false; [2022-07-20 22:33:09,434 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##36: assume !false; [2022-07-20 22:33:09,434 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume false; [2022-07-20 22:33:09,434 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-20 22:33:09,434 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-20 22:33:09,434 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-20 22:33:09,435 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-20 22:33:09,435 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-20 22:33:09,435 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##157: assume !false; [2022-07-20 22:33:09,435 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-20 22:33:09,435 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##156: assume false; [2022-07-20 22:33:09,435 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##114: assume !false; [2022-07-20 22:33:09,436 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##113: assume false; [2022-07-20 22:33:09,452 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:33:09,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:33:09,464 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-20 22:33:09,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:33:09 BoogieIcfgContainer [2022-07-20 22:33:09,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:33:09,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:33:09,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:33:09,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:33:09,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:33:05" (1/3) ... [2022-07-20 22:33:09,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2b605b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:33:09, skipping insertion in model container [2022-07-20 22:33:09,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:06" (2/3) ... [2022-07-20 22:33:09,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2b605b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:33:09, skipping insertion in model container [2022-07-20 22:33:09,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:33:09" (3/3) ... [2022-07-20 22:33:09,473 INFO L111 eAbstractionObserver]: Analyzing ICFG kbfiltr.i.cil-2.c [2022-07-20 22:33:09,486 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:33:09,487 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:33:09,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:33:09,549 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@67ff1637, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4adb7d61 [2022-07-20 22:33:09,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:33:09,559 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) [2022-07-20 22:33:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 22:33:09,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:09,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:33:09,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:09,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -660511979, now seen corresponding path program 1 times [2022-07-20 22:33:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:09,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692263678] [2022-07-20 22:33:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:10,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:10,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692263678] [2022-07-20 22:33:10,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692263678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:10,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:10,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:33:10,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719282237] [2022-07-20 22:33:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:10,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 22:33:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 22:33:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 22:33:10,070 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) [2022-07-20 22:33:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:10,130 INFO L93 Difference]: Finished difference Result 472 states and 755 transitions. [2022-07-20 22:33:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 22:33:10,132 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 [2022-07-20 22:33:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:10,141 INFO L225 Difference]: With dead ends: 472 [2022-07-20 22:33:10,141 INFO L226 Difference]: Without dead ends: 231 [2022-07-20 22:33:10,146 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 [2022-07-20 22:33:10,152 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 [2022-07-20 22:33:10,152 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] [2022-07-20 22:33:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-20 22:33:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-20 22:33:10,261 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) [2022-07-20 22:33:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2022-07-20 22:33:10,264 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 16 [2022-07-20 22:33:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:10,265 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2022-07-20 22:33:10,265 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) [2022-07-20 22:33:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2022-07-20 22:33:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 22:33:10,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:10,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:33:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:33:10,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1247317993, now seen corresponding path program 1 times [2022-07-20 22:33:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:10,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743321932] [2022-07-20 22:33:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:10,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:10,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743321932] [2022-07-20 22:33:10,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743321932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:10,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:10,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:10,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904120915] [2022-07-20 22:33:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:10,468 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) [2022-07-20 22:33:11,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:11,963 INFO L93 Difference]: Finished difference Result 248 states and 360 transitions. [2022-07-20 22:33:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:11,964 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 [2022-07-20 22:33:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:11,966 INFO L225 Difference]: With dead ends: 248 [2022-07-20 22:33:11,969 INFO L226 Difference]: Without dead ends: 231 [2022-07-20 22:33:11,970 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 [2022-07-20 22:33:11,972 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 249 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:11,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 737 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 22:33:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-20 22:33:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-20 22:33:11,990 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) [2022-07-20 22:33:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 338 transitions. [2022-07-20 22:33:11,993 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 338 transitions. Word has length 16 [2022-07-20 22:33:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:11,993 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 338 transitions. [2022-07-20 22:33:11,994 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) [2022-07-20 22:33:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 338 transitions. [2022-07-20 22:33:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:33:11,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:11,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:33:11,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:33:11,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:11,997 INFO L85 PathProgramCache]: Analyzing trace with hash 8900389, now seen corresponding path program 1 times [2022-07-20 22:33:11,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:11,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643240616] [2022-07-20 22:33:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:11,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:12,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643240616] [2022-07-20 22:33:12,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643240616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:12,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:12,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894573707] [2022-07-20 22:33:12,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:12,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:12,165 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) [2022-07-20 22:33:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:12,496 INFO L93 Difference]: Finished difference Result 603 states and 904 transitions. [2022-07-20 22:33:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:12,497 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 [2022-07-20 22:33:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:12,500 INFO L225 Difference]: With dead ends: 603 [2022-07-20 22:33:12,500 INFO L226 Difference]: Without dead ends: 392 [2022-07-20 22:33:12,501 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 [2022-07-20 22:33:12,501 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 442 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-20 22:33:12,502 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] [2022-07-20 22:33:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-20 22:33:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 233. [2022-07-20 22:33:12,556 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) [2022-07-20 22:33:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 340 transitions. [2022-07-20 22:33:12,557 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 340 transitions. Word has length 28 [2022-07-20 22:33:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:12,558 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 340 transitions. [2022-07-20 22:33:12,558 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) [2022-07-20 22:33:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 340 transitions. [2022-07-20 22:33:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:33:12,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:12,560 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] [2022-07-20 22:33:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:33:12,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash 620779237, now seen corresponding path program 1 times [2022-07-20 22:33:12,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:12,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355065606] [2022-07-20 22:33:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:12,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:12,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:12,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355065606] [2022-07-20 22:33:12,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355065606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:12,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:12,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:33:12,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415475392] [2022-07-20 22:33:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:12,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:33:12,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:33:12,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:33:12,740 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) [2022-07-20 22:33:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:13,706 INFO L93 Difference]: Finished difference Result 354 states and 506 transitions. [2022-07-20 22:33:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:33:13,707 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 [2022-07-20 22:33:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:13,709 INFO L225 Difference]: With dead ends: 354 [2022-07-20 22:33:13,709 INFO L226 Difference]: Without dead ends: 299 [2022-07-20 22:33:13,710 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 [2022-07-20 22:33:13,711 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 244 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:13,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 477 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:33:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-20 22:33:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 283. [2022-07-20 22:33:13,738 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) [2022-07-20 22:33:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 405 transitions. [2022-07-20 22:33:13,739 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 405 transitions. Word has length 28 [2022-07-20 22:33:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:13,740 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 405 transitions. [2022-07-20 22:33:13,740 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) [2022-07-20 22:33:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 405 transitions. [2022-07-20 22:33:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 22:33:13,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:13,742 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] [2022-07-20 22:33:13,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:33:13,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash -451775854, now seen corresponding path program 1 times [2022-07-20 22:33:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:13,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121392831] [2022-07-20 22:33:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:13,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:13,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121392831] [2022-07-20 22:33:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121392831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:13,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:13,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:33:13,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573831337] [2022-07-20 22:33:13,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:33:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:33:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:33:13,880 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) [2022-07-20 22:33:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:13,908 INFO L93 Difference]: Finished difference Result 439 states and 613 transitions. [2022-07-20 22:33:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:33:13,909 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 [2022-07-20 22:33:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:13,913 INFO L225 Difference]: With dead ends: 439 [2022-07-20 22:33:13,913 INFO L226 Difference]: Without dead ends: 340 [2022-07-20 22:33:13,914 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 [2022-07-20 22:33:13,916 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 [2022-07-20 22:33:13,916 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] [2022-07-20 22:33:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-20 22:33:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 317. [2022-07-20 22:33:13,934 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) [2022-07-20 22:33:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 450 transitions. [2022-07-20 22:33:13,935 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 450 transitions. Word has length 30 [2022-07-20 22:33:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:13,936 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 450 transitions. [2022-07-20 22:33:13,936 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) [2022-07-20 22:33:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 450 transitions. [2022-07-20 22:33:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:33:13,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:13,942 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] [2022-07-20 22:33:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:33:13,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1294247663, now seen corresponding path program 1 times [2022-07-20 22:33:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:13,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087021925] [2022-07-20 22:33:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:14,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:14,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087021925] [2022-07-20 22:33:14,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087021925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:14,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:14,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:14,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627229354] [2022-07-20 22:33:14,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:14,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:14,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:14,163 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) [2022-07-20 22:33:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:14,952 INFO L93 Difference]: Finished difference Result 341 states and 477 transitions. [2022-07-20 22:33:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:14,952 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 [2022-07-20 22:33:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:14,956 INFO L225 Difference]: With dead ends: 341 [2022-07-20 22:33:14,956 INFO L226 Difference]: Without dead ends: 333 [2022-07-20 22:33:14,957 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 [2022-07-20 22:33:14,957 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 526 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:14,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 400 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:33:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-20 22:33:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 322. [2022-07-20 22:33:14,970 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) [2022-07-20 22:33:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 456 transitions. [2022-07-20 22:33:14,975 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 456 transitions. Word has length 32 [2022-07-20 22:33:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:14,977 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 456 transitions. [2022-07-20 22:33:14,977 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) [2022-07-20 22:33:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 456 transitions. [2022-07-20 22:33:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 22:33:14,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:14,981 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] [2022-07-20 22:33:14,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:33:14,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:14,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1059548875, now seen corresponding path program 1 times [2022-07-20 22:33:14,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412249676] [2022-07-20 22:33:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:15,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:15,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412249676] [2022-07-20 22:33:15,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412249676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:15,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:15,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:15,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263931525] [2022-07-20 22:33:15,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:15,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:15,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:15,167 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) [2022-07-20 22:33:17,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:17,222 INFO L93 Difference]: Finished difference Result 341 states and 476 transitions. [2022-07-20 22:33:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:17,223 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 [2022-07-20 22:33:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:17,224 INFO L225 Difference]: With dead ends: 341 [2022-07-20 22:33:17,224 INFO L226 Difference]: Without dead ends: 333 [2022-07-20 22:33:17,225 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 [2022-07-20 22:33:17,225 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 523 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:17,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 403 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:33:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-20 22:33:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 323. [2022-07-20 22:33:17,239 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) [2022-07-20 22:33:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 457 transitions. [2022-07-20 22:33:17,240 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 457 transitions. Word has length 33 [2022-07-20 22:33:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:17,241 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 457 transitions. [2022-07-20 22:33:17,241 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) [2022-07-20 22:33:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 457 transitions. [2022-07-20 22:33:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 22:33:17,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:17,242 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] [2022-07-20 22:33:17,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:33:17,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:17,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1752141914, now seen corresponding path program 1 times [2022-07-20 22:33:17,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:17,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22132769] [2022-07-20 22:33:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:17,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:17,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22132769] [2022-07-20 22:33:17,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22132769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:17,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:17,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574673771] [2022-07-20 22:33:17,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:17,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:17,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:17,358 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) [2022-07-20 22:33:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:17,519 INFO L93 Difference]: Finished difference Result 335 states and 468 transitions. [2022-07-20 22:33:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:17,520 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 [2022-07-20 22:33:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:17,521 INFO L225 Difference]: With dead ends: 335 [2022-07-20 22:33:17,521 INFO L226 Difference]: Without dead ends: 293 [2022-07-20 22:33:17,522 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 [2022-07-20 22:33:17,523 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 [2022-07-20 22:33:17,523 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] [2022-07-20 22:33:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-20 22:33:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2022-07-20 22:33:17,534 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) [2022-07-20 22:33:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 412 transitions. [2022-07-20 22:33:17,536 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 412 transitions. Word has length 34 [2022-07-20 22:33:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:17,536 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 412 transitions. [2022-07-20 22:33:17,536 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) [2022-07-20 22:33:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 412 transitions. [2022-07-20 22:33:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 22:33:17,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:17,537 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] [2022-07-20 22:33:17,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:33:17,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash 350835753, now seen corresponding path program 1 times [2022-07-20 22:33:17,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:17,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305676889] [2022-07-20 22:33:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:17,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:17,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:17,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305676889] [2022-07-20 22:33:17,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305676889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:17,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:17,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:33:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623622090] [2022-07-20 22:33:17,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:33:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:33:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:33:17,648 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) [2022-07-20 22:33:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:18,107 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2022-07-20 22:33:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:33:18,108 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 [2022-07-20 22:33:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:18,109 INFO L225 Difference]: With dead ends: 293 [2022-07-20 22:33:18,109 INFO L226 Difference]: Without dead ends: 289 [2022-07-20 22:33:18,110 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 [2022-07-20 22:33:18,110 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 26 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:18,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 535 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:33:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-20 22:33:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-07-20 22:33:18,122 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) [2022-07-20 22:33:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 409 transitions. [2022-07-20 22:33:18,124 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 409 transitions. Word has length 34 [2022-07-20 22:33:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:18,124 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 409 transitions. [2022-07-20 22:33:18,124 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) [2022-07-20 22:33:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 409 transitions. [2022-07-20 22:33:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 22:33:18,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:18,126 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] [2022-07-20 22:33:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:33:18,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 407921745, now seen corresponding path program 1 times [2022-07-20 22:33:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618338213] [2022-07-20 22:33:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:18,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:18,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618338213] [2022-07-20 22:33:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618338213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:18,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:18,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128476605] [2022-07-20 22:33:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:18,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:18,262 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) [2022-07-20 22:33:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:18,384 INFO L93 Difference]: Finished difference Result 343 states and 476 transitions. [2022-07-20 22:33:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:18,385 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 [2022-07-20 22:33:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:18,387 INFO L225 Difference]: With dead ends: 343 [2022-07-20 22:33:18,387 INFO L226 Difference]: Without dead ends: 304 [2022-07-20 22:33:18,387 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 [2022-07-20 22:33:18,388 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 [2022-07-20 22:33:18,389 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] [2022-07-20 22:33:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-20 22:33:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 289. [2022-07-20 22:33:18,402 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) [2022-07-20 22:33:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 407 transitions. [2022-07-20 22:33:18,404 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 407 transitions. Word has length 43 [2022-07-20 22:33:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:18,404 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 407 transitions. [2022-07-20 22:33:18,404 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) [2022-07-20 22:33:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 407 transitions. [2022-07-20 22:33:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 22:33:18,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:18,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:33:18,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:33:18,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:18,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1067937794, now seen corresponding path program 1 times [2022-07-20 22:33:18,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:18,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466256336] [2022-07-20 22:33:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:18,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:18,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 22:33:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:18,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466256336] [2022-07-20 22:33:18,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466256336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:18,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:18,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:33:18,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126882449] [2022-07-20 22:33:18,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:33:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:33:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:33:18,643 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) [2022-07-20 22:33:20,653 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 [] [2022-07-20 22:33:22,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:22,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:22,333 INFO L93 Difference]: Finished difference Result 316 states and 439 transitions. [2022-07-20 22:33:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:33:22,334 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 [2022-07-20 22:33:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:22,335 INFO L225 Difference]: With dead ends: 316 [2022-07-20 22:33:22,335 INFO L226 Difference]: Without dead ends: 308 [2022-07-20 22:33:22,336 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 [2022-07-20 22:33:22,336 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 371 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s 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, 3.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:22,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 727 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 138 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-20 22:33:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-20 22:33:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 300. [2022-07-20 22:33:22,353 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) [2022-07-20 22:33:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 421 transitions. [2022-07-20 22:33:22,355 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 421 transitions. Word has length 44 [2022-07-20 22:33:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:22,355 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 421 transitions. [2022-07-20 22:33:22,355 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) [2022-07-20 22:33:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 421 transitions. [2022-07-20 22:33:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:33:22,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:22,357 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] [2022-07-20 22:33:22,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:33:22,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1661089768, now seen corresponding path program 1 times [2022-07-20 22:33:22,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:22,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665984405] [2022-07-20 22:33:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:22,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:22,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 22:33:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:22,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665984405] [2022-07-20 22:33:22,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665984405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:22,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:22,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:33:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709380636] [2022-07-20 22:33:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:33:22,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:33:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:33:22,568 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) [2022-07-20 22:33:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:23,684 INFO L93 Difference]: Finished difference Result 316 states and 438 transitions. [2022-07-20 22:33:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:33:23,685 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 [2022-07-20 22:33:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:23,687 INFO L225 Difference]: With dead ends: 316 [2022-07-20 22:33:23,687 INFO L226 Difference]: Without dead ends: 308 [2022-07-20 22:33:23,687 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 [2022-07-20 22:33:23,688 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 367 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:23,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 729 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 22:33:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-20 22:33:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2022-07-20 22:33:23,702 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) [2022-07-20 22:33:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 422 transitions. [2022-07-20 22:33:23,703 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 422 transitions. Word has length 45 [2022-07-20 22:33:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:23,704 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 422 transitions. [2022-07-20 22:33:23,704 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) [2022-07-20 22:33:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 422 transitions. [2022-07-20 22:33:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:33:23,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:23,705 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] [2022-07-20 22:33:23,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:33:23,705 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:23,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:23,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1877198546, now seen corresponding path program 1 times [2022-07-20 22:33:23,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:23,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585977533] [2022-07-20 22:33:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-20 22:33:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:23,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:23,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585977533] [2022-07-20 22:33:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585977533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:23,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:23,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:33:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985976303] [2022-07-20 22:33:23,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:33:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:33:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:33:23,831 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) [2022-07-20 22:33:26,700 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 [] [2022-07-20 22:33:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:26,867 INFO L93 Difference]: Finished difference Result 348 states and 473 transitions. [2022-07-20 22:33:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:33:26,867 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 [2022-07-20 22:33:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:26,869 INFO L225 Difference]: With dead ends: 348 [2022-07-20 22:33:26,869 INFO L226 Difference]: Without dead ends: 289 [2022-07-20 22:33:26,869 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 [2022-07-20 22:33:26,870 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 362 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s 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, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:26,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 844 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 22:33:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-20 22:33:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2022-07-20 22:33:26,884 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) [2022-07-20 22:33:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 374 transitions. [2022-07-20 22:33:26,885 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 374 transitions. Word has length 45 [2022-07-20 22:33:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:26,885 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 374 transitions. [2022-07-20 22:33:26,886 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) [2022-07-20 22:33:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 374 transitions. [2022-07-20 22:33:26,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:33:26,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:26,887 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] [2022-07-20 22:33:26,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:33:26,887 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 859522540, now seen corresponding path program 1 times [2022-07-20 22:33:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509976642] [2022-07-20 22:33:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509976642] [2022-07-20 22:33:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509976642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:27,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86945482] [2022-07-20 22:33:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:27,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:27,050 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) [2022-07-20 22:33:29,058 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 [] [2022-07-20 22:33:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:29,197 INFO L93 Difference]: Finished difference Result 310 states and 423 transitions. [2022-07-20 22:33:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:29,197 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 [2022-07-20 22:33:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:29,199 INFO L225 Difference]: With dead ends: 310 [2022-07-20 22:33:29,199 INFO L226 Difference]: Without dead ends: 269 [2022-07-20 22:33:29,199 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 [2022-07-20 22:33:29,200 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 303 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:29,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 500 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:33:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-20 22:33:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-07-20 22:33:29,214 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) [2022-07-20 22:33:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 370 transitions. [2022-07-20 22:33:29,215 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 370 transitions. Word has length 45 [2022-07-20 22:33:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:29,215 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 370 transitions. [2022-07-20 22:33:29,215 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) [2022-07-20 22:33:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 370 transitions. [2022-07-20 22:33:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:33:29,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:29,216 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] [2022-07-20 22:33:29,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:33:29,217 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash 285533420, now seen corresponding path program 1 times [2022-07-20 22:33:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:29,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875451731] [2022-07-20 22:33:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875451731] [2022-07-20 22:33:29,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875451731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:29,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:29,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:33:29,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546858657] [2022-07-20 22:33:29,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:29,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:33:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:33:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:33:29,353 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) [2022-07-20 22:33:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:29,382 INFO L93 Difference]: Finished difference Result 286 states and 391 transitions. [2022-07-20 22:33:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:33:29,382 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 [2022-07-20 22:33:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:29,383 INFO L225 Difference]: With dead ends: 286 [2022-07-20 22:33:29,384 INFO L226 Difference]: Without dead ends: 263 [2022-07-20 22:33:29,384 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 [2022-07-20 22:33:29,384 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 [2022-07-20 22:33:29,385 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] [2022-07-20 22:33:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-20 22:33:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-07-20 22:33:29,399 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) [2022-07-20 22:33:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 359 transitions. [2022-07-20 22:33:29,401 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 359 transitions. Word has length 45 [2022-07-20 22:33:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:29,401 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 359 transitions. [2022-07-20 22:33:29,401 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) [2022-07-20 22:33:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 359 transitions. [2022-07-20 22:33:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 22:33:29,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:29,402 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] [2022-07-20 22:33:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:33:29,403 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash 270131950, now seen corresponding path program 1 times [2022-07-20 22:33:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490638540] [2022-07-20 22:33:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:29,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:29,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490638540] [2022-07-20 22:33:29,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490638540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:29,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:29,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:33:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698459737] [2022-07-20 22:33:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:33:29,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:33:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:33:29,535 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) [2022-07-20 22:33:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:30,499 INFO L93 Difference]: Finished difference Result 283 states and 381 transitions. [2022-07-20 22:33:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:33:30,499 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 [2022-07-20 22:33:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:30,500 INFO L225 Difference]: With dead ends: 283 [2022-07-20 22:33:30,500 INFO L226 Difference]: Without dead ends: 262 [2022-07-20 22:33:30,501 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 [2022-07-20 22:33:30,501 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 50 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:30,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1444 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:33:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-20 22:33:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-07-20 22:33:30,529 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) [2022-07-20 22:33:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 357 transitions. [2022-07-20 22:33:30,530 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 357 transitions. Word has length 46 [2022-07-20 22:33:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:30,531 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 357 transitions. [2022-07-20 22:33:30,531 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) [2022-07-20 22:33:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 357 transitions. [2022-07-20 22:33:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 22:33:30,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:30,532 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] [2022-07-20 22:33:30,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:33:30,532 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1666913919, now seen corresponding path program 1 times [2022-07-20 22:33:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:30,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685054479] [2022-07-20 22:33:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:30,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:30,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 22:33:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:30,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:30,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685054479] [2022-07-20 22:33:30,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685054479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:30,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:30,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:33:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275523881] [2022-07-20 22:33:30,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:30,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:33:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:33:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:33:30,641 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) [2022-07-20 22:33:32,649 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 [] [2022-07-20 22:33:34,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:34,806 INFO L93 Difference]: Finished difference Result 502 states and 687 transitions. [2022-07-20 22:33:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:33:34,807 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 [2022-07-20 22:33:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:34,808 INFO L225 Difference]: With dead ends: 502 [2022-07-20 22:33:34,808 INFO L226 Difference]: Without dead ends: 262 [2022-07-20 22:33:34,809 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 [2022-07-20 22:33:34,809 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 41 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:34,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1030 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 88 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-20 22:33:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-20 22:33:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2022-07-20 22:33:34,823 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) [2022-07-20 22:33:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 354 transitions. [2022-07-20 22:33:34,825 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 354 transitions. Word has length 47 [2022-07-20 22:33:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:34,825 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 354 transitions. [2022-07-20 22:33:34,825 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) [2022-07-20 22:33:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 354 transitions. [2022-07-20 22:33:34,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 22:33:34,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:34,826 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] [2022-07-20 22:33:34,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:33:34,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:34,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1795358223, now seen corresponding path program 1 times [2022-07-20 22:33:34,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:34,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31430008] [2022-07-20 22:33:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:34,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 22:33:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:35,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31430008] [2022-07-20 22:33:35,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31430008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:35,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:35,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:33:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735407600] [2022-07-20 22:33:35,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:35,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:33:35,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:35,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:33:35,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:33:35,012 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) [2022-07-20 22:33:37,711 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 [] [2022-07-20 22:33:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:37,875 INFO L93 Difference]: Finished difference Result 312 states and 413 transitions. [2022-07-20 22:33:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:33:37,875 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 [2022-07-20 22:33:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:37,877 INFO L225 Difference]: With dead ends: 312 [2022-07-20 22:33:37,877 INFO L226 Difference]: Without dead ends: 259 [2022-07-20 22:33:37,877 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 [2022-07-20 22:33:37,877 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 65 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:37,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1292 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 22:33:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-20 22:33:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-07-20 22:33:37,902 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) [2022-07-20 22:33:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 349 transitions. [2022-07-20 22:33:37,903 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 349 transitions. Word has length 52 [2022-07-20 22:33:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:37,903 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 349 transitions. [2022-07-20 22:33:37,903 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) [2022-07-20 22:33:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 349 transitions. [2022-07-20 22:33:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 22:33:37,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:37,904 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] [2022-07-20 22:33:37,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:33:37,904 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -18191150, now seen corresponding path program 1 times [2022-07-20 22:33:37,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:37,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587931156] [2022-07-20 22:33:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587931156] [2022-07-20 22:33:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587931156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:38,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:38,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883733793] [2022-07-20 22:33:38,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:38,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:38,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:38,095 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) [2022-07-20 22:33:38,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:38,226 INFO L93 Difference]: Finished difference Result 291 states and 389 transitions. [2022-07-20 22:33:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:38,227 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 [2022-07-20 22:33:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:38,228 INFO L225 Difference]: With dead ends: 291 [2022-07-20 22:33:38,228 INFO L226 Difference]: Without dead ends: 177 [2022-07-20 22:33:38,228 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 [2022-07-20 22:33:38,229 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 [2022-07-20 22:33:38,229 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] [2022-07-20 22:33:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-20 22:33:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2022-07-20 22:33:38,239 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) [2022-07-20 22:33:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2022-07-20 22:33:38,240 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 52 [2022-07-20 22:33:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:38,240 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2022-07-20 22:33:38,240 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) [2022-07-20 22:33:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2022-07-20 22:33:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 22:33:38,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:38,241 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] [2022-07-20 22:33:38,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:33:38,241 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1854339953, now seen corresponding path program 1 times [2022-07-20 22:33:38,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118235132] [2022-07-20 22:33:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:38,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:38,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 22:33:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:38,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118235132] [2022-07-20 22:33:38,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118235132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:38,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:38,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:33:38,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462009796] [2022-07-20 22:33:38,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:38,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:33:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:33:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:33:38,392 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) [2022-07-20 22:33:40,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:40,379 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2022-07-20 22:33:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:33:40,380 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 [2022-07-20 22:33:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:40,380 INFO L225 Difference]: With dead ends: 168 [2022-07-20 22:33:40,380 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 22:33:40,381 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 [2022-07-20 22:33:40,381 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 42 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 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, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:40,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 371 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:33:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 22:33:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-20 22:33:40,394 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) [2022-07-20 22:33:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-07-20 22:33:40,395 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 53 [2022-07-20 22:33:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:40,395 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-07-20 22:33:40,395 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) [2022-07-20 22:33:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-07-20 22:33:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 22:33:40,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:40,396 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] [2022-07-20 22:33:40,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:33:40,396 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1084558305, now seen corresponding path program 1 times [2022-07-20 22:33:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373717243] [2022-07-20 22:33:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:40,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 22:33:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:40,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-20 22:33:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:40,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373717243] [2022-07-20 22:33:40,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373717243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:40,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:40,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:33:40,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366411616] [2022-07-20 22:33:40,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:40,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:33:40,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:33:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:33:40,543 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) [2022-07-20 22:33:42,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:43,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:45,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:45,467 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2022-07-20 22:33:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:33:45,467 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 [2022-07-20 22:33:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:45,468 INFO L225 Difference]: With dead ends: 173 [2022-07-20 22:33:45,468 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 22:33:45,469 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 [2022-07-20 22:33:45,469 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 31 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:45,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 361 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-07-20 22:33:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 22:33:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-20 22:33:45,478 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) [2022-07-20 22:33:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2022-07-20 22:33:45,479 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 55 [2022-07-20 22:33:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:45,479 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2022-07-20 22:33:45,479 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) [2022-07-20 22:33:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2022-07-20 22:33:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 22:33:45,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:45,480 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] [2022-07-20 22:33:45,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:33:45,480 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -638228197, now seen corresponding path program 1 times [2022-07-20 22:33:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785605313] [2022-07-20 22:33:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:45,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:45,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-20 22:33:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:33:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:45,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:45,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785605313] [2022-07-20 22:33:45,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785605313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:45,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:45,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 22:33:45,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602317033] [2022-07-20 22:33:45,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:45,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 22:33:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 22:33:45,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:33:45,678 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) [2022-07-20 22:33:47,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:47,313 INFO L93 Difference]: Finished difference Result 211 states and 270 transitions. [2022-07-20 22:33:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:33:47,313 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 [2022-07-20 22:33:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:47,314 INFO L225 Difference]: With dead ends: 211 [2022-07-20 22:33:47,314 INFO L226 Difference]: Without dead ends: 158 [2022-07-20 22:33:47,315 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 [2022-07-20 22:33:47,315 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 46 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:47,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 561 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:33:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-20 22:33:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2022-07-20 22:33:47,326 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) [2022-07-20 22:33:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2022-07-20 22:33:47,326 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 57 [2022-07-20 22:33:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:47,327 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2022-07-20 22:33:47,327 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) [2022-07-20 22:33:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2022-07-20 22:33:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 22:33:47,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:47,328 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] [2022-07-20 22:33:47,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:33:47,328 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:47,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1799191219, now seen corresponding path program 1 times [2022-07-20 22:33:47,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:47,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633129304] [2022-07-20 22:33:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-20 22:33:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:33:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:47,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633129304] [2022-07-20 22:33:47,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633129304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:47,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:47,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:33:47,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557806831] [2022-07-20 22:33:47,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:47,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:33:47,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:33:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:33:47,506 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) [2022-07-20 22:33:48,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:48,846 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2022-07-20 22:33:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:33:48,847 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 [2022-07-20 22:33:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:48,848 INFO L225 Difference]: With dead ends: 164 [2022-07-20 22:33:48,848 INFO L226 Difference]: Without dead ends: 161 [2022-07-20 22:33:48,848 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 [2022-07-20 22:33:48,848 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 31 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:48,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 307 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:33:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-20 22:33:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 142. [2022-07-20 22:33:48,870 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) [2022-07-20 22:33:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 176 transitions. [2022-07-20 22:33:48,871 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 176 transitions. Word has length 58 [2022-07-20 22:33:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:48,872 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 176 transitions. [2022-07-20 22:33:48,872 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) [2022-07-20 22:33:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 176 transitions. [2022-07-20 22:33:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:33:48,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:48,873 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] [2022-07-20 22:33:48,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:33:48,873 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash 297674658, now seen corresponding path program 1 times [2022-07-20 22:33:48,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:48,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433595655] [2022-07-20 22:33:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:49,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-20 22:33:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:49,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:33:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:49,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433595655] [2022-07-20 22:33:49,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433595655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:49,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:49,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:33:49,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472639744] [2022-07-20 22:33:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:49,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:33:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:33:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:33:49,054 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) [2022-07-20 22:33:50,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:52,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:52,686 INFO L93 Difference]: Finished difference Result 280 states and 346 transitions. [2022-07-20 22:33:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:33:52,686 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 [2022-07-20 22:33:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:52,688 INFO L225 Difference]: With dead ends: 280 [2022-07-20 22:33:52,688 INFO L226 Difference]: Without dead ends: 253 [2022-07-20 22:33:52,688 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 [2022-07-20 22:33:52,689 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 62 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:33:52,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 379 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-20 22:33:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-20 22:33:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 248. [2022-07-20 22:33:52,727 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) [2022-07-20 22:33:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 311 transitions. [2022-07-20 22:33:52,729 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 311 transitions. Word has length 60 [2022-07-20 22:33:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:52,729 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 311 transitions. [2022-07-20 22:33:52,729 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) [2022-07-20 22:33:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 311 transitions. [2022-07-20 22:33:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:33:52,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:52,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:33:52,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:33:52,730 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2072682020, now seen corresponding path program 1 times [2022-07-20 22:33:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:52,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477623967] [2022-07-20 22:33:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-20 22:33:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:53,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:33:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:53,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:53,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477623967] [2022-07-20 22:33:53,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477623967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:53,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:53,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:33:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086368573] [2022-07-20 22:33:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:33:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:33:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:33:53,222 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) [2022-07-20 22:33:55,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:57,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:33:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:57,339 INFO L93 Difference]: Finished difference Result 476 states and 599 transitions. [2022-07-20 22:33:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:33:57,339 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 [2022-07-20 22:33:57,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:57,341 INFO L225 Difference]: With dead ends: 476 [2022-07-20 22:33:57,341 INFO L226 Difference]: Without dead ends: 250 [2022-07-20 22:33:57,341 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 [2022-07-20 22:33:57,342 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 7 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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 [2022-07-20 22:33:57,342 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] [2022-07-20 22:33:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-20 22:33:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-07-20 22:33:57,360 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) [2022-07-20 22:33:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 313 transitions. [2022-07-20 22:33:57,361 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 313 transitions. Word has length 60 [2022-07-20 22:33:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:57,361 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 313 transitions. [2022-07-20 22:33:57,361 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) [2022-07-20 22:33:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 313 transitions. [2022-07-20 22:33:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:33:57,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:57,362 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] [2022-07-20 22:33:57,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:33:57,363 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1685978785, now seen corresponding path program 1 times [2022-07-20 22:33:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467247686] [2022-07-20 22:33:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:57,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:33:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:58,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:33:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:33:58,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:58,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467247686] [2022-07-20 22:33:58,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467247686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:33:58,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106956084] [2022-07-20 22:33:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:58,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:33:58,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:33:58,147 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) [2022-07-20 22:33:58,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:33:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 22:33:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:33:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:33:59,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:33:59,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106956084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:59,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:33:59,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-07-20 22:33:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073545208] [2022-07-20 22:33:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:59,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:33:59,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:33:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:33:59,057 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) [2022-07-20 22:33:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:33:59,090 INFO L93 Difference]: Finished difference Result 336 states and 423 transitions. [2022-07-20 22:33:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 22:33:59,091 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 [2022-07-20 22:33:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:33:59,092 INFO L225 Difference]: With dead ends: 336 [2022-07-20 22:33:59,092 INFO L226 Difference]: Without dead ends: 236 [2022-07-20 22:33:59,093 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 [2022-07-20 22:33:59,093 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 [2022-07-20 22:33:59,093 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] [2022-07-20 22:33:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-20 22:33:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-07-20 22:33:59,120 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) [2022-07-20 22:33:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 293 transitions. [2022-07-20 22:33:59,121 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 293 transitions. Word has length 61 [2022-07-20 22:33:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:33:59,121 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 293 transitions. [2022-07-20 22:33:59,121 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) [2022-07-20 22:33:59,121 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 293 transitions. [2022-07-20 22:33:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:33:59,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:33:59,122 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] [2022-07-20 22:33:59,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:33:59,347 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 [2022-07-20 22:33:59,348 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:33:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:33:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1919232474, now seen corresponding path program 1 times [2022-07-20 22:33:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:33:59,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631836871] [2022-07-20 22:33:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:33:59,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:33:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:59,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:33:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:33:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:33:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:33:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:33:59,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:33:59,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631836871] [2022-07-20 22:33:59,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631836871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:33:59,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:33:59,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:33:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461043273] [2022-07-20 22:33:59,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:33:59,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:33:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:33:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:33:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:33:59,638 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) [2022-07-20 22:34:00,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:02,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:04,981 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 [] [2022-07-20 22:34:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:06,032 INFO L93 Difference]: Finished difference Result 310 states and 391 transitions. [2022-07-20 22:34:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:34:06,033 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 [2022-07-20 22:34:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:06,034 INFO L225 Difference]: With dead ends: 310 [2022-07-20 22:34:06,034 INFO L226 Difference]: Without dead ends: 224 [2022-07-20 22:34:06,035 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 [2022-07-20 22:34:06,035 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 98 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:06,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 475 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-07-20 22:34:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-20 22:34:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-07-20 22:34:06,053 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) [2022-07-20 22:34:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 277 transitions. [2022-07-20 22:34:06,053 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 277 transitions. Word has length 65 [2022-07-20 22:34:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:06,054 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 277 transitions. [2022-07-20 22:34:06,054 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) [2022-07-20 22:34:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 277 transitions. [2022-07-20 22:34:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 22:34:06,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:06,055 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] [2022-07-20 22:34:06,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 22:34:06,055 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1018080202, now seen corresponding path program 1 times [2022-07-20 22:34:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:06,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865012093] [2022-07-20 22:34:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:06,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:34:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:06,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:06,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:34:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:06,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865012093] [2022-07-20 22:34:06,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865012093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:06,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:34:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285335995] [2022-07-20 22:34:06,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:34:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:34:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:34:06,316 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) [2022-07-20 22:34:08,325 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 [] [2022-07-20 22:34:10,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:12,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:12,543 INFO L93 Difference]: Finished difference Result 287 states and 351 transitions. [2022-07-20 22:34:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:34:12,543 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 [2022-07-20 22:34:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:12,545 INFO L225 Difference]: With dead ends: 287 [2022-07-20 22:34:12,545 INFO L226 Difference]: Without dead ends: 260 [2022-07-20 22:34:12,545 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 [2022-07-20 22:34:12,545 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 47 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:12,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 830 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-07-20 22:34:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-20 22:34:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2022-07-20 22:34:12,563 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) [2022-07-20 22:34:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 295 transitions. [2022-07-20 22:34:12,564 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 295 transitions. Word has length 67 [2022-07-20 22:34:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:12,564 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 295 transitions. [2022-07-20 22:34:12,565 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) [2022-07-20 22:34:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 295 transitions. [2022-07-20 22:34:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 22:34:12,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:12,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:12,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:34:12,566 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 555821410, now seen corresponding path program 1 times [2022-07-20 22:34:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:12,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776539324] [2022-07-20 22:34:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:12,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:12,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:34:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:12,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:12,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:34:12,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776539324] [2022-07-20 22:34:12,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776539324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:12,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:12,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:34:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80130098] [2022-07-20 22:34:12,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:12,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:34:12,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:34:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:34:12,770 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) [2022-07-20 22:34:14,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:16,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:19,456 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 [] [2022-07-20 22:34:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:19,573 INFO L93 Difference]: Finished difference Result 325 states and 391 transitions. [2022-07-20 22:34:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 22:34:19,573 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 [2022-07-20 22:34:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:19,575 INFO L225 Difference]: With dead ends: 325 [2022-07-20 22:34:19,575 INFO L226 Difference]: Without dead ends: 265 [2022-07-20 22:34:19,575 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 [2022-07-20 22:34:19,576 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 56 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:19,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 418 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-07-20 22:34:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-20 22:34:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2022-07-20 22:34:19,594 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) [2022-07-20 22:34:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 293 transitions. [2022-07-20 22:34:19,595 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 293 transitions. Word has length 66 [2022-07-20 22:34:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:19,595 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 293 transitions. [2022-07-20 22:34:19,595 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) [2022-07-20 22:34:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 293 transitions. [2022-07-20 22:34:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 22:34:19,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:19,596 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] [2022-07-20 22:34:19,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:34:19,597 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -118230121, now seen corresponding path program 1 times [2022-07-20 22:34:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:19,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120601750] [2022-07-20 22:34:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:19,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:34:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:19,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:34:19,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:19,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120601750] [2022-07-20 22:34:19,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120601750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:19,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:19,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 22:34:19,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061713493] [2022-07-20 22:34:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 22:34:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 22:34:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:34:19,831 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) [2022-07-20 22:34:20,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:22,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:23,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:23,370 INFO L93 Difference]: Finished difference Result 336 states and 398 transitions. [2022-07-20 22:34:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:34:23,370 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 [2022-07-20 22:34:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:23,372 INFO L225 Difference]: With dead ends: 336 [2022-07-20 22:34:23,372 INFO L226 Difference]: Without dead ends: 257 [2022-07-20 22:34:23,372 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 [2022-07-20 22:34:23,373 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 44 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 3.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:23,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 815 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-20 22:34:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-07-20 22:34:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 237. [2022-07-20 22:34:23,399 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) [2022-07-20 22:34:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 277 transitions. [2022-07-20 22:34:23,400 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 277 transitions. Word has length 68 [2022-07-20 22:34:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:23,400 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 277 transitions. [2022-07-20 22:34:23,400 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) [2022-07-20 22:34:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 277 transitions. [2022-07-20 22:34:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 22:34:23,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:23,401 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] [2022-07-20 22:34:23,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-20 22:34:23,402 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1748301759, now seen corresponding path program 1 times [2022-07-20 22:34:23,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:23,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40691126] [2022-07-20 22:34:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:23,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:34:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:23,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:23,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:34:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:23,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40691126] [2022-07-20 22:34:23,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40691126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:23,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:23,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 22:34:23,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909529526] [2022-07-20 22:34:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:23,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:34:23,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:34:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:34:23,583 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) [2022-07-20 22:34:25,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:26,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:26,998 INFO L93 Difference]: Finished difference Result 271 states and 314 transitions. [2022-07-20 22:34:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:34:26,998 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 [2022-07-20 22:34:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:26,999 INFO L225 Difference]: With dead ends: 271 [2022-07-20 22:34:26,999 INFO L226 Difference]: Without dead ends: 216 [2022-07-20 22:34:27,000 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 [2022-07-20 22:34:27,000 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 20 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:27,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 349 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-20 22:34:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-20 22:34:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 198. [2022-07-20 22:34:27,015 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) [2022-07-20 22:34:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 226 transitions. [2022-07-20 22:34:27,016 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 226 transitions. Word has length 74 [2022-07-20 22:34:27,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:27,016 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 226 transitions. [2022-07-20 22:34:27,016 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) [2022-07-20 22:34:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 226 transitions. [2022-07-20 22:34:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 22:34:27,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:27,017 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] [2022-07-20 22:34:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 22:34:27,018 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash -452450229, now seen corresponding path program 1 times [2022-07-20 22:34:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:27,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471786135] [2022-07-20 22:34:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:27,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:34:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:27,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:27,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-20 22:34:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:34:27,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471786135] [2022-07-20 22:34:27,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471786135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:27,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:27,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 22:34:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323330747] [2022-07-20 22:34:27,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:27,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:34:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:34:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:34:27,241 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) [2022-07-20 22:34:29,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:31,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:31,381 INFO L93 Difference]: Finished difference Result 220 states and 250 transitions. [2022-07-20 22:34:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:34:31,381 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 [2022-07-20 22:34:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:31,382 INFO L225 Difference]: With dead ends: 220 [2022-07-20 22:34:31,383 INFO L226 Difference]: Without dead ends: 178 [2022-07-20 22:34:31,383 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 [2022-07-20 22:34:31,383 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 59 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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, 4.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:31,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 739 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-20 22:34:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-20 22:34:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-07-20 22:34:31,399 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) [2022-07-20 22:34:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 200 transitions. [2022-07-20 22:34:31,400 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 200 transitions. Word has length 82 [2022-07-20 22:34:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:31,400 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 200 transitions. [2022-07-20 22:34:31,400 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) [2022-07-20 22:34:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 200 transitions. [2022-07-20 22:34:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-20 22:34:31,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:31,401 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] [2022-07-20 22:34:31,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-20 22:34:31,402 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:31,402 INFO L85 PathProgramCache]: Analyzing trace with hash -447625103, now seen corresponding path program 1 times [2022-07-20 22:34:31,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:31,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191422235] [2022-07-20 22:34:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:31,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-20 22:34:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:31,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:31,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-20 22:34:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:34:31,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:31,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191422235] [2022-07-20 22:34:31,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191422235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:34:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615295328] [2022-07-20 22:34:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:31,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:34:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:34:31,932 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) [2022-07-20 22:34:31,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:34:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:34:33,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:34:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:34:33,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:34:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:34:33,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615295328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:34:33,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:34:33,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-07-20 22:34:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605899582] [2022-07-20 22:34:33,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:34:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 22:34:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 22:34:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:34:33,187 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) [2022-07-20 22:34:34,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:36,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:38,291 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 [] [2022-07-20 22:34:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:38,458 INFO L93 Difference]: Finished difference Result 338 states and 383 transitions. [2022-07-20 22:34:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 22:34:38,458 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 [2022-07-20 22:34:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:38,459 INFO L225 Difference]: With dead ends: 338 [2022-07-20 22:34:38,459 INFO L226 Difference]: Without dead ends: 184 [2022-07-20 22:34:38,460 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 [2022-07-20 22:34:38,460 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 66 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s 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, 5.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:38,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 530 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2022-07-20 22:34:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-20 22:34:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-07-20 22:34:38,480 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) [2022-07-20 22:34:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 206 transitions. [2022-07-20 22:34:38,481 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 206 transitions. Word has length 88 [2022-07-20 22:34:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:38,481 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 206 transitions. [2022-07-20 22:34:38,482 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) [2022-07-20 22:34:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 206 transitions. [2022-07-20 22:34:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 22:34:38,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:38,483 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] [2022-07-20 22:34:38,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:34:38,701 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 [2022-07-20 22:34:38,702 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1753567182, now seen corresponding path program 2 times [2022-07-20 22:34:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:38,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210979769] [2022-07-20 22:34:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:38,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:39,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-20 22:34:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:39,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:39,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:39,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 22:34:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:34:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:39,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210979769] [2022-07-20 22:34:39,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210979769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:34:39,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634940466] [2022-07-20 22:34:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:34:39,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:34:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:34:39,380 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) [2022-07-20 22:34:39,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:34:40,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 22:34:40,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:34:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 22:34:40,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:34:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 22:34:40,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:34:40,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634940466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:40,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:34:40,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-20 22:34:40,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557649394] [2022-07-20 22:34:40,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:40,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:34:40,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:34:40,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:34:40,819 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) [2022-07-20 22:34:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:40,861 INFO L93 Difference]: Finished difference Result 308 states and 345 transitions. [2022-07-20 22:34:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:34:40,862 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 [2022-07-20 22:34:40,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:40,863 INFO L225 Difference]: With dead ends: 308 [2022-07-20 22:34:40,863 INFO L226 Difference]: Without dead ends: 186 [2022-07-20 22:34:40,863 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 [2022-07-20 22:34:40,864 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 [2022-07-20 22:34:40,864 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] [2022-07-20 22:34:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-20 22:34:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-07-20 22:34:40,882 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) [2022-07-20 22:34:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2022-07-20 22:34:40,883 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 91 [2022-07-20 22:34:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:40,883 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2022-07-20 22:34:40,883 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) [2022-07-20 22:34:40,884 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2022-07-20 22:34:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 22:34:40,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:40,884 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] [2022-07-20 22:34:40,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:34:41,099 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 [2022-07-20 22:34:41,099 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash -463830121, now seen corresponding path program 1 times [2022-07-20 22:34:41,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168831982] [2022-07-20 22:34:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:41,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 22:34:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:41,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:41,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:41,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-20 22:34:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:34:41,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168831982] [2022-07-20 22:34:41,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168831982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:34:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261707636] [2022-07-20 22:34:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:34:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:34:41,821 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) [2022-07-20 22:34:41,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:34:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:34:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:34:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 22:34:42,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:34:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 22:34:43,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261707636] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:34:43,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:34:43,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 5] total 14 [2022-07-20 22:34:43,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472411384] [2022-07-20 22:34:43,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:43,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:34:43,029 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) [2022-07-20 22:34:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:43,082 INFO L93 Difference]: Finished difference Result 308 states and 343 transitions. [2022-07-20 22:34:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:43,082 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 [2022-07-20 22:34:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:43,083 INFO L225 Difference]: With dead ends: 308 [2022-07-20 22:34:43,083 INFO L226 Difference]: Without dead ends: 188 [2022-07-20 22:34:43,084 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 [2022-07-20 22:34:43,086 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 [2022-07-20 22:34:43,088 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] [2022-07-20 22:34:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-20 22:34:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-07-20 22:34:43,108 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) [2022-07-20 22:34:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 210 transitions. [2022-07-20 22:34:43,108 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 210 transitions. Word has length 92 [2022-07-20 22:34:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:43,109 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 210 transitions. [2022-07-20 22:34:43,109 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) [2022-07-20 22:34:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 210 transitions. [2022-07-20 22:34:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 22:34:43,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:43,110 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] [2022-07-20 22:34:43,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:34:43,331 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 [2022-07-20 22:34:43,331 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash 839553712, now seen corresponding path program 1 times [2022-07-20 22:34:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201704377] [2022-07-20 22:34:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:44,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-20 22:34:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:44,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-20 22:34:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:34:44,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201704377] [2022-07-20 22:34:44,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201704377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:34:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572405921] [2022-07-20 22:34:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:44,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:34:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:34:44,100 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) [2022-07-20 22:34:44,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:34:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 22:34:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:34:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:34:45,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:34:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:34:45,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572405921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:34:45,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:34:45,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-07-20 22:34:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090642917] [2022-07-20 22:34:45,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:34:45,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 22:34:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:45,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 22:34:45,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-20 22:34:45,637 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) [2022-07-20 22:34:47,406 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 [] [2022-07-20 22:34:48,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:49,423 INFO L93 Difference]: Finished difference Result 358 states and 409 transitions. [2022-07-20 22:34:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 22:34:49,424 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 [2022-07-20 22:34:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:49,425 INFO L225 Difference]: With dead ends: 358 [2022-07-20 22:34:49,425 INFO L226 Difference]: Without dead ends: 200 [2022-07-20 22:34:49,425 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 [2022-07-20 22:34:49,426 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 70 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:49,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 823 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 22:34:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-20 22:34:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-07-20 22:34:49,462 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) [2022-07-20 22:34:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2022-07-20 22:34:49,463 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 93 [2022-07-20 22:34:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:49,463 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2022-07-20 22:34:49,464 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) [2022-07-20 22:34:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2022-07-20 22:34:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 22:34:49,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:49,465 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] [2022-07-20 22:34:49,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:34:49,691 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 [2022-07-20 22:34:49,692 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1195309008, now seen corresponding path program 2 times [2022-07-20 22:34:49,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:49,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234385248] [2022-07-20 22:34:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-20 22:34:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 22:34:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:50,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 22:34:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:50,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 22:34:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:34:50,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:50,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234385248] [2022-07-20 22:34:50,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234385248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:34:50,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293408495] [2022-07-20 22:34:50,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:34:50,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:34:50,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:34:50,324 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) [2022-07-20 22:34:50,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process