./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/product-lines/elevator_spec14_productSimulator.cil.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 d3fd4ba6d5d6f8656cafcc266639497265ce714ee15e353bdb887d26cd828a30 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 17:17:35,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 17:17:35,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 17:17:35,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 17:17:35,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 17:17:35,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 17:17:35,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 17:17:35,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 17:17:35,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 17:17:35,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 17:17:35,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 17:17:35,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 17:17:35,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 17:17:35,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 17:17:35,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 17:17:35,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 17:17:35,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 17:17:35,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 17:17:35,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 17:17:35,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 17:17:35,167 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 17:17:35,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 17:17:35,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 17:17:35,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 17:17:35,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 17:17:35,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 17:17:35,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 17:17:35,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 17:17:35,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 17:17:35,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 17:17:35,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 17:17:35,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 17:17:35,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 17:17:35,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 17:17:35,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 17:17:35,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 17:17:35,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 17:17:35,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 17:17:35,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 17:17:35,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 17:17:35,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 17:17:35,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 17:17:35,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 17:17:35,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 17:17:35,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 17:17:35,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 17:17:35,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 17:17:35,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 17:17:35,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 17:17:35,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 17:17:35,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 17:17:35,203 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 17:17:35,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 17:17:35,204 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 17:17:35,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 17:17:35,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 17:17:35,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 17:17:35,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 17:17:35,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 17:17:35,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 17:17:35,205 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 17:17:35,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 17:17:35,205 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 17:17:35,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 17:17:35,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 17:17:35,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 17:17:35,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 17:17:35,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 17:17:35,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 17:17:35,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 17:17:35,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 17:17:35,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 17:17:35,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 17:17:35,207 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 17:17:35,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 17:17:35,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 17:17:35,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3fd4ba6d5d6f8656cafcc266639497265ce714ee15e353bdb887d26cd828a30 [2022-07-13 17:17:35,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 17:17:35,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 17:17:35,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 17:17:35,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 17:17:35,405 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 17:17:35,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c [2022-07-13 17:17:35,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf3db930/b5d748806b86472598356620be7f016f/FLAG8913a5766 [2022-07-13 17:17:35,928 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 17:17:35,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c [2022-07-13 17:17:35,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf3db930/b5d748806b86472598356620be7f016f/FLAG8913a5766 [2022-07-13 17:17:35,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf3db930/b5d748806b86472598356620be7f016f [2022-07-13 17:17:35,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 17:17:35,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 17:17:35,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 17:17:35,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 17:17:35,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 17:17:35,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 05:17:35" (1/1) ... [2022-07-13 17:17:35,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714503db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:35, skipping insertion in model container [2022-07-13 17:17:35,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 05:17:35" (1/1) ... [2022-07-13 17:17:35,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 17:17:36,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 17:17:36,513 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/product-lines/elevator_spec14_productSimulator.cil.c[77005,77018] [2022-07-13 17:17:36,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 17:17:36,520 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 17:17:36,583 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/product-lines/elevator_spec14_productSimulator.cil.c[77005,77018] [2022-07-13 17:17:36,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 17:17:36,609 INFO L208 MainTranslator]: Completed translation [2022-07-13 17:17:36,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36 WrapperNode [2022-07-13 17:17:36,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 17:17:36,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 17:17:36,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 17:17:36,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 17:17:36,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,713 INFO L137 Inliner]: procedures = 107, calls = 375, calls flagged for inlining = 33, calls inlined = 29, statements flattened = 1021 [2022-07-13 17:17:36,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 17:17:36,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 17:17:36,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 17:17:36,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 17:17:36,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 17:17:36,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 17:17:36,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 17:17:36,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 17:17:36,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (1/1) ... [2022-07-13 17:17:36,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 17:17:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:17:36,852 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) [2022-07-13 17:17:36,859 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 [2022-07-13 17:17:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-07-13 17:17:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-07-13 17:17:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-07-13 17:17:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-07-13 17:17:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-07-13 17:17:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-07-13 17:17:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__twothirdsfull [2022-07-13 17:17:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__twothirdsfull [2022-07-13 17:17:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-07-13 17:17:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-07-13 17:17:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__empty [2022-07-13 17:17:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__empty [2022-07-13 17:17:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-07-13 17:17:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-07-13 17:17:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-07-13 17:17:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-07-13 17:17:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-07-13 17:17:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-07-13 17:17:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2022-07-13 17:17:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2022-07-13 17:17:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__before__weight [2022-07-13 17:17:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__before__weight [2022-07-13 17:17:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-07-13 17:17:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-07-13 17:17:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-07-13 17:17:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-07-13 17:17:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-07-13 17:17:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-07-13 17:17:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 17:17:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-07-13 17:17:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-07-13 17:17:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-07-13 17:17:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-07-13 17:17:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-07-13 17:17:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-07-13 17:17:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-07-13 17:17:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-07-13 17:17:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__before__overloaded [2022-07-13 17:17:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__before__overloaded [2022-07-13 17:17:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-07-13 17:17:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-07-13 17:17:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-07-13 17:17:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-07-13 17:17:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-07-13 17:17:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-07-13 17:17:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__weight [2022-07-13 17:17:36,883 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__weight [2022-07-13 17:17:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__executivefloor [2022-07-13 17:17:36,883 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__executivefloor [2022-07-13 17:17:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-07-13 17:17:36,883 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-07-13 17:17:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__executivefloor [2022-07-13 17:17:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__executivefloor [2022-07-13 17:17:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-07-13 17:17:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-07-13 17:17:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-07-13 17:17:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-07-13 17:17:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-07-13 17:17:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-07-13 17:17:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-07-13 17:17:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-07-13 17:17:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 17:17:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-07-13 17:17:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-07-13 17:17:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-07-13 17:17:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-07-13 17:17:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2022-07-13 17:17:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2022-07-13 17:17:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 17:17:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 17:17:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-07-13 17:17:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-07-13 17:17:37,025 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 17:17:37,027 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 17:17:37,721 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 17:17:37,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 17:17:37,731 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 17:17:37,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 05:17:37 BoogieIcfgContainer [2022-07-13 17:17:37,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 17:17:37,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 17:17:37,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 17:17:37,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 17:17:37,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 05:17:35" (1/3) ... [2022-07-13 17:17:37,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1791023e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 05:17:37, skipping insertion in model container [2022-07-13 17:17:37,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:17:36" (2/3) ... [2022-07-13 17:17:37,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1791023e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 05:17:37, skipping insertion in model container [2022-07-13 17:17:37,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 05:17:37" (3/3) ... [2022-07-13 17:17:37,739 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_productSimulator.cil.c [2022-07-13 17:17:37,750 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 17:17:37,750 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 17:17:37,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 17:17:37,816 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@2ae7bbef, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@166c53e1 [2022-07-13 17:17:37,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 17:17:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 651 states, 492 states have (on average 1.6321138211382114) internal successors, (803), 514 states have internal predecessors, (803), 123 states have call successors, (123), 34 states have call predecessors, (123), 34 states have return successors, (123), 119 states have call predecessors, (123), 123 states have call successors, (123) [2022-07-13 17:17:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 17:17:37,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:37,838 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:37,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 490189906, now seen corresponding path program 1 times [2022-07-13 17:17:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:37,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422308674] [2022-07-13 17:17:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:37,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 17:17:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 17:17:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-13 17:17:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 17:17:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 17:17:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 17:17:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:38,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:38,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422308674] [2022-07-13 17:17:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422308674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:38,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:38,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 17:17:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400478033] [2022-07-13 17:17:38,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:38,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 17:17:38,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 17:17:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 17:17:38,266 INFO L87 Difference]: Start difference. First operand has 651 states, 492 states have (on average 1.6321138211382114) internal successors, (803), 514 states have internal predecessors, (803), 123 states have call successors, (123), 34 states have call predecessors, (123), 34 states have return successors, (123), 119 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:40,671 INFO L93 Difference]: Finished difference Result 1399 states and 2285 transitions. [2022-07-13 17:17:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 17:17:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2022-07-13 17:17:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:40,688 INFO L225 Difference]: With dead ends: 1399 [2022-07-13 17:17:40,688 INFO L226 Difference]: Without dead ends: 752 [2022-07-13 17:17:40,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:17:40,697 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 716 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:40,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 2645 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 17:17:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-13 17:17:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 642. [2022-07-13 17:17:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 485 states have (on average 1.620618556701031) internal successors, (786), 506 states have internal predecessors, (786), 123 states have call successors, (123), 34 states have call predecessors, (123), 33 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1031 transitions. [2022-07-13 17:17:40,780 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1031 transitions. Word has length 93 [2022-07-13 17:17:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:40,781 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 1031 transitions. [2022-07-13 17:17:40,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1031 transitions. [2022-07-13 17:17:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 17:17:40,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:40,784 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:40,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 17:17:40,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2135051856, now seen corresponding path program 1 times [2022-07-13 17:17:40,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:40,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292014278] [2022-07-13 17:17:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:40,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 17:17:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 17:17:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 17:17:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 17:17:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-13 17:17:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:40,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292014278] [2022-07-13 17:17:40,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292014278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:40,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:40,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986024082] [2022-07-13 17:17:40,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:40,997 INFO L87 Difference]: Start difference. First operand 642 states and 1031 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:43,191 INFO L93 Difference]: Finished difference Result 1369 states and 2228 transitions. [2022-07-13 17:17:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:17:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 94 [2022-07-13 17:17:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:43,197 INFO L225 Difference]: With dead ends: 1369 [2022-07-13 17:17:43,197 INFO L226 Difference]: Without dead ends: 756 [2022-07-13 17:17:43,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:17:43,200 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 710 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:43,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 2083 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 17:17:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-13 17:17:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-13 17:17:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6168032786885247) internal successors, (789), 509 states have internal predecessors, (789), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1034 transitions. [2022-07-13 17:17:43,245 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1034 transitions. Word has length 94 [2022-07-13 17:17:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:43,245 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1034 transitions. [2022-07-13 17:17:43,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1034 transitions. [2022-07-13 17:17:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 17:17:43,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:43,247 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:43,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 17:17:43,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1741664601, now seen corresponding path program 1 times [2022-07-13 17:17:43,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:43,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542424698] [2022-07-13 17:17:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:43,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 17:17:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 17:17:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-13 17:17:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-13 17:17:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:43,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:43,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542424698] [2022-07-13 17:17:43,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542424698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:43,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:43,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246491650] [2022-07-13 17:17:43,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:43,374 INFO L87 Difference]: Start difference. First operand 646 states and 1034 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:45,641 INFO L93 Difference]: Finished difference Result 1366 states and 2215 transitions. [2022-07-13 17:17:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:17:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 95 [2022-07-13 17:17:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:45,666 INFO L225 Difference]: With dead ends: 1366 [2022-07-13 17:17:45,667 INFO L226 Difference]: Without dead ends: 756 [2022-07-13 17:17:45,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:17:45,681 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 706 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:45,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 2084 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 17:17:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-13 17:17:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-13 17:17:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6147540983606556) internal successors, (788), 509 states have internal predecessors, (788), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1033 transitions. [2022-07-13 17:17:45,713 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1033 transitions. Word has length 95 [2022-07-13 17:17:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:45,713 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1033 transitions. [2022-07-13 17:17:45,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1033 transitions. [2022-07-13 17:17:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-13 17:17:45,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:45,715 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:45,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 17:17:45,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash 91247532, now seen corresponding path program 1 times [2022-07-13 17:17:45,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618893915] [2022-07-13 17:17:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 17:17:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 17:17:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:17:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-13 17:17:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 17:17:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:45,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618893915] [2022-07-13 17:17:45,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618893915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:45,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:45,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017377123] [2022-07-13 17:17:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:45,867 INFO L87 Difference]: Start difference. First operand 646 states and 1033 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:47,894 INFO L93 Difference]: Finished difference Result 1366 states and 2214 transitions. [2022-07-13 17:17:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:17:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 96 [2022-07-13 17:17:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:47,908 INFO L225 Difference]: With dead ends: 1366 [2022-07-13 17:17:47,908 INFO L226 Difference]: Without dead ends: 756 [2022-07-13 17:17:47,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:17:47,911 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 703 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:47,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 2090 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 17:17:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-13 17:17:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-13 17:17:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6127049180327868) internal successors, (787), 509 states have internal predecessors, (787), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1032 transitions. [2022-07-13 17:17:47,940 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1032 transitions. Word has length 96 [2022-07-13 17:17:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:47,941 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1032 transitions. [2022-07-13 17:17:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1032 transitions. [2022-07-13 17:17:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-13 17:17:47,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:47,942 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:47,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 17:17:47,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1465980477, now seen corresponding path program 1 times [2022-07-13 17:17:47,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520123538] [2022-07-13 17:17:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:47,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:47,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:47,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:47,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 17:17:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-13 17:17:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 17:17:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 17:17:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 17:17:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:48,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:48,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520123538] [2022-07-13 17:17:48,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520123538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:48,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:48,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:48,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915861228] [2022-07-13 17:17:48,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:48,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:48,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:48,049 INFO L87 Difference]: Start difference. First operand 646 states and 1032 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:49,827 INFO L93 Difference]: Finished difference Result 1366 states and 2213 transitions. [2022-07-13 17:17:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:17:49,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 97 [2022-07-13 17:17:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:49,842 INFO L225 Difference]: With dead ends: 1366 [2022-07-13 17:17:49,842 INFO L226 Difference]: Without dead ends: 756 [2022-07-13 17:17:49,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:17:49,845 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 700 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:49,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 2086 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 17:17:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-13 17:17:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-13 17:17:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.610655737704918) internal successors, (786), 509 states have internal predecessors, (786), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1031 transitions. [2022-07-13 17:17:49,872 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1031 transitions. Word has length 97 [2022-07-13 17:17:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:49,872 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1031 transitions. [2022-07-13 17:17:49,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1031 transitions. [2022-07-13 17:17:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-13 17:17:49,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:49,874 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:49,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 17:17:49,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash -743370488, now seen corresponding path program 1 times [2022-07-13 17:17:49,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130089448] [2022-07-13 17:17:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 17:17:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 17:17:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 17:17:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 17:17:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-13 17:17:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:49,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130089448] [2022-07-13 17:17:49,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130089448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:49,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:49,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:49,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877315233] [2022-07-13 17:17:49,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:50,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:50,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:50,001 INFO L87 Difference]: Start difference. First operand 646 states and 1031 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:51,767 INFO L93 Difference]: Finished difference Result 1366 states and 2212 transitions. [2022-07-13 17:17:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:17:51,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 98 [2022-07-13 17:17:51,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:51,772 INFO L225 Difference]: With dead ends: 1366 [2022-07-13 17:17:51,772 INFO L226 Difference]: Without dead ends: 756 [2022-07-13 17:17:51,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:17:51,774 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 697 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:51,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2086 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 17:17:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-13 17:17:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-13 17:17:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6086065573770492) internal successors, (785), 509 states have internal predecessors, (785), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1030 transitions. [2022-07-13 17:17:51,801 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1030 transitions. Word has length 98 [2022-07-13 17:17:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:51,801 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1030 transitions. [2022-07-13 17:17:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1030 transitions. [2022-07-13 17:17:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 17:17:51,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:51,803 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 17:17:51,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1934740703, now seen corresponding path program 1 times [2022-07-13 17:17:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:51,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589108846] [2022-07-13 17:17:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:51,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:17:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 17:17:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-13 17:17:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-13 17:17:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-13 17:17:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:51,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589108846] [2022-07-13 17:17:51,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589108846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:51,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:51,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462639166] [2022-07-13 17:17:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:51,915 INFO L87 Difference]: Start difference. First operand 646 states and 1030 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:54,170 INFO L93 Difference]: Finished difference Result 1391 states and 2256 transitions. [2022-07-13 17:17:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 17:17:54,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 99 [2022-07-13 17:17:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:54,200 INFO L225 Difference]: With dead ends: 1391 [2022-07-13 17:17:54,200 INFO L226 Difference]: Without dead ends: 785 [2022-07-13 17:17:54,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 17:17:54,205 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 775 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:54,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1879 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 17:17:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-13 17:17:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-13 17:17:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.6055226824457594) internal successors, (814), 528 states have internal predecessors, (814), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1059 transitions. [2022-07-13 17:17:54,235 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1059 transitions. Word has length 99 [2022-07-13 17:17:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:54,235 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1059 transitions. [2022-07-13 17:17:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1059 transitions. [2022-07-13 17:17:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-13 17:17:54,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:54,238 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:54,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 17:17:54,239 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1564590535, now seen corresponding path program 1 times [2022-07-13 17:17:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:54,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175886366] [2022-07-13 17:17:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:17:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 17:17:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 17:17:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 17:17:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-13 17:17:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:54,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:54,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175886366] [2022-07-13 17:17:54,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175886366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:54,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:54,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:54,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118976359] [2022-07-13 17:17:54,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:54,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:54,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:54,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:54,400 INFO L87 Difference]: Start difference. First operand 666 states and 1059 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:56,352 INFO L93 Difference]: Finished difference Result 1375 states and 2207 transitions. [2022-07-13 17:17:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:17:56,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 100 [2022-07-13 17:17:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:56,355 INFO L225 Difference]: With dead ends: 1375 [2022-07-13 17:17:56,356 INFO L226 Difference]: Without dead ends: 785 [2022-07-13 17:17:56,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:17:56,358 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 750 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:56,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1877 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 17:17:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-13 17:17:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-13 17:17:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.5956607495069033) internal successors, (809), 528 states have internal predecessors, (809), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1054 transitions. [2022-07-13 17:17:56,392 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1054 transitions. Word has length 100 [2022-07-13 17:17:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:56,393 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1054 transitions. [2022-07-13 17:17:56,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1054 transitions. [2022-07-13 17:17:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-13 17:17:56,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:56,395 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:56,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 17:17:56,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash -55367388, now seen corresponding path program 1 times [2022-07-13 17:17:56,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:56,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701804372] [2022-07-13 17:17:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:17:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 17:17:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 17:17:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-13 17:17:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-13 17:17:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:56,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701804372] [2022-07-13 17:17:56,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701804372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:56,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:56,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:56,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978747217] [2022-07-13 17:17:56,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:56,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:56,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:56,535 INFO L87 Difference]: Start difference. First operand 666 states and 1054 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:17:58,675 INFO L93 Difference]: Finished difference Result 1375 states and 2202 transitions. [2022-07-13 17:17:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:17:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 101 [2022-07-13 17:17:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:17:58,679 INFO L225 Difference]: With dead ends: 1375 [2022-07-13 17:17:58,679 INFO L226 Difference]: Without dead ends: 785 [2022-07-13 17:17:58,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:17:58,681 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 749 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:17:58,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1877 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 17:17:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-13 17:17:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-13 17:17:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.5857988165680474) internal successors, (804), 528 states have internal predecessors, (804), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:17:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1049 transitions. [2022-07-13 17:17:58,708 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1049 transitions. Word has length 101 [2022-07-13 17:17:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:17:58,709 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1049 transitions. [2022-07-13 17:17:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:17:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1049 transitions. [2022-07-13 17:17:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-13 17:17:58,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:17:58,710 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:17:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 17:17:58,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:17:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:17:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1764660052, now seen corresponding path program 1 times [2022-07-13 17:17:58,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:17:58,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106476003] [2022-07-13 17:17:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:17:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:17:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:17:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:17:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:17:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:17:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:17:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:17:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:17:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-13 17:17:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 17:17:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:17:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-13 17:17:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-13 17:17:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:17:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:17:58,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:17:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106476003] [2022-07-13 17:17:58,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106476003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:17:58,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:17:58,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:17:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796048678] [2022-07-13 17:17:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:17:58,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:17:58,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:17:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:17:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:17:58,830 INFO L87 Difference]: Start difference. First operand 666 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:00,983 INFO L93 Difference]: Finished difference Result 1375 states and 2197 transitions. [2022-07-13 17:18:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:18:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 102 [2022-07-13 17:18:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:00,987 INFO L225 Difference]: With dead ends: 1375 [2022-07-13 17:18:00,988 INFO L226 Difference]: Without dead ends: 785 [2022-07-13 17:18:00,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:18:00,990 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 748 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:00,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 1881 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 17:18:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-13 17:18:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-13 17:18:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 528 states have internal predecessors, (799), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:18:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1044 transitions. [2022-07-13 17:18:01,031 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1044 transitions. Word has length 102 [2022-07-13 17:18:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:01,031 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1044 transitions. [2022-07-13 17:18:01,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1044 transitions. [2022-07-13 17:18:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-13 17:18:01,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:01,033 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:01,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 17:18:01,033 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -221028659, now seen corresponding path program 1 times [2022-07-13 17:18:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:01,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624201982] [2022-07-13 17:18:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-13 17:18:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-13 17:18:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-13 17:18:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-13 17:18:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:01,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:01,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624201982] [2022-07-13 17:18:01,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624201982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:01,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:01,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 17:18:01,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652913463] [2022-07-13 17:18:01,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:01,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 17:18:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 17:18:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:18:01,218 INFO L87 Difference]: Start difference. First operand 666 states and 1044 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:03,641 INFO L93 Difference]: Finished difference Result 1410 states and 2245 transitions. [2022-07-13 17:18:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 17:18:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 102 [2022-07-13 17:18:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:03,645 INFO L225 Difference]: With dead ends: 1410 [2022-07-13 17:18:03,645 INFO L226 Difference]: Without dead ends: 826 [2022-07-13 17:18:03,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-13 17:18:03,647 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 762 mSDsluCounter, 2334 mSDsCounter, 0 mSdLazyCounter, 3716 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:03,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 3290 Invalid, 3879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3716 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 17:18:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-07-13 17:18:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 670. [2022-07-13 17:18:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 511 states have (on average 1.5714285714285714) internal successors, (803), 532 states have internal predecessors, (803), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:18:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1048 transitions. [2022-07-13 17:18:03,674 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1048 transitions. Word has length 102 [2022-07-13 17:18:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:03,675 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1048 transitions. [2022-07-13 17:18:03,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1048 transitions. [2022-07-13 17:18:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 17:18:03,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:03,676 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:03,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 17:18:03,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1948362391, now seen corresponding path program 1 times [2022-07-13 17:18:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:03,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111741803] [2022-07-13 17:18:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 17:18:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-13 17:18:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 17:18:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 17:18:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:03,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:03,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111741803] [2022-07-13 17:18:03,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111741803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:03,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:03,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:18:03,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754470361] [2022-07-13 17:18:03,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:03,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:18:03,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:03,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:18:03,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:18:03,815 INFO L87 Difference]: Start difference. First operand 670 states and 1048 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:05,485 INFO L93 Difference]: Finished difference Result 1385 states and 2201 transitions. [2022-07-13 17:18:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:18:05,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 103 [2022-07-13 17:18:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:05,489 INFO L225 Difference]: With dead ends: 1385 [2022-07-13 17:18:05,489 INFO L226 Difference]: Without dead ends: 791 [2022-07-13 17:18:05,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 17:18:05,491 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 747 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:05,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1881 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 17:18:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-07-13 17:18:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 670. [2022-07-13 17:18:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 511 states have (on average 1.5616438356164384) internal successors, (798), 532 states have internal predecessors, (798), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:18:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1043 transitions. [2022-07-13 17:18:05,518 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1043 transitions. Word has length 103 [2022-07-13 17:18:05,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:05,518 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1043 transitions. [2022-07-13 17:18:05,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1043 transitions. [2022-07-13 17:18:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 17:18:05,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:05,520 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:05,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 17:18:05,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:05,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2003716070, now seen corresponding path program 1 times [2022-07-13 17:18:05,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:05,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913485341] [2022-07-13 17:18:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 17:18:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-13 17:18:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-13 17:18:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 17:18:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:05,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913485341] [2022-07-13 17:18:05,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913485341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:05,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:05,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 17:18:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658153222] [2022-07-13 17:18:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:05,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 17:18:05,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 17:18:05,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:18:05,676 INFO L87 Difference]: Start difference. First operand 670 states and 1043 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:07,918 INFO L93 Difference]: Finished difference Result 1418 states and 2244 transitions. [2022-07-13 17:18:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 17:18:07,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 103 [2022-07-13 17:18:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:07,932 INFO L225 Difference]: With dead ends: 1418 [2022-07-13 17:18:07,933 INFO L226 Difference]: Without dead ends: 832 [2022-07-13 17:18:07,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-13 17:18:07,937 INFO L413 NwaCegarLoop]: 949 mSDtfsCounter, 764 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 3659 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:07,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 3259 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3659 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 17:18:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-07-13 17:18:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 676. [2022-07-13 17:18:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 517 states have (on average 1.5551257253384914) internal successors, (804), 538 states have internal predecessors, (804), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:18:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1049 transitions. [2022-07-13 17:18:08,021 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1049 transitions. Word has length 103 [2022-07-13 17:18:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:08,029 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 1049 transitions. [2022-07-13 17:18:08,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1049 transitions. [2022-07-13 17:18:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 17:18:08,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:08,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:08,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 17:18:08,032 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2083404911, now seen corresponding path program 1 times [2022-07-13 17:18:08,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:08,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466167713] [2022-07-13 17:18:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 17:18:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 17:18:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 17:18:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-13 17:18:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:08,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466167713] [2022-07-13 17:18:08,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466167713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:08,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:08,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 17:18:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155138938] [2022-07-13 17:18:08,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:08,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 17:18:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 17:18:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:18:08,176 INFO L87 Difference]: Start difference. First operand 676 states and 1049 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:10,417 INFO L93 Difference]: Finished difference Result 1415 states and 2233 transitions. [2022-07-13 17:18:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 17:18:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 104 [2022-07-13 17:18:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:10,421 INFO L225 Difference]: With dead ends: 1415 [2022-07-13 17:18:10,421 INFO L226 Difference]: Without dead ends: 829 [2022-07-13 17:18:10,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-13 17:18:10,423 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 775 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 3614 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 3774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:10,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 3334 Invalid, 3774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3614 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 17:18:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-13 17:18:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 687. [2022-07-13 17:18:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 525 states have (on average 1.5523809523809524) internal successors, (815), 548 states have internal predecessors, (815), 124 states have call successors, (124), 36 states have call predecessors, (124), 37 states have return successors, (125), 119 states have call predecessors, (125), 123 states have call successors, (125) [2022-07-13 17:18:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1064 transitions. [2022-07-13 17:18:10,453 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1064 transitions. Word has length 104 [2022-07-13 17:18:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:10,453 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1064 transitions. [2022-07-13 17:18:10,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1064 transitions. [2022-07-13 17:18:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 17:18:10,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:10,454 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:10,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 17:18:10,455 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1957409166, now seen corresponding path program 1 times [2022-07-13 17:18:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797885952] [2022-07-13 17:18:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 17:18:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 17:18:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 17:18:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-13 17:18:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797885952] [2022-07-13 17:18:10,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797885952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:10,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:10,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 17:18:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570126828] [2022-07-13 17:18:10,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:10,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 17:18:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 17:18:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:18:10,570 INFO L87 Difference]: Start difference. First operand 687 states and 1064 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:12,884 INFO L93 Difference]: Finished difference Result 1447 states and 2275 transitions. [2022-07-13 17:18:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 17:18:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 104 [2022-07-13 17:18:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:12,887 INFO L225 Difference]: With dead ends: 1447 [2022-07-13 17:18:12,887 INFO L226 Difference]: Without dead ends: 855 [2022-07-13 17:18:12,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-13 17:18:12,892 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 760 mSDsluCounter, 2314 mSDsCounter, 0 mSdLazyCounter, 3648 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 3264 SdHoareTripleChecker+Invalid, 3814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:12,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 3264 Invalid, 3814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3648 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 17:18:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-13 17:18:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 695. [2022-07-13 17:18:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 533 states have (on average 1.5422138836772983) internal successors, (822), 556 states have internal predecessors, (822), 124 states have call successors, (124), 36 states have call predecessors, (124), 37 states have return successors, (125), 119 states have call predecessors, (125), 123 states have call successors, (125) [2022-07-13 17:18:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1071 transitions. [2022-07-13 17:18:12,986 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1071 transitions. Word has length 104 [2022-07-13 17:18:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:12,987 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1071 transitions. [2022-07-13 17:18:12,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1071 transitions. [2022-07-13 17:18:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 17:18:12,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:12,999 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:12,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 17:18:12,999 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1803055022, now seen corresponding path program 1 times [2022-07-13 17:18:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839120576] [2022-07-13 17:18:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 17:18:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 17:18:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 17:18:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-13 17:18:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:13,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839120576] [2022-07-13 17:18:13,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839120576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:13,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:13,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:18:13,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981314082] [2022-07-13 17:18:13,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:13,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:18:13,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:13,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:18:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:18:13,136 INFO L87 Difference]: Start difference. First operand 695 states and 1071 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:14,773 INFO L93 Difference]: Finished difference Result 1481 states and 2309 transitions. [2022-07-13 17:18:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:18:14,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 104 [2022-07-13 17:18:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:14,777 INFO L225 Difference]: With dead ends: 1481 [2022-07-13 17:18:14,777 INFO L226 Difference]: Without dead ends: 802 [2022-07-13 17:18:14,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:18:14,779 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 697 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:14,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2013 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 17:18:14,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-07-13 17:18:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 676. [2022-07-13 17:18:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 517 states have (on average 1.5454545454545454) internal successors, (799), 538 states have internal predecessors, (799), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:18:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1044 transitions. [2022-07-13 17:18:14,810 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1044 transitions. Word has length 104 [2022-07-13 17:18:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:14,811 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 1044 transitions. [2022-07-13 17:18:14,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1044 transitions. [2022-07-13 17:18:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-13 17:18:14,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:14,812 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:14,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 17:18:14,812 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash -112007701, now seen corresponding path program 1 times [2022-07-13 17:18:14,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:14,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659094496] [2022-07-13 17:18:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:14,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 17:18:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 17:18:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-13 17:18:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 17:18:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:14,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:14,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659094496] [2022-07-13 17:18:14,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659094496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:14,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:14,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 17:18:14,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079844864] [2022-07-13 17:18:14,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 17:18:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 17:18:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:18:14,931 INFO L87 Difference]: Start difference. First operand 676 states and 1044 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:17,202 INFO L93 Difference]: Finished difference Result 1428 states and 2234 transitions. [2022-07-13 17:18:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 17:18:17,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 105 [2022-07-13 17:18:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:17,206 INFO L225 Difference]: With dead ends: 1428 [2022-07-13 17:18:17,206 INFO L226 Difference]: Without dead ends: 835 [2022-07-13 17:18:17,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-13 17:18:17,209 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 741 mSDsluCounter, 2275 mSDsCounter, 0 mSdLazyCounter, 3616 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 3616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:17,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 3215 Invalid, 3780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 3616 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 17:18:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-07-13 17:18:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 686. [2022-07-13 17:18:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 527 states have (on average 1.5351043643263758) internal successors, (809), 548 states have internal predecessors, (809), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:18:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1054 transitions. [2022-07-13 17:18:17,237 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1054 transitions. Word has length 105 [2022-07-13 17:18:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:17,237 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1054 transitions. [2022-07-13 17:18:17,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1054 transitions. [2022-07-13 17:18:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 17:18:17,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:17,238 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:17,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 17:18:17,239 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash -358030363, now seen corresponding path program 1 times [2022-07-13 17:18:17,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:17,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800119545] [2022-07-13 17:18:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 17:18:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-13 17:18:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-13 17:18:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:17,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:17,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800119545] [2022-07-13 17:18:17,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800119545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:17,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:17,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:18:17,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437261169] [2022-07-13 17:18:17,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:17,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:18:17,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:18:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:18:17,372 INFO L87 Difference]: Start difference. First operand 686 states and 1054 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:19,366 INFO L93 Difference]: Finished difference Result 1424 states and 2222 transitions. [2022-07-13 17:18:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 17:18:19,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 106 [2022-07-13 17:18:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:19,370 INFO L225 Difference]: With dead ends: 1424 [2022-07-13 17:18:19,370 INFO L226 Difference]: Without dead ends: 805 [2022-07-13 17:18:19,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 17:18:19,372 INFO L413 NwaCegarLoop]: 945 mSDtfsCounter, 761 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1863 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:19,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1863 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 17:18:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-07-13 17:18:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 686. [2022-07-13 17:18:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 527 states have (on average 1.5275142314990513) internal successors, (805), 548 states have internal predecessors, (805), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 17:18:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1050 transitions. [2022-07-13 17:18:19,398 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1050 transitions. Word has length 106 [2022-07-13 17:18:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:19,399 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1050 transitions. [2022-07-13 17:18:19,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 17:18:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1050 transitions. [2022-07-13 17:18:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 17:18:19,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:19,400 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:19,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 17:18:19,400 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:19,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:19,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1997774887, now seen corresponding path program 1 times [2022-07-13 17:18:19,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:19,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850896205] [2022-07-13 17:18:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:19,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-13 17:18:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-13 17:18:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-13 17:18:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:19,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:19,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850896205] [2022-07-13 17:18:19,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850896205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:19,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:19,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 17:18:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990475250] [2022-07-13 17:18:19,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 17:18:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 17:18:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 17:18:19,523 INFO L87 Difference]: Start difference. First operand 686 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:22,289 INFO L93 Difference]: Finished difference Result 2167 states and 3405 transitions. [2022-07-13 17:18:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:18:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 106 [2022-07-13 17:18:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:22,296 INFO L225 Difference]: With dead ends: 2167 [2022-07-13 17:18:22,296 INFO L226 Difference]: Without dead ends: 1576 [2022-07-13 17:18:22,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:18:22,299 INFO L413 NwaCegarLoop]: 1029 mSDtfsCounter, 2189 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:22,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2324 Valid, 1588 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 17:18:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-07-13 17:18:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1339. [2022-07-13 17:18:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1034 states have (on average 1.5328820116054158) internal successors, (1585), 1072 states have internal predecessors, (1585), 235 states have call successors, (235), 71 states have call predecessors, (235), 69 states have return successors, (239), 228 states have call predecessors, (239), 233 states have call successors, (239) [2022-07-13 17:18:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2059 transitions. [2022-07-13 17:18:22,359 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2059 transitions. Word has length 106 [2022-07-13 17:18:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:22,359 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 2059 transitions. [2022-07-13 17:18:22,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2059 transitions. [2022-07-13 17:18:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-13 17:18:22,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:22,361 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:22,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 17:18:22,362 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash 502711325, now seen corresponding path program 1 times [2022-07-13 17:18:22,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:22,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016374228] [2022-07-13 17:18:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:22,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 17:18:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 17:18:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-13 17:18:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-13 17:18:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-13 17:18:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 17:18:22,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:22,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016374228] [2022-07-13 17:18:22,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016374228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:22,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:22,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 17:18:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976470497] [2022-07-13 17:18:22,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:22,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 17:18:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 17:18:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 17:18:22,548 INFO L87 Difference]: Start difference. First operand 1339 states and 2059 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:26,003 INFO L93 Difference]: Finished difference Result 4118 states and 6618 transitions. [2022-07-13 17:18:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:18:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 107 [2022-07-13 17:18:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:26,014 INFO L225 Difference]: With dead ends: 4118 [2022-07-13 17:18:26,014 INFO L226 Difference]: Without dead ends: 2951 [2022-07-13 17:18:26,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:18:26,017 INFO L413 NwaCegarLoop]: 1008 mSDtfsCounter, 2169 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:26,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2291 Valid, 1607 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-13 17:18:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-07-13 17:18:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2475. [2022-07-13 17:18:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 1892 states have (on average 1.5602536997885834) internal successors, (2952), 1965 states have internal predecessors, (2952), 453 states have call successors, (453), 133 states have call predecessors, (453), 129 states have return successors, (506), 437 states have call predecessors, (506), 449 states have call successors, (506) [2022-07-13 17:18:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 3911 transitions. [2022-07-13 17:18:26,154 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 3911 transitions. Word has length 107 [2022-07-13 17:18:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:26,155 INFO L495 AbstractCegarLoop]: Abstraction has 2475 states and 3911 transitions. [2022-07-13 17:18:26,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-13 17:18:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 3911 transitions. [2022-07-13 17:18:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-13 17:18:26,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:26,161 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:26,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 17:18:26,161 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1312417806, now seen corresponding path program 1 times [2022-07-13 17:18:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:26,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916354539] [2022-07-13 17:18:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 17:18:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-13 17:18:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-13 17:18:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-13 17:18:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 17:18:26,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916354539] [2022-07-13 17:18:26,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916354539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:26,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:26,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 17:18:26,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367723797] [2022-07-13 17:18:26,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:26,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 17:18:26,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 17:18:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:18:26,480 INFO L87 Difference]: Start difference. First operand 2475 states and 3911 transitions. Second operand has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 8 states have internal predecessors, (98), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-13 17:18:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:31,216 INFO L93 Difference]: Finished difference Result 5728 states and 9470 transitions. [2022-07-13 17:18:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 17:18:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 8 states have internal predecessors, (98), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 151 [2022-07-13 17:18:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:31,230 INFO L225 Difference]: With dead ends: 5728 [2022-07-13 17:18:31,230 INFO L226 Difference]: Without dead ends: 3424 [2022-07-13 17:18:31,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-07-13 17:18:31,238 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 3669 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 6537 mSolverCounterSat, 1530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3686 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 8067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1530 IncrementalHoareTripleChecker+Valid, 6537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:31,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3686 Valid, 3257 Invalid, 8067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1530 Valid, 6537 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-13 17:18:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2022-07-13 17:18:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 2513. [2022-07-13 17:18:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 1921 states have (on average 1.5549193128578864) internal successors, (2987), 1998 states have internal predecessors, (2987), 447 states have call successors, (447), 134 states have call predecessors, (447), 144 states have return successors, (551), 441 states have call predecessors, (551), 443 states have call successors, (551) [2022-07-13 17:18:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3985 transitions. [2022-07-13 17:18:31,449 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3985 transitions. Word has length 151 [2022-07-13 17:18:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:31,449 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3985 transitions. [2022-07-13 17:18:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 8 states have internal predecessors, (98), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-13 17:18:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3985 transitions. [2022-07-13 17:18:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 17:18:31,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:31,456 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:31,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 17:18:31,456 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash 449178967, now seen corresponding path program 1 times [2022-07-13 17:18:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:31,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674382244] [2022-07-13 17:18:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:31,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 17:18:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 17:18:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 17:18:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 17:18:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-13 17:18:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-13 17:18:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-07-13 17:18:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-13 17:18:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:31,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674382244] [2022-07-13 17:18:31,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674382244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:18:31,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232855298] [2022-07-13 17:18:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:31,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:18:31,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:18:31,762 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) [2022-07-13 17:18:31,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 17:18:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:31,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 17:18:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:18:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 17:18:32,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:18:32,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232855298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:32,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:18:32,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2022-07-13 17:18:32,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875141949] [2022-07-13 17:18:32,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:32,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:18:32,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:18:32,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-07-13 17:18:32,195 INFO L87 Difference]: Start difference. First operand 2513 states and 3985 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:32,785 INFO L93 Difference]: Finished difference Result 4884 states and 7974 transitions. [2022-07-13 17:18:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:18:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2022-07-13 17:18:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:32,797 INFO L225 Difference]: With dead ends: 4884 [2022-07-13 17:18:32,797 INFO L226 Difference]: Without dead ends: 2545 [2022-07-13 17:18:32,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-07-13 17:18:32,805 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 925 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:32,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 2415 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 17:18:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2022-07-13 17:18:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2545. [2022-07-13 17:18:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 1949 states have (on average 1.5572088250384812) internal successors, (3035), 2026 states have internal predecessors, (3035), 447 states have call successors, (447), 138 states have call predecessors, (447), 148 states have return successors, (555), 441 states have call predecessors, (555), 443 states have call successors, (555) [2022-07-13 17:18:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 4037 transitions. [2022-07-13 17:18:33,015 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 4037 transitions. Word has length 157 [2022-07-13 17:18:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:33,016 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 4037 transitions. [2022-07-13 17:18:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 4037 transitions. [2022-07-13 17:18:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 17:18:33,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:33,022 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:33,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 17:18:33,231 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,SelfDestructingSolverStorable21 [2022-07-13 17:18:33,232 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash -338987438, now seen corresponding path program 1 times [2022-07-13 17:18:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242417448] [2022-07-13 17:18:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 17:18:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 17:18:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 17:18:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 17:18:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-13 17:18:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-13 17:18:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-13 17:18:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-13 17:18:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:33,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242417448] [2022-07-13 17:18:33,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242417448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:18:33,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791727847] [2022-07-13 17:18:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:33,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:18:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:18:33,493 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) [2022-07-13 17:18:33,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 17:18:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:33,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 17:18:33,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:18:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-13 17:18:33,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:18:33,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791727847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:33,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:18:33,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-07-13 17:18:33,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957248002] [2022-07-13 17:18:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:33,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:18:33,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:18:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:18:33,861 INFO L87 Difference]: Start difference. First operand 2545 states and 4037 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:34,347 INFO L93 Difference]: Finished difference Result 4948 states and 8066 transitions. [2022-07-13 17:18:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:18:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 160 [2022-07-13 17:18:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:34,357 INFO L225 Difference]: With dead ends: 4948 [2022-07-13 17:18:34,357 INFO L226 Difference]: Without dead ends: 2577 [2022-07-13 17:18:34,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:18:34,364 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 923 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:34,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 2415 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 17:18:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2022-07-13 17:18:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2022-07-13 17:18:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 1977 states have (on average 1.5594334850784015) internal successors, (3083), 2054 states have internal predecessors, (3083), 447 states have call successors, (447), 142 states have call predecessors, (447), 152 states have return successors, (559), 441 states have call predecessors, (559), 443 states have call successors, (559) [2022-07-13 17:18:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4089 transitions. [2022-07-13 17:18:34,577 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4089 transitions. Word has length 160 [2022-07-13 17:18:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:34,577 INFO L495 AbstractCegarLoop]: Abstraction has 2577 states and 4089 transitions. [2022-07-13 17:18:34,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4089 transitions. [2022-07-13 17:18:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-13 17:18:34,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:34,582 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:34,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 17:18:34,799 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,SelfDestructingSolverStorable22 [2022-07-13 17:18:34,799 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1335044211, now seen corresponding path program 1 times [2022-07-13 17:18:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954762385] [2022-07-13 17:18:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:34,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 17:18:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 17:18:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 17:18:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 17:18:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-13 17:18:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-13 17:18:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-07-13 17:18:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 17:18:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:35,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954762385] [2022-07-13 17:18:35,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954762385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:18:35,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685574382] [2022-07-13 17:18:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:35,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:18:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:18:35,076 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) [2022-07-13 17:18:35,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 17:18:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:35,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 17:18:35,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:18:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-13 17:18:35,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:18:35,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685574382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:35,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:18:35,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-07-13 17:18:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760395025] [2022-07-13 17:18:35,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:18:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:18:35,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:18:35,451 INFO L87 Difference]: Start difference. First operand 2577 states and 4089 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:35,982 INFO L93 Difference]: Finished difference Result 5012 states and 8158 transitions. [2022-07-13 17:18:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:18:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2022-07-13 17:18:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:35,992 INFO L225 Difference]: With dead ends: 5012 [2022-07-13 17:18:35,992 INFO L226 Difference]: Without dead ends: 2609 [2022-07-13 17:18:35,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:18:36,000 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 902 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:36,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 2415 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 17:18:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2022-07-13 17:18:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2609. [2022-07-13 17:18:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2005 states have (on average 1.5615960099750623) internal successors, (3131), 2082 states have internal predecessors, (3131), 447 states have call successors, (447), 146 states have call predecessors, (447), 156 states have return successors, (563), 441 states have call predecessors, (563), 443 states have call successors, (563) [2022-07-13 17:18:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 4141 transitions. [2022-07-13 17:18:36,198 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 4141 transitions. Word has length 163 [2022-07-13 17:18:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:36,198 INFO L495 AbstractCegarLoop]: Abstraction has 2609 states and 4141 transitions. [2022-07-13 17:18:36,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 4141 transitions. [2022-07-13 17:18:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-13 17:18:36,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:36,204 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:36,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 17:18:36,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:18:36,419 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1369823516, now seen corresponding path program 1 times [2022-07-13 17:18:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:36,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517180095] [2022-07-13 17:18:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:36,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 17:18:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 17:18:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 17:18:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 17:18:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 17:18:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 17:18:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-13 17:18:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-13 17:18:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-13 17:18:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 17:18:36,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517180095] [2022-07-13 17:18:36,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517180095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:36,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:36,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 17:18:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622100626] [2022-07-13 17:18:36,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 17:18:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 17:18:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 17:18:36,777 INFO L87 Difference]: Start difference. First operand 2609 states and 4141 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-13 17:18:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:42,111 INFO L93 Difference]: Finished difference Result 4687 states and 7659 transitions. [2022-07-13 17:18:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 17:18:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 167 [2022-07-13 17:18:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:42,122 INFO L225 Difference]: With dead ends: 4687 [2022-07-13 17:18:42,122 INFO L226 Difference]: Without dead ends: 3475 [2022-07-13 17:18:42,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-07-13 17:18:42,125 INFO L413 NwaCegarLoop]: 1645 mSDtfsCounter, 2865 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 1388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2968 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 3800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1388 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:42,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2968 Valid, 2424 Invalid, 3800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1388 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-07-13 17:18:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2022-07-13 17:18:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2609. [2022-07-13 17:18:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2005 states have (on average 1.5596009975062344) internal successors, (3127), 2082 states have internal predecessors, (3127), 447 states have call successors, (447), 146 states have call predecessors, (447), 156 states have return successors, (543), 441 states have call predecessors, (543), 443 states have call successors, (543) [2022-07-13 17:18:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 4117 transitions. [2022-07-13 17:18:42,307 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 4117 transitions. Word has length 167 [2022-07-13 17:18:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:42,308 INFO L495 AbstractCegarLoop]: Abstraction has 2609 states and 4117 transitions. [2022-07-13 17:18:42,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-13 17:18:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 4117 transitions. [2022-07-13 17:18:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-13 17:18:42,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:42,312 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:42,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 17:18:42,313 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 390658598, now seen corresponding path program 1 times [2022-07-13 17:18:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059858088] [2022-07-13 17:18:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 17:18:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 17:18:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 17:18:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 17:18:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-13 17:18:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-13 17:18:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-13 17:18:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-13 17:18:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059858088] [2022-07-13 17:18:42,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059858088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:18:42,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325219943] [2022-07-13 17:18:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:42,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:18:42,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:18:42,590 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) [2022-07-13 17:18:42,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 17:18:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:42,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 17:18:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:18:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-13 17:18:43,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:18:43,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325219943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:43,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:18:43,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-07-13 17:18:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415930301] [2022-07-13 17:18:43,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:18:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:18:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:18:43,011 INFO L87 Difference]: Start difference. First operand 2609 states and 4117 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:43,589 INFO L93 Difference]: Finished difference Result 5076 states and 8186 transitions. [2022-07-13 17:18:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:18:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 166 [2022-07-13 17:18:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:43,597 INFO L225 Difference]: With dead ends: 5076 [2022-07-13 17:18:43,597 INFO L226 Difference]: Without dead ends: 2641 [2022-07-13 17:18:43,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:18:43,601 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 919 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:43,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 2415 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 17:18:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2022-07-13 17:18:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2641. [2022-07-13 17:18:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2033 states have (on average 1.5617314313821937) internal successors, (3175), 2110 states have internal predecessors, (3175), 447 states have call successors, (447), 150 states have call predecessors, (447), 160 states have return successors, (547), 441 states have call predecessors, (547), 443 states have call successors, (547) [2022-07-13 17:18:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4169 transitions. [2022-07-13 17:18:43,771 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4169 transitions. Word has length 166 [2022-07-13 17:18:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:43,772 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4169 transitions. [2022-07-13 17:18:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 17:18:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4169 transitions. [2022-07-13 17:18:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-13 17:18:43,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:43,777 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:43,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 17:18:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 17:18:43,996 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1618075023, now seen corresponding path program 1 times [2022-07-13 17:18:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:43,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679680505] [2022-07-13 17:18:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 17:18:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-13 17:18:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-07-13 17:18:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-07-13 17:18:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-07-13 17:18:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 17:18:44,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679680505] [2022-07-13 17:18:44,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679680505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:18:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176670383] [2022-07-13 17:18:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:18:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:18:44,338 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) [2022-07-13 17:18:44,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 17:18:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:44,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 17:18:44,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:18:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 17:18:44,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:18:44,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176670383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:44,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:18:44,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2022-07-13 17:18:44,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765661346] [2022-07-13 17:18:44,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 17:18:44,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 17:18:44,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-07-13 17:18:44,708 INFO L87 Difference]: Start difference. First operand 2641 states and 4169 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 4 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-13 17:18:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:18:48,058 INFO L93 Difference]: Finished difference Result 10559 states and 17159 transitions. [2022-07-13 17:18:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 17:18:48,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 4 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 169 [2022-07-13 17:18:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:18:48,117 INFO L225 Difference]: With dead ends: 10559 [2022-07-13 17:18:48,117 INFO L226 Difference]: Without dead ends: 8094 [2022-07-13 17:18:48,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-07-13 17:18:48,129 INFO L413 NwaCegarLoop]: 1733 mSDtfsCounter, 2952 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 7325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 17:18:48,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3066 Valid, 3154 Invalid, 7325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 17:18:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8094 states. [2022-07-13 17:18:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8094 to 7666. [2022-07-13 17:18:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 5832 states have (on average 1.5768175582990398) internal successors, (9196), 6071 states have internal predecessors, (9196), 1328 states have call successors, (1328), 426 states have call predecessors, (1328), 505 states have return successors, (1863), 1348 states have call predecessors, (1863), 1320 states have call successors, (1863) [2022-07-13 17:18:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 12387 transitions. [2022-07-13 17:18:48,724 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 12387 transitions. Word has length 169 [2022-07-13 17:18:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:18:48,724 INFO L495 AbstractCegarLoop]: Abstraction has 7666 states and 12387 transitions. [2022-07-13 17:18:48,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 4 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-13 17:18:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 12387 transitions. [2022-07-13 17:18:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-13 17:18:48,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:18:48,730 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:18:48,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 17:18:48,948 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,SelfDestructingSolverStorable26 [2022-07-13 17:18:48,948 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:18:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:18:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2008486829, now seen corresponding path program 1 times [2022-07-13 17:18:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:18:48,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847811568] [2022-07-13 17:18:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:18:48,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:18:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:48,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:18:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:48,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:18:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:48,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:18:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:48,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:48,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:18:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:18:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:18:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:18:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 17:18:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:18:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-13 17:18:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:18:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-13 17:18:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:18:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-13 17:18:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-13 17:18:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:18:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 17:18:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:18:49,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847811568] [2022-07-13 17:18:49,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847811568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:18:49,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:18:49,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 17:18:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154604751] [2022-07-13 17:18:49,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:18:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 17:18:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:18:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 17:18:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 17:18:49,254 INFO L87 Difference]: Start difference. First operand 7666 states and 12387 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-13 17:19:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:19:05,709 INFO L93 Difference]: Finished difference Result 35310 states and 60442 transitions. [2022-07-13 17:19:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 17:19:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 174 [2022-07-13 17:19:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:19:05,833 INFO L225 Difference]: With dead ends: 35310 [2022-07-13 17:19:05,833 INFO L226 Difference]: Without dead ends: 27824 [2022-07-13 17:19:05,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-07-13 17:19:05,863 INFO L413 NwaCegarLoop]: 1824 mSDtfsCounter, 6886 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 6801 mSolverCounterSat, 4498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6956 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 11299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4498 IncrementalHoareTripleChecker+Valid, 6801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-07-13 17:19:05,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6956 Valid, 3237 Invalid, 11299 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4498 Valid, 6801 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2022-07-13 17:19:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27824 states. [2022-07-13 17:19:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27824 to 7684. [2022-07-13 17:19:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7684 states, 5838 states have (on average 1.5748544021925317) internal successors, (9194), 6073 states have internal predecessors, (9194), 1334 states have call successors, (1334), 426 states have call predecessors, (1334), 511 states have return successors, (1868), 1358 states have call predecessors, (1868), 1326 states have call successors, (1868) [2022-07-13 17:19:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 12396 transitions. [2022-07-13 17:19:07,145 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 12396 transitions. Word has length 174 [2022-07-13 17:19:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:19:07,146 INFO L495 AbstractCegarLoop]: Abstraction has 7684 states and 12396 transitions. [2022-07-13 17:19:07,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-13 17:19:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 12396 transitions. [2022-07-13 17:19:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-13 17:19:07,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:19:07,151 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:19:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 17:19:07,151 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:19:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:19:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1257121169, now seen corresponding path program 1 times [2022-07-13 17:19:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:19:07,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846962292] [2022-07-13 17:19:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:07,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:19:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:19:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:19:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:19:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:19:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:19:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:19:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:19:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 17:19:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-13 17:19:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-13 17:19:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-13 17:19:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-13 17:19:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 17:19:07,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:19:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846962292] [2022-07-13 17:19:07,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846962292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:19:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417707825] [2022-07-13 17:19:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:07,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:19:07,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:19:07,459 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) [2022-07-13 17:19:07,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 17:19:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:07,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 17:19:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:19:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-13 17:19:07,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:19:07,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417707825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:19:07,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:19:07,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-07-13 17:19:07,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593124714] [2022-07-13 17:19:07,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:19:07,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 17:19:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:19:07,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 17:19:07,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-07-13 17:19:07,813 INFO L87 Difference]: Start difference. First operand 7684 states and 12396 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-13 17:19:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:19:09,177 INFO L93 Difference]: Finished difference Result 19531 states and 31593 transitions. [2022-07-13 17:19:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 17:19:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 174 [2022-07-13 17:19:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:19:09,230 INFO L225 Difference]: With dead ends: 19531 [2022-07-13 17:19:09,230 INFO L226 Difference]: Without dead ends: 12031 [2022-07-13 17:19:09,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-13 17:19:09,251 INFO L413 NwaCegarLoop]: 1224 mSDtfsCounter, 432 mSDsluCounter, 3793 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 5017 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:19:09,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 5017 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 17:19:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12031 states. [2022-07-13 17:19:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12031 to 11983. [2022-07-13 17:19:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11983 states, 9140 states have (on average 1.5447483588621445) internal successors, (14119), 9407 states have internal predecessors, (14119), 2008 states have call successors, (2008), 718 states have call predecessors, (2008), 834 states have return successors, (3054), 2031 states have call predecessors, (3054), 1992 states have call successors, (3054) [2022-07-13 17:19:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11983 states to 11983 states and 19181 transitions. [2022-07-13 17:19:10,587 INFO L78 Accepts]: Start accepts. Automaton has 11983 states and 19181 transitions. Word has length 174 [2022-07-13 17:19:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:19:10,588 INFO L495 AbstractCegarLoop]: Abstraction has 11983 states and 19181 transitions. [2022-07-13 17:19:10,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-13 17:19:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 11983 states and 19181 transitions. [2022-07-13 17:19:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-13 17:19:10,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:19:10,595 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:19:10,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 17:19:10,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 17:19:10,819 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:19:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:19:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash -820215729, now seen corresponding path program 1 times [2022-07-13 17:19:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:19:10,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001511981] [2022-07-13 17:19:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:19:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:10,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:19:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:10,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:19:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:10,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:19:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:10,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:19:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:19:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:19:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:19:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 17:19:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-13 17:19:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-13 17:19:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-13 17:19:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-13 17:19:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 17:19:11,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:19:11,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001511981] [2022-07-13 17:19:11,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001511981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:19:11,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278427362] [2022-07-13 17:19:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:11,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:19:11,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:19:11,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:19:11,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 17:19:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 17:19:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:19:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 17:19:11,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:19:11,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278427362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:19:11,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:19:11,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-07-13 17:19:11,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010294693] [2022-07-13 17:19:11,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:19:11,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 17:19:11,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:19:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 17:19:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-13 17:19:11,670 INFO L87 Difference]: Start difference. First operand 11983 states and 19181 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (24), 5 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-13 17:19:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:19:14,396 INFO L93 Difference]: Finished difference Result 23822 states and 38424 transitions. [2022-07-13 17:19:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:19:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (24), 5 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 174 [2022-07-13 17:19:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:19:14,444 INFO L225 Difference]: With dead ends: 23822 [2022-07-13 17:19:14,444 INFO L226 Difference]: Without dead ends: 12023 [2022-07-13 17:19:14,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-13 17:19:14,477 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 1568 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:19:14,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 1812 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2113 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 17:19:14,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12023 states. [2022-07-13 17:19:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12023 to 11363. [2022-07-13 17:19:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11363 states, 8290 states have (on average 1.5224366706875754) internal successors, (12621), 8709 states have internal predecessors, (12621), 2306 states have call successors, (2306), 638 states have call predecessors, (2306), 766 states have return successors, (3286), 2333 states have call predecessors, (3286), 2290 states have call successors, (3286) [2022-07-13 17:19:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18213 transitions. [2022-07-13 17:19:15,895 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18213 transitions. Word has length 174 [2022-07-13 17:19:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:19:15,895 INFO L495 AbstractCegarLoop]: Abstraction has 11363 states and 18213 transitions. [2022-07-13 17:19:15,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (24), 5 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-13 17:19:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18213 transitions. [2022-07-13 17:19:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-13 17:19:15,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:19:15,903 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:19:15,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 17:19:16,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:19:16,120 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:19:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:19:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1485693963, now seen corresponding path program 1 times [2022-07-13 17:19:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:19:16,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613735047] [2022-07-13 17:19:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:19:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:19:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:19:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:19:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:19:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:19:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:19:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:19:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 17:19:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 17:19:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-13 17:19:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 17:19:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-13 17:19:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 17:19:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-13 17:19:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-07-13 17:19:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-13 17:19:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-07-13 17:19:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-13 17:19:16,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:19:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613735047] [2022-07-13 17:19:16,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613735047] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:19:16,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:19:16,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 17:19:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528594803] [2022-07-13 17:19:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:19:16,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 17:19:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:19:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 17:19:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-13 17:19:16,427 INFO L87 Difference]: Start difference. First operand 11363 states and 18213 transitions. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2022-07-13 17:19:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:19:30,802 INFO L93 Difference]: Finished difference Result 47553 states and 83374 transitions. [2022-07-13 17:19:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 17:19:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 195 [2022-07-13 17:19:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:19:30,979 INFO L225 Difference]: With dead ends: 47553 [2022-07-13 17:19:30,979 INFO L226 Difference]: Without dead ends: 36368 [2022-07-13 17:19:31,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-07-13 17:19:31,036 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 3939 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 6917 mSolverCounterSat, 1802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 2993 SdHoareTripleChecker+Invalid, 8719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1802 IncrementalHoareTripleChecker+Valid, 6917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-13 17:19:31,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4135 Valid, 2993 Invalid, 8719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1802 Valid, 6917 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-07-13 17:19:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2022-07-13 17:19:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 11435. [2022-07-13 17:19:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11435 states, 8362 states have (on average 1.5179382922745754) internal successors, (12693), 8781 states have internal predecessors, (12693), 2306 states have call successors, (2306), 638 states have call predecessors, (2306), 766 states have return successors, (3286), 2333 states have call predecessors, (3286), 2290 states have call successors, (3286) [2022-07-13 17:19:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11435 states to 11435 states and 18285 transitions. [2022-07-13 17:19:33,166 INFO L78 Accepts]: Start accepts. Automaton has 11435 states and 18285 transitions. Word has length 195 [2022-07-13 17:19:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:19:33,166 INFO L495 AbstractCegarLoop]: Abstraction has 11435 states and 18285 transitions. [2022-07-13 17:19:33,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2022-07-13 17:19:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11435 states and 18285 transitions. [2022-07-13 17:19:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-13 17:19:33,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:19:33,174 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:19:33,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 17:19:33,174 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:19:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:19:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2058252265, now seen corresponding path program 1 times [2022-07-13 17:19:33,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:19:33,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441478029] [2022-07-13 17:19:33,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:33,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:19:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:19:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:19:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:19:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:19:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:19:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:19:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:19:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 17:19:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 17:19:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 17:19:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:19:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 17:19:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 17:19:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-13 17:19:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-07-13 17:19:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-07-13 17:19:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-07-13 17:19:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-13 17:19:33,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:19:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441478029] [2022-07-13 17:19:33,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441478029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:19:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066529893] [2022-07-13 17:19:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:33,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:19:33,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:19:33,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:19:33,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 17:19:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 17:19:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:19:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 17:19:33,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:19:33,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066529893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:19:33,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:19:33,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-13 17:19:33,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133777678] [2022-07-13 17:19:33,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:19:33,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 17:19:33,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:19:33,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 17:19:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:19:33,780 INFO L87 Difference]: Start difference. First operand 11435 states and 18285 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:19:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:19:35,799 INFO L93 Difference]: Finished difference Result 23160 states and 37489 transitions. [2022-07-13 17:19:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:19:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 207 [2022-07-13 17:19:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:19:35,849 INFO L225 Difference]: With dead ends: 23160 [2022-07-13 17:19:35,849 INFO L226 Difference]: Without dead ends: 11903 [2022-07-13 17:19:35,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:19:35,887 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 213 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:19:35,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2736 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 17:19:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11903 states. [2022-07-13 17:19:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11903 to 11903. [2022-07-13 17:19:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11903 states, 8818 states have (on average 1.5387843048310275) internal successors, (13569), 9237 states have internal predecessors, (13569), 2306 states have call successors, (2306), 650 states have call predecessors, (2306), 778 states have return successors, (3286), 2333 states have call predecessors, (3286), 2290 states have call successors, (3286) [2022-07-13 17:19:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11903 states to 11903 states and 19161 transitions. [2022-07-13 17:19:37,576 INFO L78 Accepts]: Start accepts. Automaton has 11903 states and 19161 transitions. Word has length 207 [2022-07-13 17:19:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:19:37,591 INFO L495 AbstractCegarLoop]: Abstraction has 11903 states and 19161 transitions. [2022-07-13 17:19:37,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:19:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 11903 states and 19161 transitions. [2022-07-13 17:19:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-13 17:19:37,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:19:37,598 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:19:37,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 17:19:37,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-13 17:19:37,816 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:19:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:19:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash -588481011, now seen corresponding path program 1 times [2022-07-13 17:19:37,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:19:37,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595491228] [2022-07-13 17:19:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:37,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:19:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:19:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:19:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:19:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:19:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:19:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:19:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:19:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 17:19:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-13 17:19:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 17:19:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 17:19:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 17:19:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-13 17:19:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 17:19:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 17:19:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-07-13 17:19:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-07-13 17:19:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-07-13 17:19:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-13 17:19:38,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:19:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595491228] [2022-07-13 17:19:38,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595491228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:19:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185431820] [2022-07-13 17:19:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:38,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:19:38,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:19:38,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:19:38,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 17:19:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:38,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 17:19:38,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:19:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-13 17:19:38,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:19:38,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185431820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:19:38,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:19:38,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 25 [2022-07-13 17:19:38,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049376080] [2022-07-13 17:19:38,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:19:38,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 17:19:38,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:19:38,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 17:19:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-07-13 17:19:38,997 INFO L87 Difference]: Start difference. First operand 11903 states and 19161 transitions. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 8 states have internal predecessors, (133), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-07-13 17:19:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:19:48,801 INFO L93 Difference]: Finished difference Result 47263 states and 79352 transitions. [2022-07-13 17:19:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 17:19:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 8 states have internal predecessors, (133), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 218 [2022-07-13 17:19:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:19:48,943 INFO L225 Difference]: With dead ends: 47263 [2022-07-13 17:19:48,944 INFO L226 Difference]: Without dead ends: 35534 [2022-07-13 17:19:48,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 17:19:48,995 INFO L413 NwaCegarLoop]: 1590 mSDtfsCounter, 2956 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 9614 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3174 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 10606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 9614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:19:48,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3174 Valid, 3371 Invalid, 10606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 9614 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-13 17:19:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35534 states. [2022-07-13 17:19:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35534 to 33652. [2022-07-13 17:19:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33652 states, 24662 states have (on average 1.5323169248236153) internal successors, (37790), 26047 states have internal predecessors, (37790), 6870 states have call successors, (6870), 1830 states have call predecessors, (6870), 2119 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-13 17:19:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33652 states to 33652 states and 54785 transitions. [2022-07-13 17:19:54,061 INFO L78 Accepts]: Start accepts. Automaton has 33652 states and 54785 transitions. Word has length 218 [2022-07-13 17:19:54,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:19:54,061 INFO L495 AbstractCegarLoop]: Abstraction has 33652 states and 54785 transitions. [2022-07-13 17:19:54,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 8 states have internal predecessors, (133), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-07-13 17:19:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 33652 states and 54785 transitions. [2022-07-13 17:19:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-13 17:19:54,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:19:54,067 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:19:54,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 17:19:54,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:19:54,284 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:19:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:19:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 549803331, now seen corresponding path program 1 times [2022-07-13 17:19:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:19:54,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581348686] [2022-07-13 17:19:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:19:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:19:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:19:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:19:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:19:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:19:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:19:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:19:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:19:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:19:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 17:19:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 17:19:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 17:19:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 17:19:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-13 17:19:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 17:19:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-13 17:19:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-07-13 17:19:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:19:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-07-13 17:19:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-07-13 17:19:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-13 17:19:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:19:54,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581348686] [2022-07-13 17:19:54,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581348686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:19:54,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600475374] [2022-07-13 17:19:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:19:54,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:19:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:19:54,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:19:54,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 17:19:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:19:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 17:19:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:19:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-13 17:19:54,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:19:54,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600475374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:19:54,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:19:54,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-13 17:19:54,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341322821] [2022-07-13 17:19:54,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:19:54,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 17:19:54,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:19:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 17:19:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:19:54,899 INFO L87 Difference]: Start difference. First operand 33652 states and 54785 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:20:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:20:00,488 INFO L93 Difference]: Finished difference Result 68526 states and 112792 transitions. [2022-07-13 17:20:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:20:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 212 [2022-07-13 17:20:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:20:00,675 INFO L225 Difference]: With dead ends: 68526 [2022-07-13 17:20:00,675 INFO L226 Difference]: Without dead ends: 35056 [2022-07-13 17:20:00,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:20:00,772 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 211 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:20:00,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 2736 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 17:20:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35056 states. [2022-07-13 17:20:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35056 to 35056. [2022-07-13 17:20:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35056 states, 26030 states have (on average 1.5527468305801) internal successors, (40418), 27415 states have internal predecessors, (40418), 6870 states have call successors, (6870), 1866 states have call predecessors, (6870), 2155 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-13 17:20:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35056 states to 35056 states and 57413 transitions. [2022-07-13 17:20:06,092 INFO L78 Accepts]: Start accepts. Automaton has 35056 states and 57413 transitions. Word has length 212 [2022-07-13 17:20:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:20:06,092 INFO L495 AbstractCegarLoop]: Abstraction has 35056 states and 57413 transitions. [2022-07-13 17:20:06,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:20:06,093 INFO L276 IsEmpty]: Start isEmpty. Operand 35056 states and 57413 transitions. [2022-07-13 17:20:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-07-13 17:20:06,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:20:06,100 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:20:06,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 17:20:06,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-13 17:20:06,307 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:20:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:20:06,307 INFO L85 PathProgramCache]: Analyzing trace with hash -535406189, now seen corresponding path program 1 times [2022-07-13 17:20:06,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:20:06,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657874766] [2022-07-13 17:20:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:20:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:20:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:20:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:20:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:20:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:20:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:20:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:20:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:20:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:20:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:20:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:20:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:20:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 17:20:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 17:20:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 17:20:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-13 17:20:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 17:20:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-13 17:20:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-13 17:20:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-07-13 17:20:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-07-13 17:20:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-13 17:20:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-13 17:20:06,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:20:06,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657874766] [2022-07-13 17:20:06,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657874766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:20:06,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855550614] [2022-07-13 17:20:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:20:06,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:20:06,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:20:06,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:20:06,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 17:20:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 17:20:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:20:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-13 17:20:06,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:20:06,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855550614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:20:06,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:20:06,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-13 17:20:06,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348558129] [2022-07-13 17:20:06,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:20:06,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 17:20:06,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:20:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 17:20:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:20:06,849 INFO L87 Difference]: Start difference. First operand 35056 states and 57413 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:20:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:20:12,550 INFO L93 Difference]: Finished difference Result 71334 states and 117964 transitions. [2022-07-13 17:20:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:20:12,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 216 [2022-07-13 17:20:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:20:12,712 INFO L225 Difference]: With dead ends: 71334 [2022-07-13 17:20:12,713 INFO L226 Difference]: Without dead ends: 36460 [2022-07-13 17:20:12,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:20:12,813 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 209 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:20:12,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 2736 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 17:20:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36460 states. [2022-07-13 17:20:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36460 to 36460. [2022-07-13 17:20:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36460 states, 27398 states have (on average 1.5711365793123586) internal successors, (43046), 28783 states have internal predecessors, (43046), 6870 states have call successors, (6870), 1902 states have call predecessors, (6870), 2191 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-13 17:20:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36460 states to 36460 states and 60041 transitions. [2022-07-13 17:20:18,188 INFO L78 Accepts]: Start accepts. Automaton has 36460 states and 60041 transitions. Word has length 216 [2022-07-13 17:20:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:20:18,189 INFO L495 AbstractCegarLoop]: Abstraction has 36460 states and 60041 transitions. [2022-07-13 17:20:18,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:20:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 36460 states and 60041 transitions. [2022-07-13 17:20:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-13 17:20:18,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:20:18,197 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:20:18,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 17:20:18,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-13 17:20:18,400 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:20:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:20:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1401286473, now seen corresponding path program 1 times [2022-07-13 17:20:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:20:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809357134] [2022-07-13 17:20:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:20:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:20:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:20:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:20:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:20:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:20:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:20:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:20:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:20:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:20:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:20:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:20:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:20:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 17:20:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 17:20:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 17:20:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-13 17:20:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 17:20:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-13 17:20:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-13 17:20:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-07-13 17:20:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-07-13 17:20:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-07-13 17:20:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 17:20:18,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:20:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809357134] [2022-07-13 17:20:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809357134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:20:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258826671] [2022-07-13 17:20:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:20:18,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:20:18,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:20:18,770 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:20:18,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 17:20:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 17:20:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:20:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-13 17:20:19,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:20:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258826671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:20:19,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:20:19,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-13 17:20:19,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767325336] [2022-07-13 17:20:19,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:20:19,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 17:20:19,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:20:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 17:20:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:20:19,065 INFO L87 Difference]: Start difference. First operand 36460 states and 60041 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:20:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:20:24,427 INFO L93 Difference]: Finished difference Result 74142 states and 123136 transitions. [2022-07-13 17:20:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:20:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 219 [2022-07-13 17:20:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:20:24,717 INFO L225 Difference]: With dead ends: 74142 [2022-07-13 17:20:24,718 INFO L226 Difference]: Without dead ends: 37864 [2022-07-13 17:20:24,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 17:20:24,834 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 207 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:20:24,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 2736 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 17:20:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37864 states. [2022-07-13 17:20:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37864 to 37864. [2022-07-13 17:20:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37864 states, 28766 states have (on average 1.5877772370159215) internal successors, (45674), 30151 states have internal predecessors, (45674), 6870 states have call successors, (6870), 1938 states have call predecessors, (6870), 2227 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-13 17:20:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37864 states to 37864 states and 62669 transitions. [2022-07-13 17:20:30,064 INFO L78 Accepts]: Start accepts. Automaton has 37864 states and 62669 transitions. Word has length 219 [2022-07-13 17:20:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:20:30,065 INFO L495 AbstractCegarLoop]: Abstraction has 37864 states and 62669 transitions. [2022-07-13 17:20:30,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 17:20:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 37864 states and 62669 transitions. [2022-07-13 17:20:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-13 17:20:30,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:20:30,073 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:20:30,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 17:20:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-13 17:20:30,276 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:20:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:20:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -405837285, now seen corresponding path program 1 times [2022-07-13 17:20:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:20:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460179751] [2022-07-13 17:20:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:20:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:20:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 17:20:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:20:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:20:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:20:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 17:20:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 17:20:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 17:20:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 17:20:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:20:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 17:20:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:20:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 17:20:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 17:20:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 17:20:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-13 17:20:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 17:20:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 17:20:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-13 17:20:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-13 17:20:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 17:20:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-13 17:20:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-07-13 17:20:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 17:20:30,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:20:30,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460179751] [2022-07-13 17:20:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460179751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:20:30,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068503180] [2022-07-13 17:20:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:20:30,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:20:30,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:20:30,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:20:30,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 17:20:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:20:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 17:20:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:20:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 17:20:31,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:20:31,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068503180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:20:31,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:20:31,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2022-07-13 17:20:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124747226] [2022-07-13 17:20:31,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:20:31,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 17:20:31,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:20:31,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 17:20:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-13 17:20:31,135 INFO L87 Difference]: Start difference. First operand 37864 states and 62669 transitions. Second operand has 9 states, 9 states have (on average 15.222222222222221) internal successors, (137), 7 states have internal predecessors, (137), 4 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2022-07-13 17:20:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:20:45,279 INFO L93 Difference]: Finished difference Result 120888 states and 204269 transitions. [2022-07-13 17:20:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 17:20:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.222222222222221) internal successors, (137), 7 states have internal predecessors, (137), 4 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) Word has length 221 [2022-07-13 17:20:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:20:45,775 INFO L225 Difference]: With dead ends: 120888 [2022-07-13 17:20:45,776 INFO L226 Difference]: Without dead ends: 61070 [2022-07-13 17:20:45,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 263 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-07-13 17:20:45,968 INFO L413 NwaCegarLoop]: 899 mSDtfsCounter, 2138 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 4950 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2261 SdHoareTripleChecker+Valid, 3020 SdHoareTripleChecker+Invalid, 5568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 4950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 17:20:45,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2261 Valid, 3020 Invalid, 5568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 4950 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 17:20:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61070 states.