./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sum20-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sum20-2.i -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 7c2f5d73c406c3ffc9c27d7cd89dbe0ce5d7ec9b20c32fdf36fe2abec0cffd86 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:18:25,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:18:25,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:18:25,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:18:25,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:18:25,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:18:25,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:18:25,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:18:25,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:18:25,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:18:25,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:18:25,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:18:25,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:18:25,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:18:25,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:18:25,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:18:25,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:18:25,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:18:25,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:18:25,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:18:25,364 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:18:25,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:18:25,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:18:25,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:18:25,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:18:25,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:18:25,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:18:25,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:18:25,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:18:25,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:18:25,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:18:25,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:18:25,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:18:25,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:18:25,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:18:25,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:18:25,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:18:25,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:18:25,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:18:25,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:18:25,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:18:25,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:18:25,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:18:25,394 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:18:25,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:18:25,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:18:25,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:18:25,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:18:25,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:18:25,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:18:25,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:18:25,396 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:18:25,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:18:25,396 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:18:25,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:18:25,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:18:25,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:18:25,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:18:25,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:18:25,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:18:25,398 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:18:25,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:18:25,399 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:18:25,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:18:25,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:18:25,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:18:25,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:18:25,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:18:25,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:18:25,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:18:25,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:18:25,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:18:25,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:18:25,401 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:18:25,402 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:18:25,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:18:25,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c2f5d73c406c3ffc9c27d7cd89dbe0ce5d7ec9b20c32fdf36fe2abec0cffd86 [2022-07-11 22:18:25,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:18:25,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:18:25,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:18:25,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:18:25,632 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:18:25,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum20-2.i [2022-07-11 22:18:25,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/343afc45e/b74719b87d084591b96436ed480b1001/FLAG39cf5889c [2022-07-11 22:18:26,061 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:18:26,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum20-2.i [2022-07-11 22:18:26,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/343afc45e/b74719b87d084591b96436ed480b1001/FLAG39cf5889c [2022-07-11 22:18:26,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/343afc45e/b74719b87d084591b96436ed480b1001 [2022-07-11 22:18:26,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:18:26,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:18:26,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:18:26,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:18:26,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:18:26,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a125caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26, skipping insertion in model container [2022-07-11 22:18:26,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:18:26,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:18:26,667 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/reducercommutativity/sum20-2.i[1277,1290] [2022-07-11 22:18:26,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:18:26,673 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:18:26,686 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/reducercommutativity/sum20-2.i[1277,1290] [2022-07-11 22:18:26,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:18:26,694 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:18:26,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26 WrapperNode [2022-07-11 22:18:26,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:18:26,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:18:26,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:18:26,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:18:26,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,716 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-11 22:18:26,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:18:26,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:18:26,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:18:26,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:18:26,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:18:26,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:18:26,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:18:26,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:18:26,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (1/1) ... [2022-07-11 22:18:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:18:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:26,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 22:18:26,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 22:18:26,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:18:26,784 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-07-11 22:18:26,784 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-07-11 22:18:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:18:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:18:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:18:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:18:26,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:18:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:18:26,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:18:26,826 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:18:26,827 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:18:26,962 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:18:26,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:18:26,979 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 22:18:26,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:18:26 BoogieIcfgContainer [2022-07-11 22:18:26,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:18:26,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:18:26,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:18:26,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:18:26,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:18:26" (1/3) ... [2022-07-11 22:18:26,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b32ae14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:18:26, skipping insertion in model container [2022-07-11 22:18:26,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:18:26" (2/3) ... [2022-07-11 22:18:26,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b32ae14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:18:26, skipping insertion in model container [2022-07-11 22:18:26,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:18:26" (3/3) ... [2022-07-11 22:18:26,988 INFO L111 eAbstractionObserver]: Analyzing ICFG sum20-2.i [2022-07-11 22:18:26,997 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:18:26,997 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:18:27,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:18:27,056 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@72786dde, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14e4c02e [2022-07-11 22:18:27,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:18:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 22:18:27,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:27,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:27,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-07-11 22:18:27,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203719303] [2022-07-11 22:18:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 22:18:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 22:18:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:18:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 22:18:27,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203719303] [2022-07-11 22:18:27,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203719303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:27,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220326052] [2022-07-11 22:18:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:27,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:27,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:27,349 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) [2022-07-11 22:18:27,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:18:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:18:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:18:27,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:18:27,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220326052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:18:27,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:18:27,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 22:18:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472075307] [2022-07-11 22:18:27,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:18:27,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:18:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:27,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:18:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:18:27,458 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:18:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:27,480 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-11 22:18:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:18:27,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-11 22:18:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:27,488 INFO L225 Difference]: With dead ends: 50 [2022-07-11 22:18:27,488 INFO L226 Difference]: Without dead ends: 24 [2022-07-11 22:18:27,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:18:27,500 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:27,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-11 22:18:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-11 22:18:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-11 22:18:27,531 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-11 22:18:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:27,532 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-11 22:18:27,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:18:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-11 22:18:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:18:27,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:27,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:27,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:18:27,755 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,SelfDestructingSolverStorable0 [2022-07-11 22:18:27,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-07-11 22:18:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:27,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650375746] [2022-07-11 22:18:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:27,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:18:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-11 22:18:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:18:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:18:27,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650375746] [2022-07-11 22:18:27,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650375746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:27,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600140073] [2022-07-11 22:18:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:27,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:27,823 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) [2022-07-11 22:18:27,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:18:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:27,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:18:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:18:27,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:18:27,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600140073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:18:27,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:18:27,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 22:18:27,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028923198] [2022-07-11 22:18:27,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:18:27,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:18:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:18:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:18:27,901 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:18:27,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:27,908 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-07-11 22:18:27,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:18:27,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-11 22:18:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:27,909 INFO L225 Difference]: With dead ends: 42 [2022-07-11 22:18:27,910 INFO L226 Difference]: Without dead ends: 25 [2022-07-11 22:18:27,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:18:27,911 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:27,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-11 22:18:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-11 22:18:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-11 22:18:27,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-07-11 22:18:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:27,915 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-11 22:18:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:18:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-11 22:18:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 22:18:27,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:27,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:27,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:28,119 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,SelfDestructingSolverStorable1 [2022-07-11 22:18:28,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-07-11 22:18:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:28,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568732075] [2022-07-11 22:18:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:18:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-11 22:18:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:18:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 22:18:28,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568732075] [2022-07-11 22:18:28,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568732075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229897947] [2022-07-11 22:18:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:28,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:28,230 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) [2022-07-11 22:18:28,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:18:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:18:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 22:18:28,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:18:28,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229897947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:18:28,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:18:28,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 22:18:28,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901597756] [2022-07-11 22:18:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:18:28,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:18:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:18:28,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:18:28,300 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:18:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:28,308 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-11 22:18:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:18:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-11 22:18:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:28,309 INFO L225 Difference]: With dead ends: 39 [2022-07-11 22:18:28,309 INFO L226 Difference]: Without dead ends: 26 [2022-07-11 22:18:28,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:18:28,311 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:28,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-11 22:18:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-11 22:18:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-11 22:18:28,315 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-07-11 22:18:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:28,316 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-11 22:18:28,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:18:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-11 22:18:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 22:18:28,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:28,317 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 22:18:28,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:28,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:28,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-07-11 22:18:28,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:28,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469408430] [2022-07-11 22:18:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:28,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:18:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-11 22:18:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:18:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 22:18:28,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469408430] [2022-07-11 22:18:28,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469408430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203052224] [2022-07-11 22:18:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:28,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:28,596 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) [2022-07-11 22:18:28,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:18:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:18:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 22:18:28,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 22:18:28,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203052224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:28,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:28,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-11 22:18:28,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183817194] [2022-07-11 22:18:28,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:28,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 22:18:28,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 22:18:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:18:28,697 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:18:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:28,722 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-11 22:18:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 22:18:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-07-11 22:18:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:28,724 INFO L225 Difference]: With dead ends: 54 [2022-07-11 22:18:28,724 INFO L226 Difference]: Without dead ends: 34 [2022-07-11 22:18:28,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:18:28,725 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:28,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-11 22:18:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-07-11 22:18:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-11 22:18:28,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-07-11 22:18:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:28,730 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-11 22:18:28,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:18:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-11 22:18:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 22:18:28,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:28,731 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:28,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-11 22:18:28,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:28,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-07-11 22:18:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65953454] [2022-07-11 22:18:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-11 22:18:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-11 22:18:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-11 22:18:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-11 22:18:29,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:29,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65953454] [2022-07-11 22:18:29,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65953454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:29,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716146218] [2022-07-11 22:18:29,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:18:29,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:29,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:29,080 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) [2022-07-11 22:18:29,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:18:29,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:18:29,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:18:29,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-11 22:18:29,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-11 22:18:29,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716146218] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:29,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:29,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-11 22:18:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065749304] [2022-07-11 22:18:29,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 22:18:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 22:18:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:18:29,285 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-11 22:18:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:29,320 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-07-11 22:18:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:18:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-07-11 22:18:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:29,321 INFO L225 Difference]: With dead ends: 70 [2022-07-11 22:18:29,321 INFO L226 Difference]: Without dead ends: 48 [2022-07-11 22:18:29,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:18:29,322 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:29,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-11 22:18:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-11 22:18:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-11 22:18:29,327 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-07-11 22:18:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:29,327 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-11 22:18:29,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-11 22:18:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-11 22:18:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 22:18:29,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:29,328 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:29,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:29,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:29,558 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:29,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-07-11 22:18:29,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:29,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012558670] [2022-07-11 22:18:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:29,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 22:18:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-11 22:18:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:18:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-11 22:18:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012558670] [2022-07-11 22:18:29,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012558670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155726803] [2022-07-11 22:18:29,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:18:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:29,680 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) [2022-07-11 22:18:29,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:18:29,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 22:18:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:29,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:18:29,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-11 22:18:29,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-11 22:18:29,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155726803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:29,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:29,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-11 22:18:29,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67501421] [2022-07-11 22:18:29,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:29,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:18:29,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:29,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:18:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:18:29,852 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:29,912 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-07-11 22:18:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-11 22:18:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-07-11 22:18:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:29,914 INFO L225 Difference]: With dead ends: 82 [2022-07-11 22:18:29,915 INFO L226 Difference]: Without dead ends: 58 [2022-07-11 22:18:29,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:18:29,916 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:29,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-11 22:18:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-07-11 22:18:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-11 22:18:29,927 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-07-11 22:18:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:29,927 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-11 22:18:29,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-11 22:18:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-11 22:18:29,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:29,929 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:29,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:30,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:30,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2022-07-11 22:18:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272889432] [2022-07-11 22:18:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:18:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 22:18:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-11 22:18:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-11 22:18:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272889432] [2022-07-11 22:18:30,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272889432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962673354] [2022-07-11 22:18:30,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:18:30,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:30,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:30,364 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) [2022-07-11 22:18:30,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:18:30,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:18:30,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:18:30,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-11 22:18:30,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-11 22:18:30,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962673354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:30,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:30,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-07-11 22:18:30,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140450282] [2022-07-11 22:18:30,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:30,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:18:30,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:18:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:18:30,519 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:30,579 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-11 22:18:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 22:18:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-07-11 22:18:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:30,582 INFO L225 Difference]: With dead ends: 100 [2022-07-11 22:18:30,582 INFO L226 Difference]: Without dead ends: 68 [2022-07-11 22:18:30,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:18:30,583 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:30,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:18:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-11 22:18:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-11 22:18:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-11 22:18:30,595 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-07-11 22:18:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:30,596 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-11 22:18:30,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-11 22:18:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-11 22:18:30,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:30,601 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:30,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:30,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:30,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2022-07-11 22:18:30,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:30,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397251383] [2022-07-11 22:18:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:30,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:18:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-11 22:18:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 22:18:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-07-11 22:18:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397251383] [2022-07-11 22:18:30,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397251383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920828510] [2022-07-11 22:18:30,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:18:30,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:30,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:30,928 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) [2022-07-11 22:18:30,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:18:31,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-11 22:18:31,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:18:31,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-11 22:18:31,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-11 22:18:31,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920828510] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:31,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:31,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-07-11 22:18:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916475480] [2022-07-11 22:18:31,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:31,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 22:18:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 22:18:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-11 22:18:31,590 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:31,665 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-07-11 22:18:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 22:18:31,665 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-07-11 22:18:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:31,666 INFO L225 Difference]: With dead ends: 126 [2022-07-11 22:18:31,666 INFO L226 Difference]: Without dead ends: 86 [2022-07-11 22:18:31,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-11 22:18:31,667 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:31,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:18:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-11 22:18:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-11 22:18:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-11 22:18:31,672 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-07-11 22:18:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:31,673 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-11 22:18:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-11 22:18:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 22:18:31,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:31,674 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:31,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:31,895 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,SelfDestructingSolverStorable7 [2022-07-11 22:18:31,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2022-07-11 22:18:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:31,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594722264] [2022-07-11 22:18:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:32,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 22:18:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:32,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-11 22:18:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-11 22:18:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-11 22:18:32,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:32,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594722264] [2022-07-11 22:18:32,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594722264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:32,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402990768] [2022-07-11 22:18:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:18:32,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:32,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:32,058 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) [2022-07-11 22:18:32,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:18:32,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-11 22:18:32,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:18:32,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-07-11 22:18:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-07-11 22:18:32,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402990768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:32,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:32,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-07-11 22:18:32,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859989832] [2022-07-11 22:18:32,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:32,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-11 22:18:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-11 22:18:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-11 22:18:32,602 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:32,667 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-07-11 22:18:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-11 22:18:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-07-11 22:18:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:32,669 INFO L225 Difference]: With dead ends: 160 [2022-07-11 22:18:32,669 INFO L226 Difference]: Without dead ends: 104 [2022-07-11 22:18:32,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-11 22:18:32,670 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:32,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:18:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-11 22:18:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-07-11 22:18:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-07-11 22:18:32,675 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-07-11 22:18:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:32,676 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-07-11 22:18:32,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:18:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-07-11 22:18:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-11 22:18:32,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:32,677 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:32,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:32,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:32,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2022-07-11 22:18:32,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:32,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924071534] [2022-07-11 22:18:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:32,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:18:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-11 22:18:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-11 22:18:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:18:33,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924071534] [2022-07-11 22:18:33,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924071534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551118831] [2022-07-11 22:18:33,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:18:33,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:33,079 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) [2022-07-11 22:18:33,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:18:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 22:18:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:18:33,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:18:33,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551118831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:33,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:33,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-11 22:18:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159158017] [2022-07-11 22:18:33,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:33,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 22:18:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 22:18:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:18:33,388 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:18:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:33,426 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2022-07-11 22:18:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 22:18:33,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-07-11 22:18:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:33,427 INFO L225 Difference]: With dead ends: 187 [2022-07-11 22:18:33,427 INFO L226 Difference]: Without dead ends: 115 [2022-07-11 22:18:33,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:18:33,429 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:33,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 134 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-11 22:18:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-07-11 22:18:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-07-11 22:18:33,434 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 168 [2022-07-11 22:18:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:33,435 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-07-11 22:18:33,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:18:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-07-11 22:18:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-11 22:18:33,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:33,436 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:33,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-11 22:18:33,652 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,SelfDestructingSolverStorable9 [2022-07-11 22:18:33,653 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash 28900907, now seen corresponding path program 8 times [2022-07-11 22:18:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:33,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49634901] [2022-07-11 22:18:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-11 22:18:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-11 22:18:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 22:18:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2022-07-11 22:18:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:33,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49634901] [2022-07-11 22:18:33,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49634901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:33,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453776075] [2022-07-11 22:18:33,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:18:33,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:33,932 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) [2022-07-11 22:18:33,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:18:34,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:18:34,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 22:18:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 844 proven. 196 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2022-07-11 22:18:34,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2022-07-11 22:18:34,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453776075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:34,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:34,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-07-11 22:18:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10696858] [2022-07-11 22:18:34,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:34,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 22:18:34,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 22:18:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:18:34,242 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 22:18:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:34,280 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2022-07-11 22:18:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 22:18:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 180 [2022-07-11 22:18:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:34,281 INFO L225 Difference]: With dead ends: 198 [2022-07-11 22:18:34,281 INFO L226 Difference]: Without dead ends: 127 [2022-07-11 22:18:34,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:18:34,282 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:34,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 90 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-11 22:18:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-11 22:18:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-07-11 22:18:34,288 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 180 [2022-07-11 22:18:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:34,288 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-07-11 22:18:34,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 22:18:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-07-11 22:18:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-07-11 22:18:34,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:34,290 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:34,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:34,521 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,SelfDestructingSolverStorable10 [2022-07-11 22:18:34,522 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2018486625, now seen corresponding path program 9 times [2022-07-11 22:18:34,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:34,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102986112] [2022-07-11 22:18:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:34,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-11 22:18:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:34,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-11 22:18:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:34,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-11 22:18:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:18:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-07-11 22:18:34,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:18:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102986112] [2022-07-11 22:18:34,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102986112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:18:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100225613] [2022-07-11 22:18:34,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:18:34,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:18:34,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:18:34,736 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) [2022-07-11 22:18:34,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:18:38,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-11 22:18:38,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:18:38,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 22:18:38,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:18:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 1690 proven. 196 refuted. 0 times theorem prover too weak. 2445 trivial. 0 not checked. [2022-07-11 22:18:38,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:18:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-07-11 22:18:38,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100225613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:18:38,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:18:38,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-07-11 22:18:38,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126177056] [2022-07-11 22:18:38,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:18:38,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 22:18:38,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:18:38,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 22:18:38,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:18:38,902 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 22:18:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:18:38,945 INFO L93 Difference]: Finished difference Result 188 states and 197 transitions. [2022-07-11 22:18:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-11 22:18:38,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 216 [2022-07-11 22:18:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:18:38,949 INFO L225 Difference]: With dead ends: 188 [2022-07-11 22:18:38,949 INFO L226 Difference]: Without dead ends: 137 [2022-07-11 22:18:38,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:18:38,950 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:18:38,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 108 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:18:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-11 22:18:38,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-11 22:18:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:18:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-07-11 22:18:38,959 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 216 [2022-07-11 22:18:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:18:38,960 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-07-11 22:18:38,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 22:18:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-07-11 22:18:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-11 22:18:38,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:18:38,963 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:18:38,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:18:39,187 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,SelfDestructingSolverStorable11 [2022-07-11 22:18:39,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:18:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:18:39,188 INFO L85 PathProgramCache]: Analyzing trace with hash -785433547, now seen corresponding path program 10 times [2022-07-11 22:18:39,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:18:39,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29216594] [2022-07-11 22:18:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:18:39,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:18:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat