./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/mapavg1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/array-crafted/mapavg1.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 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 10:52:13,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 10:52:13,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 10:52:13,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 10:52:13,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 10:52:13,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 10:52:13,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 10:52:13,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 10:52:13,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 10:52:13,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 10:52:13,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 10:52:13,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 10:52:13,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 10:52:13,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 10:52:13,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 10:52:13,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 10:52:13,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 10:52:13,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 10:52:13,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 10:52:13,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 10:52:13,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 10:52:13,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 10:52:13,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 10:52:13,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 10:52:13,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 10:52:13,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 10:52:13,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 10:52:13,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 10:52:13,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 10:52:13,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 10:52:13,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 10:52:13,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 10:52:13,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 10:52:13,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 10:52:13,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 10:52:13,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 10:52:13,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 10:52:13,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 10:52:13,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 10:52:13,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 10:52:13,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 10:52:13,667 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 10:52:13,705 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 10:52:13,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 10:52:13,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 10:52:13,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 10:52:13,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 10:52:13,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 10:52:13,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 10:52:13,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 10:52:13,708 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 10:52:13,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 10:52:13,709 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 10:52:13,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 10:52:13,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 10:52:13,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 10:52:13,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 10:52:13,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 10:52:13,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 10:52:13,711 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 10:52:13,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 10:52:13,711 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 10:52:13,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 10:52:13,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 10:52:13,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 10:52:13,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 10:52:13,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:52:13,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 10:52:13,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 10:52:13,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 10:52:13,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 10:52:13,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 10:52:13,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 10:52:13,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 10:52:13,714 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 10:52:13,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 10:52:13,714 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 10:52:13,714 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 [2023-02-18 10:52:13,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 10:52:13,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 10:52:13,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 10:52:13,929 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 10:52:13,932 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 10:52:13,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg1.i [2023-02-18 10:52:15,071 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 10:52:15,284 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 10:52:15,285 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i [2023-02-18 10:52:15,289 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721d2c51c/752ee1a70b964d8096c6d564a6e86840/FLAGff38b1048 [2023-02-18 10:52:15,300 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721d2c51c/752ee1a70b964d8096c6d564a6e86840 [2023-02-18 10:52:15,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 10:52:15,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 10:52:15,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 10:52:15,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 10:52:15,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 10:52:15,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261e806a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15, skipping insertion in model container [2023-02-18 10:52:15,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 10:52:15,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 10:52:15,463 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2023-02-18 10:52:15,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:52:15,474 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 10:52:15,491 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2023-02-18 10:52:15,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:52:15,503 INFO L208 MainTranslator]: Completed translation [2023-02-18 10:52:15,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15 WrapperNode [2023-02-18 10:52:15,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 10:52:15,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 10:52:15,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 10:52:15,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 10:52:15,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,530 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-18 10:52:15,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 10:52:15,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 10:52:15,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 10:52:15,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 10:52:15,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 10:52:15,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 10:52:15,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 10:52:15,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 10:52:15,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (1/1) ... [2023-02-18 10:52:15,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:52:15,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:15,584 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) [2023-02-18 10:52:15,587 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 [2023-02-18 10:52:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 10:52:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 10:52:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 10:52:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 10:52:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 10:52:15,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 10:52:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 10:52:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2023-02-18 10:52:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2023-02-18 10:52:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 10:52:15,693 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 10:52:15,695 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 10:52:15,839 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 10:52:15,845 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 10:52:15,845 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 10:52:15,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:52:15 BoogieIcfgContainer [2023-02-18 10:52:15,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 10:52:15,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 10:52:15,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 10:52:15,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 10:52:15,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:52:15" (1/3) ... [2023-02-18 10:52:15,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3be93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:52:15, skipping insertion in model container [2023-02-18 10:52:15,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:52:15" (2/3) ... [2023-02-18 10:52:15,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3be93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:52:15, skipping insertion in model container [2023-02-18 10:52:15,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:52:15" (3/3) ... [2023-02-18 10:52:15,855 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2023-02-18 10:52:15,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 10:52:15,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 10:52:15,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 10:52:15,920 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3dfda91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 10:52:15,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 10:52:15,924 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) [2023-02-18 10:52:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 10:52:15,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:15,932 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] [2023-02-18 10:52:15,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2023-02-18 10:52:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:15,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502818690] [2023-02-18 10:52:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:16,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:52:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:16,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 10:52:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:16,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-18 10:52:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 10:52:16,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:16,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502818690] [2023-02-18 10:52:16,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502818690] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834301077] [2023-02-18 10:52:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:16,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:16,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:16,346 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) [2023-02-18 10:52:16,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 10:52:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:52:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:52:16,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:52:16,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834301077] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:52:16,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:52:16,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-18 10:52:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567509215] [2023-02-18 10:52:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:52:16,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:52:16,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:52:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:52:16,524 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) [2023-02-18 10:52:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:16,565 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-02-18 10:52:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:52:16,567 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 [2023-02-18 10:52:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:16,573 INFO L225 Difference]: With dead ends: 50 [2023-02-18 10:52:16,574 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 10:52:16,578 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 [2023-02-18 10:52:16,582 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 [2023-02-18 10:52:16,584 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] [2023-02-18 10:52:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 10:52:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-02-18 10:52:16,614 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) [2023-02-18 10:52:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-18 10:52:16,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-18 10:52:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:16,616 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-18 10:52:16,617 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) [2023-02-18 10:52:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-18 10:52:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 10:52:16,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:16,618 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] [2023-02-18 10:52:16,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:16,825 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 [2023-02-18 10:52:16,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2023-02-18 10:52:16,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:16,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558718637] [2023-02-18 10:52:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:16,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:52:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 10:52:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-18 10:52:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:52:17,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:17,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558718637] [2023-02-18 10:52:17,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558718637] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:17,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084172776] [2023-02-18 10:52:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:17,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:17,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:17,083 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) [2023-02-18 10:52:17,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 10:52:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:52:17,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 10:52:17,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:52:17,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084172776] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:52:17,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:52:17,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-18 10:52:17,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911429045] [2023-02-18 10:52:17,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:52:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:52:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:17,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:52:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:52:17,214 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) [2023-02-18 10:52:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:17,232 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-18 10:52:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:52:17,233 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 [2023-02-18 10:52:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:17,234 INFO L225 Difference]: With dead ends: 42 [2023-02-18 10:52:17,234 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 10:52:17,235 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 [2023-02-18 10:52:17,237 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 [2023-02-18 10:52:17,238 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] [2023-02-18 10:52:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 10:52:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-18 10:52:17,246 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) [2023-02-18 10:52:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-18 10:52:17,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-02-18 10:52:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:17,248 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-18 10:52:17,248 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) [2023-02-18 10:52:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-18 10:52:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 10:52:17,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:17,250 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] [2023-02-18 10:52:17,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:17,456 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 [2023-02-18 10:52:17,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2023-02-18 10:52:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:17,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936800049] [2023-02-18 10:52:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:52:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 10:52:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 10:52:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 10:52:17,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936800049] [2023-02-18 10:52:17,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936800049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708365185] [2023-02-18 10:52:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:17,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:17,624 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) [2023-02-18 10:52:17,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 10:52:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:17,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:52:17,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 10:52:17,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:52:17,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708365185] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:52:17,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:52:17,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-18 10:52:17,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724136920] [2023-02-18 10:52:17,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:52:17,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:52:17,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:17,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:52:17,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 10:52:17,722 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) [2023-02-18 10:52:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:17,735 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-18 10:52:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:52:17,736 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 [2023-02-18 10:52:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:17,737 INFO L225 Difference]: With dead ends: 39 [2023-02-18 10:52:17,737 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 10:52:17,738 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 [2023-02-18 10:52:17,740 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 [2023-02-18 10:52:17,742 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] [2023-02-18 10:52:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 10:52:17,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-18 10:52:17,749 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) [2023-02-18 10:52:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-18 10:52:17,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2023-02-18 10:52:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:17,752 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-18 10:52:17,753 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) [2023-02-18 10:52:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-18 10:52:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 10:52:17,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:17,754 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] [2023-02-18 10:52:17,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:17,955 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 [2023-02-18 10:52:17,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2023-02-18 10:52:17,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:17,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922985573] [2023-02-18 10:52:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:52:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 10:52:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 10:52:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 10:52:18,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:18,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922985573] [2023-02-18 10:52:18,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922985573] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:18,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916891510] [2023-02-18 10:52:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:18,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:18,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:18,071 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) [2023-02-18 10:52:18,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 10:52:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 10:52:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 10:52:18,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 10:52:18,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916891510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:18,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:18,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-18 10:52:18,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203220129] [2023-02-18 10:52:18,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 10:52:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 10:52:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 10:52:18,185 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) [2023-02-18 10:52:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:18,215 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-18 10:52:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 10:52:18,216 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 [2023-02-18 10:52:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:18,217 INFO L225 Difference]: With dead ends: 54 [2023-02-18 10:52:18,217 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 10:52:18,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 10:52:18,218 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:18,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:52:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 10:52:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-02-18 10:52:18,222 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) [2023-02-18 10:52:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-18 10:52:18,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2023-02-18 10:52:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:18,223 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-18 10:52:18,224 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) [2023-02-18 10:52:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-18 10:52:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 10:52:18,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:18,225 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] [2023-02-18 10:52:18,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:18,431 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 [2023-02-18 10:52:18,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2023-02-18 10:52:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:18,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712508935] [2023-02-18 10:52:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 10:52:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-18 10:52:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-18 10:52:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 10:52:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712508935] [2023-02-18 10:52:18,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712508935] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290166445] [2023-02-18 10:52:18,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:52:18,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:18,506 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) [2023-02-18 10:52:18,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 10:52:18,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:52:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 10:52:18,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 10:52:18,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 10:52:18,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290166445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:18,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:18,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-18 10:52:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499796733] [2023-02-18 10:52:18,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:18,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 10:52:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:18,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 10:52:18,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 10:52:18,684 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) [2023-02-18 10:52:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:18,725 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-02-18 10:52:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 10:52:18,726 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 [2023-02-18 10:52:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:18,727 INFO L225 Difference]: With dead ends: 70 [2023-02-18 10:52:18,727 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 10:52:18,727 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 [2023-02-18 10:52:18,728 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:18,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:52:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 10:52:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-18 10:52:18,733 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) [2023-02-18 10:52:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-18 10:52:18,734 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2023-02-18 10:52:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:18,734 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-18 10:52:18,735 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) [2023-02-18 10:52:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-18 10:52:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 10:52:18,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:18,736 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] [2023-02-18 10:52:18,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:18,942 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 [2023-02-18 10:52:18,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2023-02-18 10:52:18,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:18,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853748575] [2023-02-18 10:52:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:18,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 10:52:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-18 10:52:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-18 10:52:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 10:52:19,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:19,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853748575] [2023-02-18 10:52:19,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853748575] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:19,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333146151] [2023-02-18 10:52:19,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:52:19,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:19,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:19,185 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) [2023-02-18 10:52:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 10:52:19,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 10:52:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:52:19,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-18 10:52:19,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-18 10:52:19,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333146151] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:19,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:19,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-18 10:52:19,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689699094] [2023-02-18 10:52:19,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:19,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 10:52:19,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 10:52:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:52:19,330 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) [2023-02-18 10:52:19,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:19,381 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2023-02-18 10:52:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 10:52:19,382 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 [2023-02-18 10:52:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:19,383 INFO L225 Difference]: With dead ends: 82 [2023-02-18 10:52:19,383 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 10:52:19,384 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 [2023-02-18 10:52:19,385 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:19,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:52:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 10:52:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-18 10:52:19,394 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) [2023-02-18 10:52:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-02-18 10:52:19,398 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2023-02-18 10:52:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:19,399 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-02-18 10:52:19,399 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) [2023-02-18 10:52:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-02-18 10:52:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 10:52:19,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:19,402 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] [2023-02-18 10:52:19,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:19,608 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 [2023-02-18 10:52:19,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2023-02-18 10:52:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:19,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901875434] [2023-02-18 10:52:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 10:52:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 10:52:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-18 10:52:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-18 10:52:19,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901875434] [2023-02-18 10:52:19,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901875434] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576611335] [2023-02-18 10:52:19,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:52:19,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:19,881 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) [2023-02-18 10:52:19,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 10:52:19,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:52:19,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:52:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-02-18 10:52:20,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-18 10:52:20,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576611335] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:20,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:20,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-02-18 10:52:20,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904145012] [2023-02-18 10:52:20,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:20,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 10:52:20,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 10:52:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-18 10:52:20,072 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) [2023-02-18 10:52:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:20,131 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-02-18 10:52:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 10:52:20,131 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 [2023-02-18 10:52:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:20,134 INFO L225 Difference]: With dead ends: 100 [2023-02-18 10:52:20,134 INFO L226 Difference]: Without dead ends: 68 [2023-02-18 10:52:20,137 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 [2023-02-18 10:52:20,138 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:20,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:52:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-18 10:52:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-02-18 10:52:20,153 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) [2023-02-18 10:52:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-02-18 10:52:20,156 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2023-02-18 10:52:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:20,158 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-02-18 10:52:20,158 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) [2023-02-18 10:52:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-02-18 10:52:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 10:52:20,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:20,162 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] [2023-02-18 10:52:20,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:20,369 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 [2023-02-18 10:52:20,369 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:20,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2023-02-18 10:52:20,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:20,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372014664] [2023-02-18 10:52:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:20,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:20,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 10:52:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 10:52:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:20,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-18 10:52:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-02-18 10:52:20,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:20,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372014664] [2023-02-18 10:52:20,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372014664] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:20,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926988377] [2023-02-18 10:52:20,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 10:52:20,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:20,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:20,653 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) [2023-02-18 10:52:20,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 10:52:21,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-18 10:52:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:21,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 10:52:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-02-18 10:52:21,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-18 10:52:21,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926988377] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:21,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:21,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-02-18 10:52:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283743139] [2023-02-18 10:52:21,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 10:52:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 10:52:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-02-18 10:52:21,670 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) [2023-02-18 10:52:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:21,747 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2023-02-18 10:52:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 10:52:21,747 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 [2023-02-18 10:52:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:21,748 INFO L225 Difference]: With dead ends: 126 [2023-02-18 10:52:21,748 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 10:52:21,749 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 [2023-02-18 10:52:21,750 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:21,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:52:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 10:52:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2023-02-18 10:52:21,755 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) [2023-02-18 10:52:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-02-18 10:52:21,755 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2023-02-18 10:52:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:21,756 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-02-18 10:52:21,756 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) [2023-02-18 10:52:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-02-18 10:52:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 10:52:21,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:21,758 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] [2023-02-18 10:52:21,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:21,966 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 [2023-02-18 10:52:21,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2023-02-18 10:52:21,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:21,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857517238] [2023-02-18 10:52:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:21,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:22,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-18 10:52:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:22,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-02-18 10:52:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:22,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-02-18 10:52:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-02-18 10:52:22,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:22,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857517238] [2023-02-18 10:52:22,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857517238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:22,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254506330] [2023-02-18 10:52:22,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 10:52:22,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:22,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:22,316 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) [2023-02-18 10:52:22,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 10:52:22,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-18 10:52:22,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:22,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 10:52:22,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2023-02-18 10:52:23,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2023-02-18 10:52:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254506330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:23,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:23,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2023-02-18 10:52:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867490967] [2023-02-18 10:52:23,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:23,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 10:52:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 10:52:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-18 10:52:23,178 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) [2023-02-18 10:52:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:23,257 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2023-02-18 10:52:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 10:52:23,258 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 [2023-02-18 10:52:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:23,258 INFO L225 Difference]: With dead ends: 160 [2023-02-18 10:52:23,259 INFO L226 Difference]: Without dead ends: 104 [2023-02-18 10:52:23,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-18 10:52:23,260 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:23,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:52:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-18 10:52:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2023-02-18 10:52:23,265 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) [2023-02-18 10:52:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2023-02-18 10:52:23,266 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2023-02-18 10:52:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:23,266 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2023-02-18 10:52:23,267 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) [2023-02-18 10:52:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2023-02-18 10:52:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-18 10:52:23,268 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:23,268 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] [2023-02-18 10:52:23,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:23,476 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 [2023-02-18 10:52:23,476 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2023-02-18 10:52:23,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:23,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633957213] [2023-02-18 10:52:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:23,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:23,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-18 10:52:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:23,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-02-18 10:52:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:23,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-02-18 10:52:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:52:23,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633957213] [2023-02-18 10:52:23,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633957213] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262883290] [2023-02-18 10:52:23,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 10:52:23,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:23,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:23,953 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) [2023-02-18 10:52:23,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 10:52:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:24,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 10:52:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:52:24,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:52:24,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262883290] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:24,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:24,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-18 10:52:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224943959] [2023-02-18 10:52:24,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 10:52:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 10:52:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 10:52:24,529 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 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) [2023-02-18 10:52:24,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:24,610 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2023-02-18 10:52:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 10:52:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 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 [2023-02-18 10:52:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:24,613 INFO L225 Difference]: With dead ends: 207 [2023-02-18 10:52:24,614 INFO L226 Difference]: Without dead ends: 135 [2023-02-18 10:52:24,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 312 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 10:52:24,615 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:24,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:52:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-18 10:52:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-02-18 10:52:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 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) [2023-02-18 10:52:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2023-02-18 10:52:24,627 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2023-02-18 10:52:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:24,627 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2023-02-18 10:52:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 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) [2023-02-18 10:52:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2023-02-18 10:52:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-02-18 10:52:24,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:24,630 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:52:24,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:24,837 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 [2023-02-18 10:52:24,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:24,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2023-02-18 10:52:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:24,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240355488] [2023-02-18 10:52:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:24,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:25,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-18 10:52:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-02-18 10:52:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:25,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2023-02-18 10:52:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:52:25,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240355488] [2023-02-18 10:52:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240355488] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779078100] [2023-02-18 10:52:25,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:52:25,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:25,838 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) [2023-02-18 10:52:25,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 10:52:26,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:52:26,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 10:52:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:52:26,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:52:27,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779078100] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:27,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:27,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-02-18 10:52:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216879113] [2023-02-18 10:52:27,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:27,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-18 10:52:27,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-18 10:52:27,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 10:52:27,439 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 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) [2023-02-18 10:52:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:27,592 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2023-02-18 10:52:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-18 10:52:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 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 200 [2023-02-18 10:52:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:27,595 INFO L225 Difference]: With dead ends: 271 [2023-02-18 10:52:27,596 INFO L226 Difference]: Without dead ends: 199 [2023-02-18 10:52:27,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 344 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 10:52:27,598 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:27,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 178 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:52:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-18 10:52:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2023-02-18 10:52:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 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) [2023-02-18 10:52:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2023-02-18 10:52:27,606 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2023-02-18 10:52:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:27,606 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2023-02-18 10:52:27,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 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) [2023-02-18 10:52:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2023-02-18 10:52:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-02-18 10:52:27,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:27,609 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:52:27,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:27,816 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 [2023-02-18 10:52:27,817 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:27,817 INFO L85 PathProgramCache]: Analyzing trace with hash -148428801, now seen corresponding path program 9 times [2023-02-18 10:52:27,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:27,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784723957] [2023-02-18 10:52:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:27,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:30,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-02-18 10:52:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:30,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2023-02-18 10:52:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:30,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-02-18 10:52:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:52:30,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784723957] [2023-02-18 10:52:30,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784723957] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877840546] [2023-02-18 10:52:30,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:52:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:30,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:30,681 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) [2023-02-18 10:52:30,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 10:52:33,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 10:52:33,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:33,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 10:52:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2023-02-18 10:52:34,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2023-02-18 10:52:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877840546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:34,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:34,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2023-02-18 10:52:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123510684] [2023-02-18 10:52:34,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-02-18 10:52:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-02-18 10:52:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 10:52:34,673 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 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) [2023-02-18 10:52:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:34,883 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2023-02-18 10:52:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 10:52:34,884 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 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 264 [2023-02-18 10:52:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:34,888 INFO L225 Difference]: With dead ends: 306 [2023-02-18 10:52:34,888 INFO L226 Difference]: Without dead ends: 234 [2023-02-18 10:52:34,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 10:52:34,891 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:34,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 10:52:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-18 10:52:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2023-02-18 10:52:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 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) [2023-02-18 10:52:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2023-02-18 10:52:34,899 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2023-02-18 10:52:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:34,900 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2023-02-18 10:52:34,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 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) [2023-02-18 10:52:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2023-02-18 10:52:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-02-18 10:52:34,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:34,904 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:52:34,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:35,114 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 [2023-02-18 10:52:35,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2022869279, now seen corresponding path program 10 times [2023-02-18 10:52:35,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:35,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489178673] [2023-02-18 10:52:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:35,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:38,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-02-18 10:52:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2023-02-18 10:52:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:38,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2023-02-18 10:52:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2023-02-18 10:52:38,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489178673] [2023-02-18 10:52:38,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489178673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:38,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612565185] [2023-02-18 10:52:38,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:52:38,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:38,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:38,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:52:38,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 10:52:38,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:52:38,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:52:38,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 10:52:38,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:52:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2023-02-18 10:52:39,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:52:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 1864 proven. 2764 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2023-02-18 10:52:41,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612565185] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:52:41,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:52:41,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 33] total 128 [2023-02-18 10:52:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610011753] [2023-02-18 10:52:41,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:52:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-02-18 10:52:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:52:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-02-18 10:52:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2023-02-18 10:52:41,403 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 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) [2023-02-18 10:52:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:52:41,696 INFO L93 Difference]: Finished difference Result 404 states and 447 transitions. [2023-02-18 10:52:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-02-18 10:52:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 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 362 [2023-02-18 10:52:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:52:41,703 INFO L225 Difference]: With dead ends: 404 [2023-02-18 10:52:41,703 INFO L226 Difference]: Without dead ends: 300 [2023-02-18 10:52:41,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2023-02-18 10:52:41,707 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 10:52:41,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 202 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 10:52:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-02-18 10:52:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2023-02-18 10:52:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 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) [2023-02-18 10:52:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2023-02-18 10:52:41,715 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 362 [2023-02-18 10:52:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:52:41,716 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2023-02-18 10:52:41,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 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) [2023-02-18 10:52:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2023-02-18 10:52:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2023-02-18 10:52:41,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:52:41,724 INFO L195 NwaCegarLoop]: trace histogram [186, 186, 64, 64, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:52:41,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 10:52:41,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 10:52:41,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:52:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:52:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 686301475, now seen corresponding path program 11 times [2023-02-18 10:52:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:52:41,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516360977] [2023-02-18 10:52:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:52:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:52:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:45,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-02-18 10:52:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2023-02-18 10:52:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2023-02-18 10:52:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:52:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 39275 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 35179 trivial. 0 not checked. [2023-02-18 10:52:45,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:52:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516360977] [2023-02-18 10:52:45,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516360977] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:52:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42822657] [2023-02-18 10:52:45,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 10:52:45,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:52:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:52:45,153 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:52:45,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process