./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/recursive/Ackermann04.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:54:53,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:54:53,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:54:53,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:54:53,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:54:53,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:54:53,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:54:53,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:54:53,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:54:53,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:54:53,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:54:53,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:54:53,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:54:53,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:54:53,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:54:53,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:54:53,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:54:53,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:54:53,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:54:53,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:54:53,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:54:53,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:54:53,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:54:53,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:54:53,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:54:53,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:54:53,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:54:53,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:54:53,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:54:53,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:54:53,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:54:53,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:54:53,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:54:53,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:54:53,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:54:53,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:54:53,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:54:53,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:54:53,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:54:53,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:54:53,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:54:53,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:54:53,720 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:54:53,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:54:53,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:54:53,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:54:53,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:54:53,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:54:53,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:54:53,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:54:53,722 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:54:53,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:54:53,723 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:54:53,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:54:53,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:54:53,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:54:53,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:54:53,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:54:53,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:54:53,724 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:54:53,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:54:53,724 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:54:53,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:54:53,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:54:53,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:54:53,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:54:53,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:54:53,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:54:53,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:54:53,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:54:53,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:54:53,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:54:53,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:54:53,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:54:53,726 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:54:53,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:54:53,726 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:54:53,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2023-02-16 02:54:53,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:54:53,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:54:53,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:54:53,955 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:54:53,955 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:54:53,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2023-02-16 02:54:54,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:54:55,121 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:54:55,121 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2023-02-16 02:54:55,128 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d38137a/c5dd2d32acbb4860a661240a051db5a0/FLAGceac61024 [2023-02-16 02:54:55,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d38137a/c5dd2d32acbb4860a661240a051db5a0 [2023-02-16 02:54:55,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:54:55,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:54:55,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:54:55,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:54:55,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:54:55,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb003df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55, skipping insertion in model container [2023-02-16 02:54:55,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:54:55,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:54:55,291 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/recursive/Ackermann04.c[1166,1179] [2023-02-16 02:54:55,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:54:55,303 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:54:55,316 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/recursive/Ackermann04.c[1166,1179] [2023-02-16 02:54:55,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:54:55,329 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:54:55,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55 WrapperNode [2023-02-16 02:54:55,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:54:55,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:54:55,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:54:55,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:54:55,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,350 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-16 02:54:55,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:54:55,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:54:55,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:54:55,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:54:55,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:54:55,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:54:55,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:54:55,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:54:55,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (1/1) ... [2023-02-16 02:54:55,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:54:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:55,418 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) [2023-02-16 02:54:55,450 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 [2023-02-16 02:54:55,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:54:55,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:54:55,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:54:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-16 02:54:55,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-16 02:54:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:54:55,506 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:54:55,508 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:54:55,596 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:54:55,600 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:54:55,600 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-16 02:54:55,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:54:55 BoogieIcfgContainer [2023-02-16 02:54:55,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:54:55,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:54:55,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:54:55,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:54:55,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:54:55" (1/3) ... [2023-02-16 02:54:55,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7ceefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:54:55, skipping insertion in model container [2023-02-16 02:54:55,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:55" (2/3) ... [2023-02-16 02:54:55,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7ceefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:54:55, skipping insertion in model container [2023-02-16 02:54:55,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:54:55" (3/3) ... [2023-02-16 02:54:55,607 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2023-02-16 02:54:55,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:54:55,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:54:55,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:54:55,659 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;@53401d54, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:54:55,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:54:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 02:54:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 02:54:55,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:55,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:55,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:55,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2023-02-16 02:54:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:55,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899870296] [2023-02-16 02:54:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:54:55,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899870296] [2023-02-16 02:54:55,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899870296] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:54:55,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:54:55,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:54:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956651044] [2023-02-16 02:54:55,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:54:55,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:54:55,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:56,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:54:56,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:54:56,033 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 02:54:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:54:56,151 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2023-02-16 02:54:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 02:54:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-16 02:54:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:54:56,159 INFO L225 Difference]: With dead ends: 51 [2023-02-16 02:54:56,159 INFO L226 Difference]: Without dead ends: 25 [2023-02-16 02:54:56,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:54:56,166 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:54:56,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:54:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-16 02:54:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-16 02:54:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-16 02:54:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-02-16 02:54:56,193 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-02-16 02:54:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:54:56,194 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-02-16 02:54:56,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 02:54:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-02-16 02:54:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 02:54:56,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:56,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:56,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 02:54:56,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2023-02-16 02:54:56,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:56,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144435583] [2023-02-16 02:54:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:54:56,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:56,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144435583] [2023-02-16 02:54:56,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144435583] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:54:56,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696169948] [2023-02-16 02:54:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:56,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:56,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:56,373 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) [2023-02-16 02:54:56,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:54:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 02:54:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:54:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:54:56,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:54:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:54:56,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696169948] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:54:56,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:54:56,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-16 02:54:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388900741] [2023-02-16 02:54:56,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:54:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 02:54:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 02:54:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:54:56,616 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 02:54:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:54:56,732 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2023-02-16 02:54:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 02:54:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 19 [2023-02-16 02:54:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:54:56,734 INFO L225 Difference]: With dead ends: 74 [2023-02-16 02:54:56,735 INFO L226 Difference]: Without dead ends: 50 [2023-02-16 02:54:56,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-02-16 02:54:56,736 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:54:56,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:54:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-16 02:54:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-16 02:54:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-16 02:54:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2023-02-16 02:54:56,746 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 19 [2023-02-16 02:54:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:54:56,746 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2023-02-16 02:54:56,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 02:54:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2023-02-16 02:54:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 02:54:56,749 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:56,749 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:56,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 02:54:56,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:56,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2023-02-16 02:54:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:56,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794807249] [2023-02-16 02:54:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:56,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:54:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 02:54:57,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:57,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794807249] [2023-02-16 02:54:57,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794807249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:54:57,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960773811] [2023-02-16 02:54:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:57,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:57,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:57,167 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) [2023-02-16 02:54:57,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:54:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:57,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 02:54:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:54:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-16 02:54:57,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:54:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 02:54:57,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960773811] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:54:57,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:54:57,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-16 02:54:57,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918628695] [2023-02-16 02:54:57,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:54:57,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 02:54:57,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 02:54:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-16 02:54:57,709 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-16 02:54:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:54:57,786 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2023-02-16 02:54:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 02:54:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2023-02-16 02:54:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:54:57,789 INFO L225 Difference]: With dead ends: 120 [2023-02-16 02:54:57,789 INFO L226 Difference]: Without dead ends: 53 [2023-02-16 02:54:57,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:54:57,791 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:54:57,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 81 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:54:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-16 02:54:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-16 02:54:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-16 02:54:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2023-02-16 02:54:57,800 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2023-02-16 02:54:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:54:57,800 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2023-02-16 02:54:57,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-16 02:54:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2023-02-16 02:54:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-16 02:54:57,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:57,804 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:57,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 02:54:58,009 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,SelfDestructingSolverStorable2 [2023-02-16 02:54:58,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2049356910, now seen corresponding path program 2 times [2023-02-16 02:54:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:58,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397881613] [2023-02-16 02:54:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:54:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-16 02:54:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 127 proven. 266 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 02:54:58,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:58,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397881613] [2023-02-16 02:54:58,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397881613] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:54:58,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957927159] [2023-02-16 02:54:58,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:54:58,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:58,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:58,683 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) [2023-02-16 02:54:58,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:54:58,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:54:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:54:58,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 02:54:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:54:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-02-16 02:54:58,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:54:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-02-16 02:54:59,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957927159] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:54:59,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:54:59,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2023-02-16 02:54:59,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979837751] [2023-02-16 02:54:59,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:54:59,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 02:54:59,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 02:54:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-02-16 02:54:59,834 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 26 states have internal predecessors, (75), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-16 02:55:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:00,521 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2023-02-16 02:55:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-16 02:55:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 26 states have internal predecessors, (75), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) Word has length 119 [2023-02-16 02:55:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:00,531 INFO L225 Difference]: With dead ends: 126 [2023-02-16 02:55:00,531 INFO L226 Difference]: Without dead ends: 78 [2023-02-16 02:55:00,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 02:55:00,536 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:00,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 177 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:55:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-16 02:55:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-02-16 02:55:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (46), 16 states have call predecessors, (46), 13 states have call successors, (46) [2023-02-16 02:55:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 117 transitions. [2023-02-16 02:55:00,568 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 117 transitions. Word has length 119 [2023-02-16 02:55:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:00,569 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 117 transitions. [2023-02-16 02:55:00,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 26 states have internal predecessors, (75), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-16 02:55:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 117 transitions. [2023-02-16 02:55:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-16 02:55:00,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:00,571 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:00,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 02:55:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:00,779 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1538229242, now seen corresponding path program 3 times [2023-02-16 02:55:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817776347] [2023-02-16 02:55:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:00,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-16 02:55:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 125 proven. 275 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-16 02:55:01,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:01,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817776347] [2023-02-16 02:55:01,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817776347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:01,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322293689] [2023-02-16 02:55:01,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:55:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:01,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:01,272 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) [2023-02-16 02:55:01,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 02:55:01,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-16 02:55:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 02:55:01,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 484 proven. 71 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-16 02:55:01,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 131 proven. 269 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-16 02:55:02,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322293689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:02,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:02,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 27 [2023-02-16 02:55:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32649586] [2023-02-16 02:55:02,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:02,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 02:55:02,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 02:55:02,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-02-16 02:55:02,537 INFO L87 Difference]: Start difference. First operand 77 states and 117 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2023-02-16 02:55:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:02,829 INFO L93 Difference]: Finished difference Result 153 states and 265 transitions. [2023-02-16 02:55:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 02:55:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) Word has length 131 [2023-02-16 02:55:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:02,831 INFO L225 Difference]: With dead ends: 153 [2023-02-16 02:55:02,831 INFO L226 Difference]: Without dead ends: 85 [2023-02-16 02:55:02,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 282 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:55:02,833 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:02,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 163 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-16 02:55:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-16 02:55:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (46), 16 states have call predecessors, (46), 15 states have call successors, (46) [2023-02-16 02:55:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2023-02-16 02:55:02,841 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 131 [2023-02-16 02:55:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:02,841 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2023-02-16 02:55:02,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2023-02-16 02:55:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2023-02-16 02:55:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-16 02:55:02,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:02,843 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:02,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:03,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:03,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:03,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1811622132, now seen corresponding path program 4 times [2023-02-16 02:55:03,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:03,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635620412] [2023-02-16 02:55:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:03,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-02-16 02:55:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 152 proven. 295 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-16 02:55:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635620412] [2023-02-16 02:55:03,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635620412] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:03,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434243909] [2023-02-16 02:55:03,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:55:03,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:03,518 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) [2023-02-16 02:55:03,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 02:55:03,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:55:03,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 02:55:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-16 02:55:03,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-16 02:55:04,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434243909] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:04,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:04,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2023-02-16 02:55:04,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264816950] [2023-02-16 02:55:04,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:04,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 02:55:04,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 02:55:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-02-16 02:55:04,863 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-16 02:55:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:05,182 INFO L93 Difference]: Finished difference Result 176 states and 301 transitions. [2023-02-16 02:55:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-16 02:55:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 131 [2023-02-16 02:55:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:05,184 INFO L225 Difference]: With dead ends: 176 [2023-02-16 02:55:05,184 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 02:55:05,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 279 SyntacticMatches, 14 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:55:05,186 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:05,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:55:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 02:55:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-16 02:55:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2023-02-16 02:55:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 152 transitions. [2023-02-16 02:55:05,202 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 152 transitions. Word has length 131 [2023-02-16 02:55:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:05,203 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 152 transitions. [2023-02-16 02:55:05,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-16 02:55:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 152 transitions. [2023-02-16 02:55:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-16 02:55:05,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:05,206 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:05,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:05,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:05,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 5 times [2023-02-16 02:55:05,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:05,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535564694] [2023-02-16 02:55:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:05,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:05,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 445 proven. 284 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-16 02:55:06,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535564694] [2023-02-16 02:55:06,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535564694] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511252971] [2023-02-16 02:55:06,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:55:06,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:06,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:06,229 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) [2023-02-16 02:55:06,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 02:55:06,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-16 02:55:06,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 02:55:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2023-02-16 02:55:06,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-02-16 02:55:09,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511252971] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:09,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:09,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2023-02-16 02:55:09,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113565551] [2023-02-16 02:55:09,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:09,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 02:55:09,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 02:55:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 02:55:09,186 INFO L87 Difference]: Start difference. First operand 100 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-16 02:55:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:09,687 INFO L93 Difference]: Finished difference Result 206 states and 359 transitions. [2023-02-16 02:55:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 02:55:09,688 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 157 [2023-02-16 02:55:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:09,690 INFO L225 Difference]: With dead ends: 206 [2023-02-16 02:55:09,690 INFO L226 Difference]: Without dead ends: 115 [2023-02-16 02:55:09,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 328 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=799, Invalid=3361, Unknown=0, NotChecked=0, Total=4160 [2023-02-16 02:55:09,692 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:09,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 248 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:55:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-16 02:55:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-16 02:55:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.105263157894737) internal successors, (84), 77 states have internal predecessors, (84), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2023-02-16 02:55:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 185 transitions. [2023-02-16 02:55:09,713 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 185 transitions. Word has length 157 [2023-02-16 02:55:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:09,715 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 185 transitions. [2023-02-16 02:55:09,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-16 02:55:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 185 transitions. [2023-02-16 02:55:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-16 02:55:09,717 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:09,717 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:09,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:09,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:09,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 6 times [2023-02-16 02:55:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:09,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327904770] [2023-02-16 02:55:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:11,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:11,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-02-16 02:55:11,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:11,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327904770] [2023-02-16 02:55:11,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327904770] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:11,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141644274] [2023-02-16 02:55:11,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:55:11,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:11,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:11,013 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) [2023-02-16 02:55:11,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 02:55:11,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-02-16 02:55:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 02:55:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2023-02-16 02:55:11,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2023-02-16 02:55:15,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141644274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:15,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:15,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 38 [2023-02-16 02:55:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082624445] [2023-02-16 02:55:15,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:15,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 02:55:15,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 02:55:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 02:55:15,457 INFO L87 Difference]: Start difference. First operand 115 states and 185 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-16 02:55:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:16,186 INFO L93 Difference]: Finished difference Result 155 states and 272 transitions. [2023-02-16 02:55:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 02:55:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) Word has length 183 [2023-02-16 02:55:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:16,190 INFO L225 Difference]: With dead ends: 155 [2023-02-16 02:55:16,190 INFO L226 Difference]: Without dead ends: 151 [2023-02-16 02:55:16,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 391 SyntacticMatches, 20 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=3450, Unknown=0, NotChecked=0, Total=4160 [2023-02-16 02:55:16,192 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:16,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 277 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:55:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-16 02:55:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2023-02-16 02:55:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 92 states have internal predecessors, (99), 22 states have call successors, (22), 9 states have call predecessors, (22), 24 states have return successors, (121), 36 states have call predecessors, (121), 22 states have call successors, (121) [2023-02-16 02:55:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 242 transitions. [2023-02-16 02:55:16,214 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 242 transitions. Word has length 183 [2023-02-16 02:55:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:16,214 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 242 transitions. [2023-02-16 02:55:16,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-16 02:55:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 242 transitions. [2023-02-16 02:55:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-02-16 02:55:16,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:16,217 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:16,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:16,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:16,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:16,425 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 7 times [2023-02-16 02:55:16,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:16,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704945829] [2023-02-16 02:55:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:16,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:16,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 502 proven. 372 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-02-16 02:55:17,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704945829] [2023-02-16 02:55:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704945829] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428789574] [2023-02-16 02:55:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:55:17,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:17,697 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) [2023-02-16 02:55:17,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 02:55:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-16 02:55:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2023-02-16 02:55:18,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-16 02:55:20,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428789574] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:20,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:20,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2023-02-16 02:55:20,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114694013] [2023-02-16 02:55:20,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:20,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-16 02:55:20,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:20,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-16 02:55:20,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 02:55:20,431 INFO L87 Difference]: Start difference. First operand 138 states and 242 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-16 02:55:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:21,028 INFO L93 Difference]: Finished difference Result 255 states and 507 transitions. [2023-02-16 02:55:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-16 02:55:21,029 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) Word has length 170 [2023-02-16 02:55:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:21,030 INFO L225 Difference]: With dead ends: 255 [2023-02-16 02:55:21,030 INFO L226 Difference]: Without dead ends: 0 [2023-02-16 02:55:21,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 355 SyntacticMatches, 26 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=865, Invalid=3295, Unknown=0, NotChecked=0, Total=4160 [2023-02-16 02:55:21,034 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:21,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 192 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:55:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-16 02:55:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-16 02:55:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-16 02:55:21,036 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2023-02-16 02:55:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:21,036 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-16 02:55:21,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-16 02:55:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-16 02:55:21,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-16 02:55:21,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-16 02:55:21,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:21,257 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,SelfDestructingSolverStorable8 [2023-02-16 02:55:21,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-16 02:55:22,036 INFO L902 garLoopResultBuilder]: At program point L27(lines 27 47) the Hoare annotation is: true [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2023-02-16 02:55:22,036 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L902 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: true [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 40) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L895 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (or (not (= |ackermann_#in~m| 0)) (not (<= |ackermann_#in~n| 1))) (= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|)) [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L895 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|)) [2023-02-16 02:55:22,037 INFO L895 garLoopResultBuilder]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= |ackermann_#in~m| 0))) (and (or (not (<= |ackermann_#in~n| 0)) .cse0) (let ((.cse1 (<= 5 |ackermann_#t~ret5|)) (.cse5 (<= |ackermann_#in~m| 1)) (.cse3 (<= |ackermann_#in~n| 2)) (.cse6 (< |ackermann_#in~n| 2)) (.cse2 (= |ackermann_#in~m| ackermann_~m)) (.cse7 (<= 3 |ackermann_#t~ret5|)) (.cse4 (= ackermann_~n |ackermann_#in~n|))) (or (and .cse1 (<= |ackermann_#in~m| 2) .cse2 .cse3 (= |ackermann_#in~n| ackermann_~n)) (and (<= 6 |ackermann_#t~ret5|) .cse2 .cse4) (and .cse5 .cse1 .cse2 (<= |ackermann_#in~n| 4) .cse4) (and (<= |ackermann_#in~n| 3) .cse5 .cse2 .cse4 (<= 4 |ackermann_#t~ret5|)) (and .cse5 .cse6 .cse2 (<= 2 |ackermann_#t~ret5|) .cse4) (and .cse0 .cse4) (and .cse5 .cse2 .cse3 .cse7 .cse4) (and .cse6 .cse2 .cse7 .cse4))) (or (not (<= |ackermann_#in~m| 0)) (and (= ackermann_~m |ackermann_#in~m|) .cse0)))) [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 22) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point L23-3(line 23) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2023-02-16 02:55:22,037 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 24) the Hoare annotation is: true [2023-02-16 02:55:22,038 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2023-02-16 02:55:22,043 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2023-02-16 02:55:22,044 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-16 02:55:22,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:55:22 BoogieIcfgContainer [2023-02-16 02:55:22,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-16 02:55:22,051 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-16 02:55:22,051 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-16 02:55:22,052 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-16 02:55:22,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:54:55" (3/4) ... [2023-02-16 02:55:22,066 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-16 02:55:22,070 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2023-02-16 02:55:22,073 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-16 02:55:22,073 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-02-16 02:55:22,073 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-16 02:55:22,073 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-16 02:55:22,116 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-16 02:55:22,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-16 02:55:22,129 INFO L158 Benchmark]: Toolchain (without parser) took 26968.28ms. Allocated memory was 167.8MB in the beginning and 536.9MB in the end (delta: 369.1MB). Free memory was 118.9MB in the beginning and 270.6MB in the end (delta: -151.7MB). Peak memory consumption was 218.9MB. Max. memory is 16.1GB. [2023-02-16 02:55:22,129 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 167.8MB. Free memory was 128.1MB in the beginning and 128.1MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:55:22,129 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.88ms. Allocated memory is still 167.8MB. Free memory was 118.5MB in the beginning and 108.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 02:55:22,129 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.39ms. Allocated memory is still 167.8MB. Free memory was 108.7MB in the beginning and 107.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 02:55:22,129 INFO L158 Benchmark]: Boogie Preprocessor took 26.74ms. Allocated memory is still 167.8MB. Free memory was 107.4MB in the beginning and 106.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:55:22,130 INFO L158 Benchmark]: RCFGBuilder took 223.63ms. Allocated memory is still 167.8MB. Free memory was 106.3MB in the beginning and 95.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 02:55:22,130 INFO L158 Benchmark]: TraceAbstraction took 26447.73ms. Allocated memory was 167.8MB in the beginning and 536.9MB in the end (delta: 369.1MB). Free memory was 95.5MB in the beginning and 273.8MB in the end (delta: -178.3MB). Peak memory consumption was 193.7MB. Max. memory is 16.1GB. [2023-02-16 02:55:22,130 INFO L158 Benchmark]: Witness Printer took 64.43ms. Allocated memory is still 536.9MB. Free memory was 273.8MB in the beginning and 270.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 02:55:22,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 167.8MB. Free memory was 128.1MB in the beginning and 128.1MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.88ms. Allocated memory is still 167.8MB. Free memory was 118.5MB in the beginning and 108.7MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.39ms. Allocated memory is still 167.8MB. Free memory was 108.7MB in the beginning and 107.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.74ms. Allocated memory is still 167.8MB. Free memory was 107.4MB in the beginning and 106.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 223.63ms. Allocated memory is still 167.8MB. Free memory was 106.3MB in the beginning and 95.9MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 26447.73ms. Allocated memory was 167.8MB in the beginning and 536.9MB in the end (delta: 369.1MB). Free memory was 95.5MB in the beginning and 273.8MB in the end (delta: -178.3MB). Peak memory consumption was 193.7MB. Max. memory is 16.1GB. * Witness Printer took 64.43ms. Allocated memory is still 536.9MB. Free memory was 273.8MB in the beginning and 270.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.4s, OverallIterations: 9, TraceHistogramMax: 27, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 563 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 524 mSDsluCounter, 1519 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1300 mSDsCounter, 883 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3558 IncrementalHoareTripleChecker+Invalid, 4441 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 883 mSolverCounterUnsat, 219 mSDtfsCounter, 3558 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2475 GetRequests, 2022 SyntacticMatches, 95 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4629 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=8, InterpolantAutomatonStates: 206, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 462 PreInvPairs, 974 NumberOfFragments, 161 HoareAnnotationTreeSize, 462 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 6079 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 1922 NumberOfCodeBlocks, 1901 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2852 ConstructedInterpolants, 0 QuantifiedInterpolants, 5595 SizeOfPredicates, 63 NumberOfNonLiveVariables, 2894 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 16496/20640 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-16 02:55:22,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE