./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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-simple/id_o20.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 78daae7f2fbb1fbd12685beb952877b8686cc8bc3d2c7fcd55d0c5d2b019aa0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:41:58,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:41:58,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:41:58,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:41:58,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:41:58,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:41:58,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:41:58,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:41:58,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:41:58,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:41:58,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:41:58,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:41:58,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:41:58,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:41:58,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:41:58,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:41:58,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:41:58,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:41:58,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:41:58,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:41:58,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:41:58,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:41:58,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:41:58,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:41:58,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:41:58,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:41:58,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:41:58,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:41:58,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:41:58,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:41:58,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:41:58,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:41:58,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:41:58,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:41:58,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:41:58,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:41:58,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:41:58,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:41:58,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:41:58,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:41:58,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:41:58,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:41:58,616 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:41:58,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:41:58,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:41:58,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:41:58,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:41:58,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:41:58,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:41:58,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:41:58,619 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:41:58,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:41:58,620 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:41:58,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:41:58,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:41:58,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:41:58,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:41:58,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:41:58,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:41:58,621 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:41:58,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:41:58,621 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:41:58,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:41:58,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:41:58,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:41:58,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:41:58,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:41:58,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:41:58,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:41:58,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:41:58,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:41:58,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:41:58,624 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:41:58,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:41:58,624 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:41:58,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:41:58,624 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:41:58,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78daae7f2fbb1fbd12685beb952877b8686cc8bc3d2c7fcd55d0c5d2b019aa0d [2023-02-15 12:41:58,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:41:58,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:41:58,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:41:58,834 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:41:58,835 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:41:58,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o20.c [2023-02-15 12:41:59,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:42:00,143 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:42:00,144 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o20.c [2023-02-15 12:42:00,149 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f7ea441/1559e2a36238492e835e21039ebc5f15/FLAG9bda52ac7 [2023-02-15 12:42:00,160 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f7ea441/1559e2a36238492e835e21039ebc5f15 [2023-02-15 12:42:00,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:42:00,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:42:00,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:42:00,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:42:00,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:42:00,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a54000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00, skipping insertion in model container [2023-02-15 12:42:00,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:42:00,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:42:00,294 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-simple/id_o20.c[516,529] [2023-02-15 12:42:00,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:42:00,306 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:42:00,316 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-simple/id_o20.c[516,529] [2023-02-15 12:42:00,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:42:00,327 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:42:00,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00 WrapperNode [2023-02-15 12:42:00,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:42:00,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:42:00,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:42:00,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:42:00,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,352 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2023-02-15 12:42:00,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:42:00,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:42:00,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:42:00,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:42:00,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:42:00,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:42:00,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:42:00,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:42:00,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (1/1) ... [2023-02-15 12:42:00,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:42:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:42:00,395 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) [2023-02-15 12:42:00,408 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 [2023-02-15 12:42:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:42:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:42:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:42:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:42:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-02-15 12:42:00,431 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-02-15 12:42:00,491 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:42:00,493 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:42:00,633 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:42:00,645 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:42:00,645 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 12:42:00,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:42:00 BoogieIcfgContainer [2023-02-15 12:42:00,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:42:00,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:42:00,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:42:00,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:42:00,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:42:00" (1/3) ... [2023-02-15 12:42:00,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4ef454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:42:00, skipping insertion in model container [2023-02-15 12:42:00,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:42:00" (2/3) ... [2023-02-15 12:42:00,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4ef454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:42:00, skipping insertion in model container [2023-02-15 12:42:00,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:42:00" (3/3) ... [2023-02-15 12:42:00,657 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o20.c [2023-02-15 12:42:00,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:42:00,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 12:42:00,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:42:00,746 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;@40b0a839, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:42:00,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 12:42:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 12:42:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 12:42:00,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:42:00,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:42:00,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:42:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:42:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2023-02-15 12:42:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:42:00,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557054811] [2023-02-15 12:42:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:42:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:42:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:01,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:42:01,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:42:01,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557054811] [2023-02-15 12:42:01,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557054811] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:42:01,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:42:01,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:42:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318208772] [2023-02-15 12:42:01,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:42:01,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:42:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:42:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:42:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:42:01,157 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-15 12:42:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:42:01,228 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-15 12:42:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:42:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2023-02-15 12:42:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:42:01,241 INFO L225 Difference]: With dead ends: 28 [2023-02-15 12:42:01,241 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 12:42:01,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:42:01,256 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:42:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:42:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 12:42:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 12:42:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 12:42:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-02-15 12:42:01,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-02-15 12:42:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:42:01,296 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-02-15 12:42:01,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-15 12:42:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-02-15 12:42:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 12:42:01,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:42:01,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:42:01,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:42:01,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:42:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:42:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2023-02-15 12:42:01,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:42:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327654236] [2023-02-15 12:42:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:42:01,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:42:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:01,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:42:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:42:01,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327654236] [2023-02-15 12:42:01,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327654236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:42:01,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050591594] [2023-02-15 12:42:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:42:01,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:42:01,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:42:01,643 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) [2023-02-15 12:42:01,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:42:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 12:42:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:42:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:42:01,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:42:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:42:02,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050591594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:42:02,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:42:02,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 12:42:02,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551718449] [2023-02-15 12:42:02,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:42:02,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 12:42:02,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:42:02,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 12:42:02,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:42:02,010 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:42:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:42:02,072 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-02-15 12:42:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:42:02,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2023-02-15 12:42:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:42:02,075 INFO L225 Difference]: With dead ends: 27 [2023-02-15 12:42:02,075 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 12:42:02,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:42:02,082 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:42:02,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:42:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 12:42:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-15 12:42:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 12:42:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-15 12:42:02,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2023-02-15 12:42:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:42:02,092 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-15 12:42:02,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:42:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-15 12:42:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 12:42:02,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:42:02,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:42:02,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:42:02,297 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 [2023-02-15 12:42:02,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:42:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:42:02,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2023-02-15 12:42:02,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:42:02,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151630410] [2023-02-15 12:42:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:42:02,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:42:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:02,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:02,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:02,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:42:02,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:42:02,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151630410] [2023-02-15 12:42:02,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151630410] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:42:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213722627] [2023-02-15 12:42:02,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:42:02,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:42:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:42:02,717 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) [2023-02-15 12:42:02,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:42:02,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:42:02,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:42:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:42:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:42:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:42:02,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:42:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:42:03,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213722627] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:42:03,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:42:03,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-15 12:42:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544968727] [2023-02-15 12:42:03,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:42:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:42:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:42:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:42:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-15 12:42:03,168 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 12:42:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:42:03,375 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-02-15 12:42:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 12:42:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2023-02-15 12:42:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:42:03,376 INFO L225 Difference]: With dead ends: 39 [2023-02-15 12:42:03,376 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 12:42:03,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-02-15 12:42:03,378 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:42:03,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:42:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 12:42:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 12:42:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 12:42:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-15 12:42:03,391 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-02-15 12:42:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:42:03,391 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-15 12:42:03,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 12:42:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-15 12:42:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 12:42:03,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:42:03,394 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:42:03,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 12:42:03,599 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 [2023-02-15 12:42:03,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:42:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:42:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2023-02-15 12:42:03,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:42:03,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251678448] [2023-02-15 12:42:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:42:03,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:42:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:03,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:03,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:03,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:03,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:04,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:04,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:04,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 12:42:04,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:42:04,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251678448] [2023-02-15 12:42:04,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251678448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:42:04,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967380541] [2023-02-15 12:42:04,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:42:04,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:42:04,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:42:04,279 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) [2023-02-15 12:42:04,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:42:04,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 12:42:04,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:42:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 12:42:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:42:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 12:42:04,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:42:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 12:42:05,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967380541] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:42:05,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:42:05,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-15 12:42:05,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600643864] [2023-02-15 12:42:05,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:42:05,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 12:42:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:42:05,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 12:42:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 12:42:05,279 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-15 12:42:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:42:07,768 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-02-15 12:42:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 12:42:07,770 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2023-02-15 12:42:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:42:07,771 INFO L225 Difference]: With dead ends: 63 [2023-02-15 12:42:07,771 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 12:42:07,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 12:42:07,773 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:42:07,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:42:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 12:42:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-15 12:42:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-02-15 12:42:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-15 12:42:07,782 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2023-02-15 12:42:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:42:07,783 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-15 12:42:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-15 12:42:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-15 12:42:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-15 12:42:07,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:42:07,786 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:42:07,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:42:07,991 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 [2023-02-15 12:42:07,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:42:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:42:07,992 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 4 times [2023-02-15 12:42:07,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:42:07,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181788293] [2023-02-15 12:42:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:42:07,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:42:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:08,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:08,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:08,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:08,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:09,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:10,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:42:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:42:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 12:42:10,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:42:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181788293] [2023-02-15 12:42:10,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181788293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:42:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278257275] [2023-02-15 12:42:10,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:42:10,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:42:10,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:42:10,085 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) [2023-02-15 12:42:10,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:42:10,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:42:10,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:42:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 12:42:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:42:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 12:42:10,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:42:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 12:42:12,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278257275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:42:12,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:42:12,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-02-15 12:42:12,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682487658] [2023-02-15 12:42:12,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:42:12,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-15 12:42:12,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:42:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-15 12:42:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 12:42:12,822 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-15 12:42:25,822 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:42:38,680 WARN L233 SmtUtils]: Spent 8.58s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:42:52,117 WARN L233 SmtUtils]: Spent 10.25s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:43:03,047 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:43:12,085 WARN L233 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:43:20,263 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:43:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:43:57,438 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-02-15 12:43:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 12:43:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 100 [2023-02-15 12:43:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:43:57,441 INFO L225 Difference]: With dead ends: 111 [2023-02-15 12:43:57,441 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 12:43:57,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 103.5s TimeCoverageRelationStatistics Valid=1291, Invalid=8021, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 12:43:57,444 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-15 12:43:57,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1014 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-02-15 12:43:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 12:43:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-15 12:43:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (34), 32 states have call predecessors, (34), 2 states have call successors, (34) [2023-02-15 12:43:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2023-02-15 12:43:57,459 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2023-02-15 12:43:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:43:57,460 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2023-02-15 12:43:57,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-15 12:43:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2023-02-15 12:43:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-15 12:43:57,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:43:57,464 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:43:57,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:43:57,668 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 [2023-02-15 12:43:57,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:43:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:43:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 5 times [2023-02-15 12:43:57,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:43:57,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830555283] [2023-02-15 12:43:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:43:57,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:43:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 12:43:57,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 12:43:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 12:43:57,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 12:43:57,857 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 12:43:57,859 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 12:43:57,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 12:43:57,863 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-02-15 12:43:57,869 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 12:43:57,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 12:43:57 BoogieIcfgContainer [2023-02-15 12:43:57,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 12:43:57,933 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 12:43:57,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 12:43:57,933 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 12:43:57,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:42:00" (3/4) ... [2023-02-15 12:43:57,935 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 12:43:57,995 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 12:43:57,995 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 12:43:57,996 INFO L158 Benchmark]: Toolchain (without parser) took 117832.20ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 86.6MB in the beginning and 72.2MB in the end (delta: 14.4MB). Peak memory consumption was 47.6MB. Max. memory is 16.1GB. [2023-02-15 12:43:57,996 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 95.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 12:43:57,997 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.96ms. Allocated memory is still 127.9MB. Free memory was 86.3MB in the beginning and 76.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 12:43:57,997 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.96ms. Allocated memory is still 127.9MB. Free memory was 76.6MB in the beginning and 75.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 12:43:57,997 INFO L158 Benchmark]: Boogie Preprocessor took 13.00ms. Allocated memory is still 127.9MB. Free memory was 75.3MB in the beginning and 74.4MB in the end (delta: 877.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 12:43:57,997 INFO L158 Benchmark]: RCFGBuilder took 280.19ms. Allocated memory is still 127.9MB. Free memory was 74.4MB in the beginning and 65.3MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 12:43:57,998 INFO L158 Benchmark]: TraceAbstraction took 117283.58ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 64.9MB in the beginning and 76.4MB in the end (delta: -11.5MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2023-02-15 12:43:57,998 INFO L158 Benchmark]: Witness Printer took 62.28ms. Allocated memory is still 159.4MB. Free memory was 76.4MB in the beginning and 72.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 12:43:58,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 95.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.96ms. Allocated memory is still 127.9MB. Free memory was 86.3MB in the beginning and 76.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.96ms. Allocated memory is still 127.9MB. Free memory was 76.6MB in the beginning and 75.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.00ms. Allocated memory is still 127.9MB. Free memory was 75.3MB in the beginning and 74.4MB in the end (delta: 877.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 280.19ms. Allocated memory is still 127.9MB. Free memory was 74.4MB in the beginning and 65.3MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 117283.58ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 64.9MB in the beginning and 76.4MB in the end (delta: -11.5MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * Witness Printer took 62.28ms. Allocated memory is still 159.4MB. Free memory was 76.4MB in the beginning and 72.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=20, input=20] [L13] unsigned int result = id(input); [L14] COND TRUE result == 20 VAL [input=20, result=20] [L15] reach_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 117.1s, OverallIterations: 6, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 107.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 1698 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1577 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1495 IncrementalHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 121 mSDtfsCounter, 1495 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 567 GetRequests, 384 SyntacticMatches, 4 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 107.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=5, InterpolantAutomatonStates: 137, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 532 NumberOfCodeBlocks, 532 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 585 ConstructedInterpolants, 0 QuantifiedInterpolants, 2375 SizeOfPredicates, 4 NumberOfNonLiveVariables, 488 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 1317/2634 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 RESULT: Ultimate proved your program to be incorrect! [2023-02-15 12:43:58,033 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE