./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_b3_o2-2.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 18afe523baca40cb7d279a05e0d0a8c37efda6f4bcc6a4be698eb3701f39ab37 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 01:33:27,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 01:33:27,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 01:33:27,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 01:33:27,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 01:33:27,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 01:33:27,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 01:33:27,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 01:33:27,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 01:33:27,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 01:33:27,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 01:33:27,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 01:33:27,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 01:33:27,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 01:33:27,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 01:33:27,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 01:33:27,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 01:33:27,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 01:33:27,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 01:33:27,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 01:33:27,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 01:33:27,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 01:33:27,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 01:33:27,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 01:33:27,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 01:33:27,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 01:33:27,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 01:33:27,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 01:33:27,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 01:33:27,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 01:33:27,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 01:33:27,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 01:33:27,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 01:33:27,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 01:33:27,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 01:33:27,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 01:33:27,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 01:33:27,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 01:33:27,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 01:33:27,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 01:33:27,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 01:33:27,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 01:33:27,555 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 01:33:27,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 01:33:27,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 01:33:27,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 01:33:27,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 01:33:27,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 01:33:27,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 01:33:27,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 01:33:27,557 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 01:33:27,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 01:33:27,557 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 01:33:27,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 01:33:27,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 01:33:27,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 01:33:27,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 01:33:27,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 01:33:27,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 01:33:27,558 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 01:33:27,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 01:33:27,559 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 01:33:27,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 01:33:27,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 01:33:27,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 01:33:27,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 01:33:27,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:33:27,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 01:33:27,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 01:33:27,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 01:33:27,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 01:33:27,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 01:33:27,561 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 01:33:27,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 01:33:27,561 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 01:33:27,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 01:33:27,561 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 01:33:27,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18afe523baca40cb7d279a05e0d0a8c37efda6f4bcc6a4be698eb3701f39ab37 [2023-02-14 01:33:27,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 01:33:27,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 01:33:27,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 01:33:27,784 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 01:33:27,784 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 01:33:27,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2023-02-14 01:33:28,713 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 01:33:28,893 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 01:33:28,894 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2023-02-14 01:33:28,897 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ef3e32d/5c957ea82df248b3ad4ab24354d7b9a5/FLAG6159ea4f5 [2023-02-14 01:33:28,909 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ef3e32d/5c957ea82df248b3ad4ab24354d7b9a5 [2023-02-14 01:33:28,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 01:33:28,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 01:33:28,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 01:33:28,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 01:33:28,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 01:33:28,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:33:28" (1/1) ... [2023-02-14 01:33:28,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf0907f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:28, skipping insertion in model container [2023-02-14 01:33:28,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:33:28" (1/1) ... [2023-02-14 01:33:28,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 01:33:28,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 01:33:29,034 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_b3_o2-2.c[528,541] [2023-02-14 01:33:29,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:33:29,048 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 01:33:29,058 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_b3_o2-2.c[528,541] [2023-02-14 01:33:29,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:33:29,071 INFO L208 MainTranslator]: Completed translation [2023-02-14 01:33:29,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29 WrapperNode [2023-02-14 01:33:29,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 01:33:29,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 01:33:29,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 01:33:29,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 01:33:29,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,092 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2023-02-14 01:33:29,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 01:33:29,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 01:33:29,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 01:33:29,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 01:33:29,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,111 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 01:33:29,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 01:33:29,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 01:33:29,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 01:33:29,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (1/1) ... [2023-02-14 01:33:29,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:33:29,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:33:29,156 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) [2023-02-14 01:33:29,171 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 [2023-02-14 01:33:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 01:33:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 01:33:29,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 01:33:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 01:33:29,193 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-02-14 01:33:29,193 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-02-14 01:33:29,237 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 01:33:29,239 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 01:33:29,331 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 01:33:29,335 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 01:33:29,335 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 01:33:29,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:33:29 BoogieIcfgContainer [2023-02-14 01:33:29,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 01:33:29,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 01:33:29,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 01:33:29,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 01:33:29,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:33:28" (1/3) ... [2023-02-14 01:33:29,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e7d7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:33:29, skipping insertion in model container [2023-02-14 01:33:29,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:33:29" (2/3) ... [2023-02-14 01:33:29,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e7d7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:33:29, skipping insertion in model container [2023-02-14 01:33:29,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:33:29" (3/3) ... [2023-02-14 01:33:29,344 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2023-02-14 01:33:29,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 01:33:29,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 01:33:29,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 01:33:29,425 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;@52983f8f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 01:33:29,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 01:33:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2023-02-14 01:33:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 01:33:29,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:33:29,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:33:29,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:33:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:33:29,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times [2023-02-14 01:33:29,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:33:29,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753786027] [2023-02-14 01:33:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:33:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:33:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:29,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:33:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:33:29,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753786027] [2023-02-14 01:33:29,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753786027] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:33:29,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:33:29,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:33:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782564340] [2023-02-14 01:33:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:33:29,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:33:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:33:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:33:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:33:29,714 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2023-02-14 01:33:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:33:29,772 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-02-14 01:33:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:33:29,775 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 [2023-02-14 01:33:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:33:29,780 INFO L225 Difference]: With dead ends: 29 [2023-02-14 01:33:29,780 INFO L226 Difference]: Without dead ends: 16 [2023-02-14 01:33:29,782 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 [2023-02-14 01:33:29,787 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:33:29,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 60 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:33:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-14 01:33:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-14 01:33:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 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) [2023-02-14 01:33:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-02-14 01:33:29,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2023-02-14 01:33:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:33:29,817 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-02-14 01:33:29,818 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) [2023-02-14 01:33:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-02-14 01:33:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 01:33:29,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:33:29,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:33:29,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 01:33:29,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:33:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:33:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times [2023-02-14 01:33:29,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:33:29,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740942453] [2023-02-14 01:33:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:33:29,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:33:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:29,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:29,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:33:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:33:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740942453] [2023-02-14 01:33:29,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740942453] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:33:29,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:33:29,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 01:33:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574675608] [2023-02-14 01:33:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:33:29,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 01:33:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:33:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 01:33:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:33:29,990 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 01:33:30,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:33:30,007 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-02-14 01:33:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 01:33:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-02-14 01:33:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:33:30,008 INFO L225 Difference]: With dead ends: 28 [2023-02-14 01:33:30,008 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 01:33:30,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 01:33:30,012 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:33:30,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:33:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 01:33:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-02-14 01:33:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 01:33:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-02-14 01:33:30,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2023-02-14 01:33:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:33:30,026 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-02-14 01:33:30,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 01:33:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-02-14 01:33:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 01:33:30,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:33:30,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:33:30,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 01:33:30,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:33:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:33:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times [2023-02-14 01:33:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:33:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491109999] [2023-02-14 01:33:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:33:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:33:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:33:30,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:33:30,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491109999] [2023-02-14 01:33:30,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491109999] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:33:30,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216489759] [2023-02-14 01:33:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:33:30,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:33:30,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:33:30,186 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) [2023-02-14 01:33:30,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 01:33:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 01:33:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:33:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:33:30,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:33:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 01:33:30,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216489759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:33:30,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:33:30,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-02-14 01:33:30,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151420161] [2023-02-14 01:33:30,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:33:30,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 01:33:30,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:33:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 01:33:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 01:33:30,446 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 01:33:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:33:30,510 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-02-14 01:33:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 01:33:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-02-14 01:33:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:33:30,511 INFO L225 Difference]: With dead ends: 24 [2023-02-14 01:33:30,511 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 01:33:30,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 01:33:30,512 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:33:30,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 01:33:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 01:33:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-14 01:33:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 01:33:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-02-14 01:33:30,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2023-02-14 01:33:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:33:30,516 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-02-14 01:33:30,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 01:33:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-02-14 01:33:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 01:33:30,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:33:30,525 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:33:30,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 01:33:30,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:33:30,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:33:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:33:30,731 INFO L85 PathProgramCache]: Analyzing trace with hash -755943847, now seen corresponding path program 1 times [2023-02-14 01:33:30,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:33:30,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135944531] [2023-02-14 01:33:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:33:30,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:33:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:33:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:33:30,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:33:30,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135944531] [2023-02-14 01:33:30,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135944531] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:33:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733270070] [2023-02-14 01:33:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:33:30,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:33:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:33:30,920 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) [2023-02-14 01:33:30,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 01:33:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:33:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 01:33:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:33:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:33:30,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:33:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:33:31,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733270070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:33:31,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:33:31,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-02-14 01:33:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670995004] [2023-02-14 01:33:31,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:33:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 01:33:31,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:33:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 01:33:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-14 01:33:31,156 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 01:33:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:33:31,195 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-02-14 01:33:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 01:33:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) Word has length 24 [2023-02-14 01:33:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:33:31,197 INFO L225 Difference]: With dead ends: 36 [2023-02-14 01:33:31,197 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 01:33:31,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-14 01:33:31,198 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:33:31,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 01:33:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 01:33:31,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-02-14 01:33:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 01:33:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-02-14 01:33:31,208 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 24 [2023-02-14 01:33:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:33:31,208 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-02-14 01:33:31,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 01:33:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-02-14 01:33:31,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 01:33:31,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:33:31,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:33:31,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 01:33:31,420 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,SelfDestructingSolverStorable3 [2023-02-14 01:33:31,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:33:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:33:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash -727314696, now seen corresponding path program 2 times [2023-02-14 01:33:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:33:31,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563722847] [2023-02-14 01:33:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:33:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:33:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 01:33:31,436 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 01:33:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 01:33:31,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-14 01:33:31,464 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-14 01:33:31,465 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-14 01:33:31,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 01:33:31,468 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-02-14 01:33:31,470 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-14 01:33:31,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 01:33:31 BoogieIcfgContainer [2023-02-14 01:33:31,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-14 01:33:31,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-14 01:33:31,491 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-14 01:33:31,491 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-14 01:33:31,491 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:33:29" (3/4) ... [2023-02-14 01:33:31,493 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-14 01:33:31,524 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-14 01:33:31,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-14 01:33:31,525 INFO L158 Benchmark]: Toolchain (without parser) took 2602.02ms. Allocated memory was 134.2MB in the beginning and 186.6MB in the end (delta: 52.4MB). Free memory was 97.6MB in the beginning and 123.1MB in the end (delta: -25.5MB). Peak memory consumption was 28.2MB. Max. memory is 16.1GB. [2023-02-14 01:33:31,525 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 01:33:31,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 147.44ms. Allocated memory is still 134.2MB. Free memory was 97.6MB in the beginning and 87.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 01:33:31,527 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.72ms. Allocated memory is still 134.2MB. Free memory was 87.4MB in the beginning and 86.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 01:33:31,527 INFO L158 Benchmark]: Boogie Preprocessor took 22.00ms. Allocated memory is still 134.2MB. Free memory was 85.9MB in the beginning and 85.1MB in the end (delta: 863.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 01:33:31,527 INFO L158 Benchmark]: RCFGBuilder took 219.87ms. Allocated memory is still 134.2MB. Free memory was 85.1MB in the beginning and 75.9MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-14 01:33:31,528 INFO L158 Benchmark]: TraceAbstraction took 2152.75ms. Allocated memory was 134.2MB in the beginning and 186.6MB in the end (delta: 52.4MB). Free memory was 75.0MB in the beginning and 125.2MB in the end (delta: -50.2MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. [2023-02-14 01:33:31,528 INFO L158 Benchmark]: Witness Printer took 33.36ms. Allocated memory is still 186.6MB. Free memory was 125.2MB in the beginning and 123.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 01:33:31,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 147.44ms. Allocated memory is still 134.2MB. Free memory was 97.6MB in the beginning and 87.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.72ms. Allocated memory is still 134.2MB. Free memory was 87.4MB in the beginning and 86.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.00ms. Allocated memory is still 134.2MB. Free memory was 85.9MB in the beginning and 85.1MB in the end (delta: 863.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 219.87ms. Allocated memory is still 134.2MB. Free memory was 85.1MB in the beginning and 75.9MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2152.75ms. Allocated memory was 134.2MB in the beginning and 186.6MB in the end (delta: 52.4MB). Free memory was 75.0MB in the beginning and 125.2MB in the end (delta: -50.2MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. * Witness Printer took 33.36ms. Allocated memory is still 186.6MB. Free memory was 125.2MB in the beginning and 123.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id((unsigned int)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((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L15] RET, EXPR id(input) VAL [id(input)=2, input=2] [L15] int result = id(input); [L16] COND TRUE result == 2 VAL [input=2, result=2] [L17] reach_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17 mSDsluCounter, 297 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 233 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 95 IncrementalHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 64 mSDtfsCounter, 95 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 259 SizeOfPredicates, 2 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 43/61 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! [2023-02-14 01:33:31,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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