./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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/afterrec_2calls-1.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 8cf5a35873afe0e5012214bd680ff6c9f10002775e1599934b6c286bf71e0e3d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 18:14:06,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 18:14:06,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 18:14:06,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 18:14:06,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 18:14:06,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 18:14:06,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 18:14:07,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 18:14:07,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 18:14:07,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 18:14:07,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 18:14:07,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 18:14:07,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 18:14:07,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 18:14:07,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 18:14:07,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 18:14:07,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 18:14:07,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 18:14:07,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 18:14:07,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 18:14:07,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 18:14:07,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 18:14:07,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 18:14:07,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 18:14:07,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 18:14:07,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 18:14:07,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 18:14:07,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 18:14:07,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 18:14:07,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 18:14:07,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 18:14:07,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 18:14:07,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 18:14:07,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 18:14:07,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 18:14:07,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 18:14:07,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 18:14:07,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 18:14:07,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 18:14:07,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 18:14:07,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 18:14:07,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 18:14:07,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 18:14:07,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 18:14:07,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 18:14:07,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 18:14:07,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 18:14:07,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 18:14:07,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 18:14:07,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 18:14:07,097 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 18:14:07,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 18:14:07,098 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 18:14:07,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 18:14:07,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 18:14:07,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 18:14:07,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 18:14:07,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 18:14:07,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 18:14:07,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 18:14:07,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 18:14:07,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 18:14:07,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 18:14:07,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 18:14:07,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 18:14:07,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 18:14:07,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 18:14:07,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 18:14:07,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 18:14:07,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 18:14:07,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 18:14:07,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 18:14:07,102 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 18:14:07,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 18:14:07,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 18:14:07,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cf5a35873afe0e5012214bd680ff6c9f10002775e1599934b6c286bf71e0e3d [2022-02-20 18:14:07,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 18:14:07,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 18:14:07,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 18:14:07,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 18:14:07,431 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 18:14:07,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2022-02-20 18:14:07,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d10c68d/43f96492651f4d2db1a3bfb05caa27d9/FLAG64f66526c [2022-02-20 18:14:07,941 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 18:14:07,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2022-02-20 18:14:07,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d10c68d/43f96492651f4d2db1a3bfb05caa27d9/FLAG64f66526c [2022-02-20 18:14:08,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d10c68d/43f96492651f4d2db1a3bfb05caa27d9 [2022-02-20 18:14:08,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 18:14:08,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 18:14:08,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 18:14:08,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 18:14:08,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 18:14:08,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a9992a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08, skipping insertion in model container [2022-02-20 18:14:08,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 18:14:08,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 18:14:08,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[354,367] [2022-02-20 18:14:08,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[442,455] [2022-02-20 18:14:08,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 18:14:08,599 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 18:14:08,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[354,367] [2022-02-20 18:14:08,618 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[442,455] [2022-02-20 18:14:08,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 18:14:08,632 INFO L208 MainTranslator]: Completed translation [2022-02-20 18:14:08,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08 WrapperNode [2022-02-20 18:14:08,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 18:14:08,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 18:14:08,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 18:14:08,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 18:14:08,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,663 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2022-02-20 18:14:08,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 18:14:08,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 18:14:08,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 18:14:08,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 18:14:08,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 18:14:08,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 18:14:08,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 18:14:08,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 18:14:08,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (1/1) ... [2022-02-20 18:14:08,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 18:14:08,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 18:14:08,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-20 18:14:08,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-20 18:14:08,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 18:14:08,816 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-20 18:14:08,816 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-20 18:14:08,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 18:14:08,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 18:14:08,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-20 18:14:08,817 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2022-02-20 18:14:08,817 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2022-02-20 18:14:08,865 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 18:14:08,867 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 18:14:08,968 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 18:14:08,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 18:14:08,976 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-20 18:14:08,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 06:14:08 BoogieIcfgContainer [2022-02-20 18:14:08,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 18:14:08,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 18:14:08,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 18:14:08,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 18:14:08,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 06:14:08" (1/3) ... [2022-02-20 18:14:08,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b798df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 06:14:08, skipping insertion in model container [2022-02-20 18:14:08,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:08" (2/3) ... [2022-02-20 18:14:08,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b798df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 06:14:08, skipping insertion in model container [2022-02-20 18:14:08,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 06:14:08" (3/3) ... [2022-02-20 18:14:08,986 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2022-02-20 18:14:08,991 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 18:14:08,991 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 18:14:09,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 18:14:09,039 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-20 18:14:09,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-20 18:14:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-20 18:14:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 18:14:09,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 18:14:09,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 18:14:09,064 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 18:14:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 18:14:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash 444027717, now seen corresponding path program 1 times [2022-02-20 18:14:09,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 18:14:09,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316359168] [2022-02-20 18:14:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 18:14:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 18:14:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 18:14:09,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-20 18:14:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 18:14:09,320 INFO L290 TraceCheckUtils]: 0: Hoare triple {23#true} ~n := #in~n; {32#(= f2_~n |f2_#in~n|)} is VALID [2022-02-20 18:14:09,322 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#(= f2_~n |f2_#in~n|)} assume ~n < 3; {33#(<= |f2_#in~n| 2)} is VALID [2022-02-20 18:14:09,322 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#(<= |f2_#in~n| 2)} assume true; {33#(<= |f2_#in~n| 2)} is VALID [2022-02-20 18:14:09,324 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#(<= |f2_#in~n| 2)} {27#(<= 3 f_~n)} #28#return; {24#false} is VALID [2022-02-20 18:14:09,325 INFO L290 TraceCheckUtils]: 0: Hoare triple {23#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {23#true} is VALID [2022-02-20 18:14:09,325 INFO L290 TraceCheckUtils]: 1: Hoare triple {23#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1; {23#true} is VALID [2022-02-20 18:14:09,327 INFO L272 TraceCheckUtils]: 2: Hoare triple {23#true} call f(4); {25#(<= 4 |f_#in~n|)} is VALID [2022-02-20 18:14:09,327 INFO L290 TraceCheckUtils]: 3: Hoare triple {25#(<= 4 |f_#in~n|)} ~n := #in~n; {26#(<= 4 f_~n)} is VALID [2022-02-20 18:14:09,328 INFO L290 TraceCheckUtils]: 4: Hoare triple {26#(<= 4 f_~n)} assume !(~n < 3);#t~post6 := ~n;~n := #t~post6 - 1;havoc #t~post6; {27#(<= 3 f_~n)} is VALID [2022-02-20 18:14:09,329 INFO L272 TraceCheckUtils]: 5: Hoare triple {27#(<= 3 f_~n)} call f2(~n); {23#true} is VALID [2022-02-20 18:14:09,329 INFO L290 TraceCheckUtils]: 6: Hoare triple {23#true} ~n := #in~n; {32#(= f2_~n |f2_#in~n|)} is VALID [2022-02-20 18:14:09,330 INFO L290 TraceCheckUtils]: 7: Hoare triple {32#(= f2_~n |f2_#in~n|)} assume ~n < 3; {33#(<= |f2_#in~n| 2)} is VALID [2022-02-20 18:14:09,331 INFO L290 TraceCheckUtils]: 8: Hoare triple {33#(<= |f2_#in~n| 2)} assume true; {33#(<= |f2_#in~n| 2)} is VALID [2022-02-20 18:14:09,332 INFO L284 TraceCheckUtils]: 9: Hoare quadruple {33#(<= |f2_#in~n| 2)} {27#(<= 3 f_~n)} #28#return; {24#false} is VALID [2022-02-20 18:14:09,332 INFO L290 TraceCheckUtils]: 10: Hoare triple {24#false} assume !false; {24#false} is VALID [2022-02-20 18:14:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 18:14:09,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 18:14:09,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316359168] [2022-02-20 18:14:09,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316359168] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 18:14:09,335 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 18:14:09,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-20 18:14:09,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427452067] [2022-02-20 18:14:09,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 18:14:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-20 18:14:09,344 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 18:14:09,347 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:09,362 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 18:14:09,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-20 18:14:09,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 18:14:09,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-20 18:14:09,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-20 18:14:09,387 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 18:14:09,580 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-02-20 18:14:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-20 18:14:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-20 18:14:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 18:14:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 36 transitions. [2022-02-20 18:14:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 36 transitions. [2022-02-20 18:14:09,606 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 36 transitions. [2022-02-20 18:14:09,652 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 18:14:09,663 INFO L225 Difference]: With dead ends: 31 [2022-02-20 18:14:09,664 INFO L226 Difference]: Without dead ends: 20 [2022-02-20 18:14:09,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-20 18:14:09,675 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 18:14:09,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 18:14:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-20 18:14:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-20 18:14:09,715 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 18:14:09,716 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:09,717 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:09,717 INFO L87 Difference]: Start difference. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 18:14:09,722 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-20 18:14:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-20 18:14:09,724 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 18:14:09,724 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 18:14:09,725 INFO L74 IsIncluded]: Start isIncluded. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 20 states. [2022-02-20 18:14:09,725 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 20 states. [2022-02-20 18:14:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 18:14:09,729 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-20 18:14:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-20 18:14:09,730 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 18:14:09,730 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 18:14:09,730 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 18:14:09,730 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 18:14:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-02-20 18:14:09,735 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2022-02-20 18:14:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 18:14:09,738 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-02-20 18:14:09,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-20 18:14:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-20 18:14:09,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 18:14:09,742 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 18:14:09,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 18:14:09,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 18:14:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 18:14:09,755 INFO L85 PathProgramCache]: Analyzing trace with hash 535126816, now seen corresponding path program 1 times [2022-02-20 18:14:09,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 18:14:09,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778047859] [2022-02-20 18:14:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 18:14:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 18:14:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 18:14:09,786 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-20 18:14:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 18:14:09,836 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-20 18:14:09,837 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-20 18:14:09,839 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-02-20 18:14:09,841 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-02-20 18:14:09,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-20 18:14:09,846 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-20 18:14:09,852 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-20 18:14:09,865 FATAL L489 DefaultTranslator]: Callstack has procedure call flag but succeeding procedure is empty at [CALL] call f(4); [2022-02-20 18:14:09,866 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: callstack broken after backtranslation by InlinerBacktranslator at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:607) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-02-20 18:14:09,878 INFO L158 Benchmark]: Toolchain (without parser) took 1523.46ms. Allocated memory is still 144.7MB. Free memory was 105.0MB in the beginning and 64.2MB in the end (delta: 40.8MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. [2022-02-20 18:14:09,878 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 144.7MB. Free memory is still 121.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 18:14:09,879 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.43ms. Allocated memory is still 144.7MB. Free memory was 104.6MB in the beginning and 117.3MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-20 18:14:09,880 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.70ms. Allocated memory is still 144.7MB. Free memory was 117.3MB in the beginning and 115.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 18:14:09,880 INFO L158 Benchmark]: Boogie Preprocessor took 20.65ms. Allocated memory is still 144.7MB. Free memory was 115.7MB in the beginning and 115.2MB in the end (delta: 478.3kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-02-20 18:14:09,881 INFO L158 Benchmark]: RCFGBuilder took 291.55ms. Allocated memory is still 144.7MB. Free memory was 114.5MB in the beginning and 105.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-20 18:14:09,883 INFO L158 Benchmark]: TraceAbstraction took 893.37ms. Allocated memory is still 144.7MB. Free memory was 104.8MB in the beginning and 64.2MB in the end (delta: 40.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2022-02-20 18:14:09,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 144.7MB. Free memory is still 121.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.43ms. Allocated memory is still 144.7MB. Free memory was 104.6MB in the beginning and 117.3MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.70ms. Allocated memory is still 144.7MB. Free memory was 117.3MB in the beginning and 115.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.65ms. Allocated memory is still 144.7MB. Free memory was 115.7MB in the beginning and 115.2MB in the end (delta: 478.3kB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 291.55ms. Allocated memory is still 144.7MB. Free memory was 114.5MB in the beginning and 105.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 893.37ms. Allocated memory is still 144.7MB. Free memory was 104.8MB in the beginning and 64.2MB in the end (delta: 40.6MB). Peak memory consumption was 41.9MB. 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 - ExceptionOrErrorResult: AssertionError: callstack broken after backtranslation by InlinerBacktranslator de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: callstack broken after backtranslation by InlinerBacktranslator: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-20 18:14:09,924 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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/afterrec_2calls-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 8cf5a35873afe0e5012214bd680ff6c9f10002775e1599934b6c286bf71e0e3d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 18:14:12,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 18:14:12,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 18:14:12,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 18:14:12,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 18:14:12,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 18:14:12,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 18:14:12,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 18:14:12,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 18:14:13,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 18:14:13,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 18:14:13,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 18:14:13,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 18:14:13,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 18:14:13,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 18:14:13,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 18:14:13,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 18:14:13,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 18:14:13,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 18:14:13,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 18:14:13,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 18:14:13,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 18:14:13,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 18:14:13,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 18:14:13,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 18:14:13,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 18:14:13,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 18:14:13,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 18:14:13,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 18:14:13,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 18:14:13,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 18:14:13,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 18:14:13,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 18:14:13,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 18:14:13,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 18:14:13,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 18:14:13,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 18:14:13,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 18:14:13,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 18:14:13,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 18:14:13,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 18:14:13,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-02-20 18:14:13,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 18:14:13,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 18:14:13,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 18:14:13,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 18:14:13,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 18:14:13,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 18:14:13,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 18:14:13,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 18:14:13,094 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 18:14:13,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 18:14:13,096 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 18:14:13,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 18:14:13,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 18:14:13,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 18:14:13,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 18:14:13,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 18:14:13,097 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-02-20 18:14:13,097 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-02-20 18:14:13,097 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-02-20 18:14:13,097 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 18:14:13,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 18:14:13,098 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 18:14:13,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 18:14:13,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 18:14:13,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 18:14:13,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 18:14:13,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 18:14:13,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 18:14:13,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 18:14:13,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 18:14:13,100 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-02-20 18:14:13,100 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-02-20 18:14:13,100 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 18:14:13,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 18:14:13,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 18:14:13,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-20 18:14:13,101 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cf5a35873afe0e5012214bd680ff6c9f10002775e1599934b6c286bf71e0e3d [2022-02-20 18:14:13,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 18:14:13,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 18:14:13,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 18:14:13,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 18:14:13,497 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 18:14:13,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2022-02-20 18:14:13,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d298644/a08a2b88fedc498697e8bc56ba81163c/FLAG32b4e0289 [2022-02-20 18:14:14,098 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 18:14:14,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2022-02-20 18:14:14,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d298644/a08a2b88fedc498697e8bc56ba81163c/FLAG32b4e0289 [2022-02-20 18:14:14,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d298644/a08a2b88fedc498697e8bc56ba81163c [2022-02-20 18:14:14,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 18:14:14,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 18:14:14,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 18:14:14,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 18:14:14,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 18:14:14,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118713ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14, skipping insertion in model container [2022-02-20 18:14:14,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 18:14:14,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 18:14:14,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[354,367] [2022-02-20 18:14:14,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[442,455] [2022-02-20 18:14:14,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 18:14:14,762 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 18:14:14,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[354,367] [2022-02-20 18:14:14,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c[442,455] [2022-02-20 18:14:14,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 18:14:14,845 INFO L208 MainTranslator]: Completed translation [2022-02-20 18:14:14,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14 WrapperNode [2022-02-20 18:14:14,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 18:14:14,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 18:14:14,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 18:14:14,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 18:14:14,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,876 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2022-02-20 18:14:14,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 18:14:14,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 18:14:14,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 18:14:14,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 18:14:14,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 18:14:14,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 18:14:14,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 18:14:14,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 18:14:14,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (1/1) ... [2022-02-20 18:14:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 18:14:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 18:14:14,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-20 18:14:14,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-20 18:14:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 18:14:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-20 18:14:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-20 18:14:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 18:14:14,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 18:14:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-02-20 18:14:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2022-02-20 18:14:14,963 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2022-02-20 18:14:15,017 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 18:14:15,018 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 18:14:15,197 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 18:14:15,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 18:14:15,204 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-20 18:14:15,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 06:14:15 BoogieIcfgContainer [2022-02-20 18:14:15,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 18:14:15,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 18:14:15,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 18:14:15,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 18:14:15,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 06:14:14" (1/3) ... [2022-02-20 18:14:15,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acd45d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 06:14:15, skipping insertion in model container [2022-02-20 18:14:15,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 06:14:14" (2/3) ... [2022-02-20 18:14:15,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acd45d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 06:14:15, skipping insertion in model container [2022-02-20 18:14:15,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 06:14:15" (3/3) ... [2022-02-20 18:14:15,213 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2022-02-20 18:14:15,231 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 18:14:15,232 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 18:14:15,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 18:14:15,293 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-20 18:14:15,293 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-20 18:14:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-20 18:14:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 18:14:15,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 18:14:15,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 18:14:15,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 18:14:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 18:14:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash 444027717, now seen corresponding path program 1 times [2022-02-20 18:14:15,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 18:14:15,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102437238] [2022-02-20 18:14:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 18:14:15,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 18:14:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 18:14:15,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-02-20 18:14:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-02-20 18:14:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 18:14:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-20 18:14:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 18:14:15,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 18:14:15,566 INFO L290 TraceCheckUtils]: 0: Hoare triple {23#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0bv32, 0bv32;assume 0bv1 == #valid[0bv32];assume ~bvult32(0bv32, #StackHeapBarrier);call #Ultimate.allocInit(2bv32, 1bv32);call write~init~intINTTYPE1(48bv8, 1bv32, 0bv32, 1bv32);call write~init~intINTTYPE1(0bv8, 1bv32, 1bv32, 1bv32);call #Ultimate.allocInit(20bv32, 2bv32);call #Ultimate.allocInit(12bv32, 3bv32); {23#true} is VALID [2022-02-20 18:14:15,567 INFO L290 TraceCheckUtils]: 1: Hoare triple {23#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1; {23#true} is VALID [2022-02-20 18:14:15,568 INFO L272 TraceCheckUtils]: 2: Hoare triple {23#true} call f(4bv32); {34#(= (_ bv4 32) |f_#in~n|)} is VALID [2022-02-20 18:14:15,569 INFO L290 TraceCheckUtils]: 3: Hoare triple {34#(= (_ bv4 32) |f_#in~n|)} ~n := #in~n; {38#(= (_ bv4 32) f_~n)} is VALID [2022-02-20 18:14:15,570 INFO L290 TraceCheckUtils]: 4: Hoare triple {38#(= (_ bv4 32) f_~n)} assume !~bvslt32(~n, 3bv32);#t~post6 := ~n;~n := ~bvsub32(#t~post6, 1bv32);havoc #t~post6; {42#(= (_ bv4 32) (bvadd f_~n (_ bv1 32)))} is VALID [2022-02-20 18:14:15,570 INFO L272 TraceCheckUtils]: 5: Hoare triple {42#(= (_ bv4 32) (bvadd f_~n (_ bv1 32)))} call f2(~n); {23#true} is VALID [2022-02-20 18:14:15,571 INFO L290 TraceCheckUtils]: 6: Hoare triple {23#true} ~n := #in~n; {49#(= f2_~n |f2_#in~n|)} is VALID [2022-02-20 18:14:15,572 INFO L290 TraceCheckUtils]: 7: Hoare triple {49#(= f2_~n |f2_#in~n|)} assume ~bvslt32(~n, 3bv32); {53#(bvslt |f2_#in~n| (_ bv3 32))} is VALID [2022-02-20 18:14:15,572 INFO L290 TraceCheckUtils]: 8: Hoare triple {53#(bvslt |f2_#in~n| (_ bv3 32))} assume true; {53#(bvslt |f2_#in~n| (_ bv3 32))} is VALID [2022-02-20 18:14:15,573 INFO L284 TraceCheckUtils]: 9: Hoare quadruple {53#(bvslt |f2_#in~n| (_ bv3 32))} {42#(= (_ bv4 32) (bvadd f_~n (_ bv1 32)))} #28#return; {24#false} is VALID [2022-02-20 18:14:15,573 INFO L290 TraceCheckUtils]: 10: Hoare triple {24#false} assume !false; {24#false} is VALID [2022-02-20 18:14:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 18:14:15,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 18:14:15,575 INFO L144 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-02-20 18:14:15,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102437238] [2022-02-20 18:14:15,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102437238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 18:14:15,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 18:14:15,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-20 18:14:15,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898159902] [2022-02-20 18:14:15,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 18:14:15,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-20 18:14:15,595 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 18:14:15,598 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:15,613 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 18:14:15,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-20 18:14:15,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-02-20 18:14:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-20 18:14:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-20 18:14:15,657 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 18:14:15,916 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-02-20 18:14:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-20 18:14:15,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-20 18:14:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 18:14:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 36 transitions. [2022-02-20 18:14:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 36 transitions. [2022-02-20 18:14:15,928 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 36 transitions. [2022-02-20 18:14:15,963 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 18:14:15,971 INFO L225 Difference]: With dead ends: 31 [2022-02-20 18:14:15,972 INFO L226 Difference]: Without dead ends: 20 [2022-02-20 18:14:15,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-20 18:14:15,978 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-20 18:14:15,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 63 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-20 18:14:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-20 18:14:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-20 18:14:16,005 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 18:14:16,006 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:16,006 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:16,018 INFO L87 Difference]: Start difference. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 18:14:16,021 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-20 18:14:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-20 18:14:16,022 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 18:14:16,022 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 18:14:16,023 INFO L74 IsIncluded]: Start isIncluded. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 20 states. [2022-02-20 18:14:16,023 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 20 states. [2022-02-20 18:14:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 18:14:16,026 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-02-20 18:14:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-20 18:14:16,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 18:14:16,027 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 18:14:16,027 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 18:14:16,027 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 18:14:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 18:14:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-02-20 18:14:16,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2022-02-20 18:14:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 18:14:16,031 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-02-20 18:14:16,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-20 18:14:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-20 18:14:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-20 18:14:16,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 18:14:16,033 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 18:14:16,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-02-20 18:14:16,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-02-20 18:14:16,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 18:14:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 18:14:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash 535126816, now seen corresponding path program 1 times [2022-02-20 18:14:16,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 18:14:16,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968451691] [2022-02-20 18:14:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 18:14:16,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 18:14:16,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 18:14:16,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-02-20 18:14:16,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-02-20 18:14:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 18:14:16,297 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-20 18:14:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 18:14:16,321 INFO L138 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-02-20 18:14:16,322 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-20 18:14:16,324 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-02-20 18:14:16,325 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-02-20 18:14:16,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-02-20 18:14:16,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-02-20 18:14:16,538 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-20 18:14:16,542 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-20 18:14:16,551 FATAL L489 DefaultTranslator]: Callstack has procedure call flag but succeeding procedure is empty at [CALL] call f(4bv32); [2022-02-20 18:14:16,552 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: callstack broken after backtranslation by InlinerBacktranslator at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:607) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-02-20 18:14:16,556 INFO L158 Benchmark]: Toolchain (without parser) took 1961.74ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 43.4MB in the beginning and 48.9MB in the end (delta: -5.5MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2022-02-20 18:14:16,556 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 44.0MB. Free memory was 26.4MB in the beginning and 26.4MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 18:14:16,557 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.27ms. Allocated memory is still 58.7MB. Free memory was 43.2MB in the beginning and 42.2MB in the end (delta: 1.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-02-20 18:14:16,557 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.68ms. Allocated memory is still 58.7MB. Free memory was 42.0MB in the beginning and 40.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 18:14:16,558 INFO L158 Benchmark]: Boogie Preprocessor took 18.29ms. Allocated memory is still 58.7MB. Free memory was 40.6MB in the beginning and 39.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 18:14:16,558 INFO L158 Benchmark]: RCFGBuilder took 309.51ms. Allocated memory is still 58.7MB. Free memory was 39.6MB in the beginning and 30.3MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-02-20 18:14:16,559 INFO L158 Benchmark]: TraceAbstraction took 1347.21ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 29.9MB in the beginning and 48.9MB in the end (delta: -19.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 18:14:16,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 44.0MB. Free memory was 26.4MB in the beginning and 26.4MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.27ms. Allocated memory is still 58.7MB. Free memory was 43.2MB in the beginning and 42.2MB in the end (delta: 1.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.68ms. Allocated memory is still 58.7MB. Free memory was 42.0MB in the beginning and 40.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.29ms. Allocated memory is still 58.7MB. Free memory was 40.6MB in the beginning and 39.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 309.51ms. Allocated memory is still 58.7MB. Free memory was 39.6MB in the beginning and 30.3MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1347.21ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 29.9MB in the beginning and 48.9MB in the end (delta: -19.0MB). There was no memory consumed. 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 - ExceptionOrErrorResult: AssertionError: callstack broken after backtranslation by InlinerBacktranslator de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: callstack broken after backtranslation by InlinerBacktranslator: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-20 18:14:16,600 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 Result: ERROR: ExceptionOrErrorResult: AssertionError: callstack broken after backtranslation by InlinerBacktranslator