./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_b5_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_b5_o10-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec6cabd8118457b9c0b0fa0634e1000a9ed6e94f430780d1729f9bc16e854f85 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:08:22,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:08:22,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:08:22,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:08:22,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:08:22,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:08:22,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:08:22,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:08:22,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:08:22,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:08:22,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:08:22,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:08:22,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:08:22,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:08:22,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:08:22,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:08:22,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:08:22,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:08:22,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:08:22,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:08:22,965 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:08:22,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:08:22,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:08:22,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:08:22,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:08:22,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:08:22,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:08:22,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:08:22,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:08:22,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:08:22,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:08:22,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:08:22,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:08:22,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:08:22,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:08:22,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:08:22,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:08:22,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:08:22,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:08:22,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:08:22,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:08:22,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:08:22,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:08:23,011 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:08:23,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:08:23,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:08:23,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:08:23,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:08:23,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:08:23,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:08:23,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:08:23,014 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:08:23,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:08:23,015 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:08:23,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:08:23,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:08:23,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:08:23,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:08:23,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:08:23,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:08:23,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:08:23,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:08:23,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:08:23,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:08:23,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:08:23,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:08:23,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:08:23,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:08:23,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:08:23,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:08:23,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:08:23,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:08:23,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:08:23,022 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:08:23,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:08:23,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:08:23,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec6cabd8118457b9c0b0fa0634e1000a9ed6e94f430780d1729f9bc16e854f85 [2022-07-21 05:08:23,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:08:23,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:08:23,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:08:23,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:08:23,299 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:08:23,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b5_o10-2.c [2022-07-21 05:08:23,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1237ef925/34591c3ddfb746848133aa11f947ad7b/FLAG938926db5 [2022-07-21 05:08:23,682 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:08:23,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b5_o10-2.c [2022-07-21 05:08:23,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1237ef925/34591c3ddfb746848133aa11f947ad7b/FLAG938926db5 [2022-07-21 05:08:24,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1237ef925/34591c3ddfb746848133aa11f947ad7b [2022-07-21 05:08:24,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:08:24,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:08:24,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:08:24,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:08:24,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:08:24,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c68cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24, skipping insertion in model container [2022-07-21 05:08:24,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:08:24,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:08:24,266 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/id_b5_o10-2.c[530,543] [2022-07-21 05:08:24,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:08:24,272 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:08:24,280 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/id_b5_o10-2.c[530,543] [2022-07-21 05:08:24,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:08:24,288 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:08:24,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24 WrapperNode [2022-07-21 05:08:24,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:08:24,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:08:24,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:08:24,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:08:24,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,342 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-07-21 05:08:24,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:08:24,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:08:24,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:08:24,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:08:24,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:08:24,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:08:24,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:08:24,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:08:24,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (1/1) ... [2022-07-21 05:08:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:08:24,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:24,383 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) [2022-07-21 05:08:24,399 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 [2022-07-21 05:08:24,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:08:24,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:08:24,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:08:24,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:08:24,410 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-07-21 05:08:24,410 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-07-21 05:08:24,468 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:08:24,469 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:08:24,570 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:08:24,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:08:24,576 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 05:08:24,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:08:24 BoogieIcfgContainer [2022-07-21 05:08:24,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:08:24,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:08:24,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:08:24,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:08:24,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:08:24" (1/3) ... [2022-07-21 05:08:24,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b15980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:08:24, skipping insertion in model container [2022-07-21 05:08:24,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:24" (2/3) ... [2022-07-21 05:08:24,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b15980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:08:24, skipping insertion in model container [2022-07-21 05:08:24,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:08:24" (3/3) ... [2022-07-21 05:08:24,583 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2022-07-21 05:08:24,592 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:08:24,592 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:08:24,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:08:24,644 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@b952fcc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f91aa39 [2022-07-21 05:08:24,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:08:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 05:08:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 05:08:24,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:24,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:24,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:24,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times [2022-07-21 05:08:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:24,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457668437] [2022-07-21 05:08:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:24,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:24,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:08:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:24,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457668437] [2022-07-21 05:08:24,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457668437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:08:24,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:08:24,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:08:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930531376] [2022-07-21 05:08:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:08:24,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:08:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:08:24,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:08:24,921 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 05:08:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:24,970 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-07-21 05:08:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:08:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-21 05:08:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:24,978 INFO L225 Difference]: With dead ends: 29 [2022-07-21 05:08:24,978 INFO L226 Difference]: Without dead ends: 16 [2022-07-21 05:08:24,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:08:24,986 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:24,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 60 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-21 05:08:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-21 05:08:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 05:08:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-21 05:08:25,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2022-07-21 05:08:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:25,018 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-21 05:08:25,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 05:08:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-21 05:08:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 05:08:25,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:25,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:25,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:08:25,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times [2022-07-21 05:08:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741437041] [2022-07-21 05:08:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:25,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:25,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:08:25,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741437041] [2022-07-21 05:08:25,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741437041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:08:25,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:08:25,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:08:25,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486531552] [2022-07-21 05:08:25,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:08:25,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:08:25,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:25,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:08:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:08:25,137 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 05:08:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:25,149 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-07-21 05:08:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:08:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-21 05:08:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:25,150 INFO L225 Difference]: With dead ends: 28 [2022-07-21 05:08:25,150 INFO L226 Difference]: Without dead ends: 20 [2022-07-21 05:08:25,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:08:25,151 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:25,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-21 05:08:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-07-21 05:08:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 05:08:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-21 05:08:25,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2022-07-21 05:08:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:25,156 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-21 05:08:25,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 05:08:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-21 05:08:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 05:08:25,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:25,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:25,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:08:25,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:25,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:25,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times [2022-07-21 05:08:25,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:25,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152389789] [2022-07-21 05:08:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:25,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:25,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:25,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:08:25,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:25,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152389789] [2022-07-21 05:08:25,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152389789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410875996] [2022-07-21 05:08:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:25,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:25,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:25,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:08:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 05:08:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:08:25,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:08:25,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410875996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:25,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:25,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-21 05:08:25,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720530848] [2022-07-21 05:08:25,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:25,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 05:08:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 05:08:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-07-21 05:08:25,437 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 05:08:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:25,481 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-07-21 05:08:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 05:08:25,482 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 17 [2022-07-21 05:08:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:25,482 INFO L225 Difference]: With dead ends: 22 [2022-07-21 05:08:25,482 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 05:08:25,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-07-21 05:08:25,484 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:25,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 05:08:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 05:08:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:08:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 05:08:25,485 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-07-21 05:08:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:25,486 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 05:08:25,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 05:08:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 05:08:25,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 05:08:25,488 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 05:08:25,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:25,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 05:08:25,726 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 05:08:25,727 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 05:08:25,727 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 05:08:25,727 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 05:08:25,727 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-07-21 05:08:25,727 INFO L899 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2022-07-21 05:08:25,728 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2022-07-21 05:08:25,728 INFO L902 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: true [2022-07-21 05:08:25,728 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-07-21 05:08:25,728 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 19) no Hoare annotation was computed. [2022-07-21 05:08:25,728 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2022-07-21 05:08:25,728 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2022-07-21 05:08:25,728 INFO L899 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-07-21 05:08:25,729 INFO L902 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: true [2022-07-21 05:08:25,729 INFO L902 garLoopResultBuilder]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2022-07-21 05:08:25,729 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-07-21 05:08:25,729 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2022-07-21 05:08:25,731 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 05:08:25,749 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 05:08:25,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:08:25 BoogieIcfgContainer [2022-07-21 05:08:25,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 05:08:25,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 05:08:25,753 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 05:08:25,753 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 05:08:25,754 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:08:24" (3/4) ... [2022-07-21 05:08:25,756 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 05:08:25,762 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2022-07-21 05:08:25,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-21 05:08:25,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-21 05:08:25,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 05:08:25,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 05:08:25,784 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 05:08:25,785 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 05:08:25,785 INFO L158 Benchmark]: Toolchain (without parser) took 1657.93ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 39.5MB in the beginning and 46.3MB in the end (delta: -6.8MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2022-07-21 05:08:25,785 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 05:08:25,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.70ms. Allocated memory is still 60.8MB. Free memory was 39.4MB in the beginning and 30.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 05:08:25,786 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.37ms. Allocated memory is still 60.8MB. Free memory was 30.0MB in the beginning and 44.2MB in the end (delta: -14.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 05:08:25,786 INFO L158 Benchmark]: Boogie Preprocessor took 15.76ms. Allocated memory is still 60.8MB. Free memory was 44.2MB in the beginning and 43.3MB in the end (delta: 899.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 05:08:25,787 INFO L158 Benchmark]: RCFGBuilder took 217.97ms. Allocated memory is still 60.8MB. Free memory was 43.3MB in the beginning and 34.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 05:08:25,787 INFO L158 Benchmark]: TraceAbstraction took 1173.27ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 34.0MB in the beginning and 49.0MB in the end (delta: -15.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 05:08:25,787 INFO L158 Benchmark]: Witness Printer took 32.11ms. Allocated memory is still 73.4MB. Free memory was 49.0MB in the beginning and 46.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 05:08:25,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 42.5MB in the beginning and 42.4MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.70ms. Allocated memory is still 60.8MB. Free memory was 39.4MB in the beginning and 30.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.37ms. Allocated memory is still 60.8MB. Free memory was 30.0MB in the beginning and 44.2MB in the end (delta: -14.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.76ms. Allocated memory is still 60.8MB. Free memory was 44.2MB in the beginning and 43.3MB in the end (delta: 899.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 217.97ms. Allocated memory is still 60.8MB. Free memory was 43.3MB in the beginning and 34.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1173.27ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 34.0MB in the beginning and 49.0MB in the end (delta: -15.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 32.11ms. Allocated memory is still 73.4MB. Free memory was 49.0MB in the beginning and 46.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 198 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 153 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68 IncrementalHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 45 mSDtfsCounter, 68 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 138 SizeOfPredicates, 1 NumberOfNonLiveVariables, 64 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 10/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-21 05:08:25,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE