./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test17.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/ldv-regression/test17.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 9b74b62078fe6e68ee0466b9d1c2e79e430fb1451ec86e0edd3b64031dbdbc98 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:03:29,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:03:29,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:03:29,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:03:29,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:03:29,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:03:29,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:03:29,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:03:29,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:03:29,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:03:29,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:03:29,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:03:29,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:03:29,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:03:29,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:03:29,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:03:29,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:03:29,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:03:29,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:03:29,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:03:29,403 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:03:29,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:03:29,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:03:29,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:03:29,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:03:29,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:03:29,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:03:29,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:03:29,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:03:29,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:03:29,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:03:29,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:03:29,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:03:29,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:03:29,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:03:29,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:03:29,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:03:29,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:03:29,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:03:29,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:03:29,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:03:29,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:03:29,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:03:29,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:03:29,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:03:29,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:03:29,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:03:29,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:03:29,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:03:29,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:03:29,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:03:29,461 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:03:29,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:03:29,463 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:03:29,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:03:29,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:03:29,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:03:29,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:03:29,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:03:29,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:03:29,464 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:03:29,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:03:29,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:03:29,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:03:29,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:03:29,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:03:29,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:03:29,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:03:29,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:03:29,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:03:29,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:03:29,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:03:29,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:03:29,467 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:03:29,467 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:03:29,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:03:29,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b74b62078fe6e68ee0466b9d1c2e79e430fb1451ec86e0edd3b64031dbdbc98 [2022-07-21 02:03:29,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:03:29,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:03:29,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:03:29,825 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:03:29,825 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:03:29,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test17.c [2022-07-21 02:03:29,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368315fc2/2f2361d517954782be93cec3b488682b/FLAGa6de1c80e [2022-07-21 02:03:30,344 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:03:30,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test17.c [2022-07-21 02:03:30,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368315fc2/2f2361d517954782be93cec3b488682b/FLAGa6de1c80e [2022-07-21 02:03:30,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368315fc2/2f2361d517954782be93cec3b488682b [2022-07-21 02:03:30,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:03:30,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:03:30,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:03:30,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:03:30,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:03:30,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:30,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0d0a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30, skipping insertion in model container [2022-07-21 02:03:30,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:30,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:03:30,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:03:30,940 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/ldv-regression/test17.c[377,390] [2022-07-21 02:03:30,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:03:30,954 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:03:30,964 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/ldv-regression/test17.c[377,390] [2022-07-21 02:03:30,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:03:30,977 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:03:30,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30 WrapperNode [2022-07-21 02:03:30,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:03:30,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:03:30,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:03:30,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:03:30,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:30,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,009 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2022-07-21 02:03:31,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:03:31,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:03:31,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:03:31,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:03:31,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:03:31,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:03:31,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:03:31,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:03:31,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (1/1) ... [2022-07-21 02:03:31,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:03:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:03:31,055 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 02:03:31,066 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 02:03:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:03:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:03:31,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:03:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:03:31,141 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:03:31,143 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:03:31,244 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:03:31,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:03:31,249 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 02:03:31,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:03:31 BoogieIcfgContainer [2022-07-21 02:03:31,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:03:31,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:03:31,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:03:31,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:03:31,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:03:30" (1/3) ... [2022-07-21 02:03:31,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7c26bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:03:31, skipping insertion in model container [2022-07-21 02:03:31,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:03:30" (2/3) ... [2022-07-21 02:03:31,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7c26bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:03:31, skipping insertion in model container [2022-07-21 02:03:31,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:03:31" (3/3) ... [2022-07-21 02:03:31,268 INFO L111 eAbstractionObserver]: Analyzing ICFG test17.c [2022-07-21 02:03:31,279 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:03:31,293 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:03:31,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:03:31,357 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@3b0f1cfb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7505bb55 [2022-07-21 02:03:31,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:03:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 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 02:03:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 02:03:31,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:03:31,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 02:03:31,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:03:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:03:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash 925607, now seen corresponding path program 1 times [2022-07-21 02:03:31,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:03:31,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680460451] [2022-07-21 02:03:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:03:31,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:03:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:03:31,603 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 02:03:31,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:03:31,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680460451] [2022-07-21 02:03:31,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680460451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:03:31,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:03:31,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 02:03:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825906317] [2022-07-21 02:03:31,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:03:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 02:03:31,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:03:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 02:03:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:03:31,647 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 02:03:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:03:31,664 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2022-07-21 02:03:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 02:03:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2022-07-21 02:03:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:03:31,671 INFO L225 Difference]: With dead ends: 13 [2022-07-21 02:03:31,671 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 02:03:31,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 02:03:31,678 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:03:31,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:03:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 02:03:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 02:03:31,698 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 02:03:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 02:03:31,703 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2022-07-21 02:03:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:03:31,704 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 02:03:31,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 02:03:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 02:03:31,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 02:03:31,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:03:31,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:03:31,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 02:03:31,733 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 02:03:31,733 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 02:03:31,733 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 02:03:31,733 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 02:03:31,734 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-07-21 02:03:31,734 INFO L895 garLoopResultBuilder]: At program point L20(lines 18 21) the Hoare annotation is: (and (= |ULTIMATE.start_equal_~b#1.offset| |ULTIMATE.start_equal_~a#1.offset|) (= |ULTIMATE.start_equal_~a#1.base| |ULTIMATE.start_equal_~b#1.base|)) [2022-07-21 02:03:31,734 INFO L895 garLoopResultBuilder]: At program point L13(lines 6 14) the Hoare annotation is: (and (= |ULTIMATE.start_equal_~b#1.offset| |ULTIMATE.start_equal_~a#1.offset|) (= |ULTIMATE.start_equal_~a#1.base| |ULTIMATE.start_equal_~b#1.base|)) [2022-07-21 02:03:31,734 INFO L895 garLoopResultBuilder]: At program point L8(lines 6 14) the Hoare annotation is: false [2022-07-21 02:03:31,735 INFO L899 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2022-07-21 02:03:31,737 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 02:03:31,740 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 02:03:31,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:03:31 BoogieIcfgContainer [2022-07-21 02:03:31,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 02:03:31,761 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 02:03:31,762 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 02:03:31,762 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 02:03:31,762 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:03:31" (3/4) ... [2022-07-21 02:03:31,765 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 02:03:31,771 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-07-21 02:03:31,772 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-21 02:03:31,772 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 02:03:31,772 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 02:03:31,796 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 02:03:31,797 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 02:03:31,798 INFO L158 Benchmark]: Toolchain (without parser) took 1016.69ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 25.9MB in the beginning and 36.9MB in the end (delta: -11.0MB). Peak memory consumption was 1.3MB. Max. memory is 16.1GB. [2022-07-21 02:03:31,798 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 48.2MB. Free memory was 30.3MB in the beginning and 30.2MB in the end (delta: 38.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:03:31,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.21ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 25.6MB in the beginning and 40.0MB in the end (delta: -14.4MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-07-21 02:03:31,799 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.04ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 38.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:03:31,800 INFO L158 Benchmark]: Boogie Preprocessor took 19.50ms. Allocated memory is still 58.7MB. Free memory was 38.7MB in the beginning and 37.8MB in the end (delta: 913.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:03:31,800 INFO L158 Benchmark]: RCFGBuilder took 219.18ms. Allocated memory is still 58.7MB. Free memory was 37.8MB in the beginning and 29.8MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 02:03:31,801 INFO L158 Benchmark]: TraceAbstraction took 508.91ms. Allocated memory is still 58.7MB. Free memory was 29.3MB in the beginning and 39.3MB in the end (delta: -10.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:03:31,801 INFO L158 Benchmark]: Witness Printer took 35.74ms. Allocated memory is still 58.7MB. Free memory was 39.0MB in the beginning and 36.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:03:31,804 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 48.2MB. Free memory was 30.3MB in the beginning and 30.2MB in the end (delta: 38.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.21ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 25.6MB in the beginning and 40.0MB in the end (delta: -14.4MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.04ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 38.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.50ms. Allocated memory is still 58.7MB. Free memory was 38.7MB in the beginning and 37.8MB in the end (delta: 913.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 219.18ms. Allocated memory is still 58.7MB. Free memory was 37.8MB in the beginning and 29.8MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 508.91ms. Allocated memory is still 58.7MB. Free memory was 29.3MB in the beginning and 39.3MB in the end (delta: -10.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 35.74ms. Allocated memory is still 58.7MB. Free memory was 39.0MB in the beginning and 36.9MB in the end (delta: 2.2MB). 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: 12]: 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 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1 IncrementalHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 5 mSDtfsCounter, 1 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 15 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: b == a && a == b - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: b == a && a == b - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2022-07-21 02:03:31,842 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: TRUE