./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/heavy-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/loops/heavy-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 26cfb5016cc2fdf76245f73dcfd6db92bad09f670b983fa3e94b365d8471a941 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:51:35,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:51:35,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:51:35,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:51:35,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:51:35,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:51:35,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:51:35,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:51:35,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:51:35,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:51:35,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:51:35,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:51:35,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:51:35,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:51:35,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:51:35,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:51:35,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:51:35,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:51:35,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:51:35,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:51:35,657 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:51:35,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:51:35,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:51:35,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:51:35,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:51:35,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:51:35,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:51:35,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:51:35,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:51:35,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:51:35,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:51:35,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:51:35,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:51:35,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:51:35,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:51:35,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:51:35,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:51:35,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:51:35,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:51:35,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:51:35,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:51:35,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:51:35,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 14:51:35,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:51:35,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:51:35,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:51:35,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:51:35,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:51:35,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:51:35,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:51:35,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:51:35,688 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:51:35,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:51:35,688 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:51:35,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:51:35,689 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:51:35,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:51:35,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:51:35,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:51:35,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:51:35,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:51:35,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:51:35,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:51:35,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:51:35,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 14:51:35,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 14:51:35,691 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:51:35,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:51:35,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:51:35,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26cfb5016cc2fdf76245f73dcfd6db92bad09f670b983fa3e94b365d8471a941 [2022-07-19 14:51:35,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:51:35,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:51:35,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:51:35,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:51:35,867 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:51:35,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/heavy-2.c [2022-07-19 14:51:35,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fb4ece2/f6d8e41aa09c46b599b22a59f60e92db/FLAG5654b8905 [2022-07-19 14:51:36,242 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:51:36,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-2.c [2022-07-19 14:51:36,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fb4ece2/f6d8e41aa09c46b599b22a59f60e92db/FLAG5654b8905 [2022-07-19 14:51:36,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fb4ece2/f6d8e41aa09c46b599b22a59f60e92db [2022-07-19 14:51:36,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:51:36,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:51:36,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:51:36,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:51:36,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:51:36,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdb066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36, skipping insertion in model container [2022-07-19 14:51:36,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:51:36,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:51:36,815 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/loops/heavy-2.c[600,613] [2022-07-19 14:51:36,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:51:36,862 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:51:36,876 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/loops/heavy-2.c[600,613] [2022-07-19 14:51:36,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:51:36,941 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:51:36,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36 WrapperNode [2022-07-19 14:51:36,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:51:36,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:51:36,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:51:36,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:51:36,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,981 INFO L137 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-07-19 14:51:36,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:51:36,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:51:36,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:51:36,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:51:36,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:36,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:37,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:37,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:37,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:51:37,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:51:37,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:51:37,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:51:37,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (1/1) ... [2022-07-19 14:51:37,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:51:37,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:37,037 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) [2022-07-19 14:51:37,039 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 [2022-07-19 14:51:37,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 14:51:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:51:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:51:37,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:51:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 14:51:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 14:51:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 14:51:37,115 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:51:37,116 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:51:37,234 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:51:37,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:51:37,238 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 14:51:37,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:51:37 BoogieIcfgContainer [2022-07-19 14:51:37,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:51:37,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:51:37,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:51:37,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:51:37,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:51:36" (1/3) ... [2022-07-19 14:51:37,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474b0d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:51:37, skipping insertion in model container [2022-07-19 14:51:37,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:51:36" (2/3) ... [2022-07-19 14:51:37,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474b0d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:51:37, skipping insertion in model container [2022-07-19 14:51:37,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:51:37" (3/3) ... [2022-07-19 14:51:37,253 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2022-07-19 14:51:37,263 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:51:37,263 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 14:51:37,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:51:37,307 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@4949f2a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b45e084 [2022-07-19 14:51:37,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 14:51:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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) [2022-07-19 14:51:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-19 14:51:37,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-19 14:51:37,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash 28726599, now seen corresponding path program 1 times [2022-07-19 14:51:37,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737591636] [2022-07-19 14:51:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737591636] [2022-07-19 14:51:37,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737591636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:37,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:37,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 14:51:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302799006] [2022-07-19 14:51:37,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 14:51:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 14:51:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:51:37,424 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:37,432 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2022-07-19 14:51:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 14:51:37,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-07-19 14:51:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:37,440 INFO L225 Difference]: With dead ends: 26 [2022-07-19 14:51:37,440 INFO L226 Difference]: Without dead ends: 11 [2022-07-19 14:51:37,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:51:37,445 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:37,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-19 14:51:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-19 14:51:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-07-19 14:51:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-07-19 14:51:37,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2022-07-19 14:51:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:37,468 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-07-19 14:51:37,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-07-19 14:51:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-19 14:51:37,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-19 14:51:37,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 14:51:37,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,470 INFO L85 PathProgramCache]: Analyzing trace with hash 28697769, now seen corresponding path program 1 times [2022-07-19 14:51:37,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456353572] [2022-07-19 14:51:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456353572] [2022-07-19 14:51:37,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456353572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:37,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:37,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:51:37,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643851964] [2022-07-19 14:51:37,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:37,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:51:37,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:51:37,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:51:37,556 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:37,580 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-07-19 14:51:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:51:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-07-19 14:51:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:37,581 INFO L225 Difference]: With dead ends: 20 [2022-07-19 14:51:37,581 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 14:51:37,582 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 [2022-07-19 14:51:37,583 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:37,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 14:51:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2022-07-19 14:51:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-07-19 14:51:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-19 14:51:37,588 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2022-07-19 14:51:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:37,589 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-19 14:51:37,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-19 14:51:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-19 14:51:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 14:51:37,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:37,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 14:51:37,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash 269702257, now seen corresponding path program 1 times [2022-07-19 14:51:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777426522] [2022-07-19 14:51:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777426522] [2022-07-19 14:51:37,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777426522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:37,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:37,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:51:37,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318984455] [2022-07-19 14:51:37,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:37,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:51:37,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:51:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:51:37,637 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-19 14:51:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:37,654 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-07-19 14:51:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:51:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-07-19 14:51:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:37,656 INFO L225 Difference]: With dead ends: 25 [2022-07-19 14:51:37,656 INFO L226 Difference]: Without dead ends: 16 [2022-07-19 14:51:37,658 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 [2022-07-19 14:51:37,660 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:37,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-19 14:51:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2022-07-19 14:51:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-07-19 14:51:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-19 14:51:37,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-07-19 14:51:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:37,666 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-19 14:51:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-19 14:51:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-19 14:51:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 14:51:37,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:37,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 14:51:37,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash 904437765, now seen corresponding path program 1 times [2022-07-19 14:51:37,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044071865] [2022-07-19 14:51:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044071865] [2022-07-19 14:51:37,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044071865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:37,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:51:37,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:51:37,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732199632] [2022-07-19 14:51:37,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:37,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:51:37,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:37,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:51:37,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:51:37,720 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-19 14:51:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:37,731 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-07-19 14:51:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:51:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-07-19 14:51:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:37,732 INFO L225 Difference]: With dead ends: 25 [2022-07-19 14:51:37,732 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 14:51:37,733 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 [2022-07-19 14:51:37,737 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:37,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 14:51:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-19 14:51:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-19 14:51:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-19 14:51:37,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2022-07-19 14:51:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:37,743 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-19 14:51:37,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-19 14:51:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-19 14:51:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 14:51:37,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:37,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:37,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 14:51:37,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2012164797, now seen corresponding path program 1 times [2022-07-19 14:51:37,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:37,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379301363] [2022-07-19 14:51:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379301363] [2022-07-19 14:51:37,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379301363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:37,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293308949] [2022-07-19 14:51:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:37,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:37,824 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) [2022-07-19 14:51:37,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 14:51:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 14:51:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:51:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:51:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:37,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293308949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:51:37,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:51:37,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-07-19 14:51:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004957876] [2022-07-19 14:51:37,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:51:37,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 14:51:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 14:51:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-07-19 14:51:37,965 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-07-19 14:51:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:38,047 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-07-19 14:51:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 14:51:38,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 13 [2022-07-19 14:51:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:38,048 INFO L225 Difference]: With dead ends: 44 [2022-07-19 14:51:38,048 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 14:51:38,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-07-19 14:51:38,049 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:38,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 14:51:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2022-07-19 14:51:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-07-19 14:51:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-19 14:51:38,052 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-07-19 14:51:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:38,053 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-19 14:51:38,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-07-19 14:51:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-19 14:51:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 14:51:38,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:51:38,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:51:38,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 14:51:38,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:38,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:51:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:51:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -924137475, now seen corresponding path program 2 times [2022-07-19 14:51:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:51:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085917539] [2022-07-19 14:51:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:51:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:51:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:51:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:51:38,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:51:38,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085917539] [2022-07-19 14:51:38,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085917539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:51:38,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478417250] [2022-07-19 14:51:38,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:51:38,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:51:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:51:38,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:51:38,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 14:51:38,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 14:51:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:51:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 14:51:38,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:51:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 14:51:38,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:51:38,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478417250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:51:38,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 14:51:38,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 14:51:38,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415579614] [2022-07-19 14:51:38,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:51:38,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:51:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:51:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:51:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:51:38,552 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-19 14:51:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:51:38,556 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-07-19 14:51:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:51:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 19 [2022-07-19 14:51:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:51:38,557 INFO L225 Difference]: With dead ends: 20 [2022-07-19 14:51:38,557 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 14:51:38,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:51:38,558 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:51:38,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:51:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 14:51:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 14:51:38,559 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) [2022-07-19 14:51:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 14:51:38,560 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2022-07-19 14:51:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:51:38,560 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 14:51:38,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-19 14:51:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 14:51:38,560 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 14:51:38,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 14:51:38,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 14:51:38,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 14:51:38,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 14:51:38,806 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 14:51:38,806 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2022-07-19 14:51:38,807 INFO L895 garLoopResultBuilder]: At program point L13-3(lines 13 15) the Hoare annotation is: (= |ULTIMATE.start_main_~a~0#1| 1) [2022-07-19 14:51:38,807 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 14:51:38,807 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 14:51:38,807 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 14:51:38,807 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-07-19 14:51:38,807 INFO L902 garLoopResultBuilder]: At program point L22(lines 7 23) the Hoare annotation is: true [2022-07-19 14:51:38,807 INFO L895 garLoopResultBuilder]: At program point L18(lines 8 23) the Hoare annotation is: false [2022-07-19 14:51:38,807 INFO L899 garLoopResultBuilder]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2022-07-19 14:51:38,808 INFO L895 garLoopResultBuilder]: At program point L14-3(lines 14 15) the Hoare annotation is: (= |ULTIMATE.start_main_~a~0#1| 1) [2022-07-19 14:51:38,808 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2022-07-19 14:51:38,808 INFO L895 garLoopResultBuilder]: At program point L12-3(lines 12 15) the Hoare annotation is: (= |ULTIMATE.start_main_~a~0#1| 1) [2022-07-19 14:51:38,808 INFO L899 garLoopResultBuilder]: For program point L12-4(lines 8 23) no Hoare annotation was computed. [2022-07-19 14:51:38,810 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-07-19 14:51:38,811 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 14:51:38,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 02:51:38 BoogieIcfgContainer [2022-07-19 14:51:38,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 14:51:38,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 14:51:38,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 14:51:38,822 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 14:51:38,822 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:51:37" (3/4) ... [2022-07-19 14:51:38,824 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 14:51:38,830 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-19 14:51:38,831 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-19 14:51:38,831 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 14:51:38,831 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 14:51:38,850 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 14:51:38,851 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 14:51:38,851 INFO L158 Benchmark]: Toolchain (without parser) took 2188.16ms. Allocated memory was 104.9MB in the beginning and 140.5MB in the end (delta: 35.7MB). Free memory was 83.5MB in the beginning and 103.7MB in the end (delta: -20.2MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2022-07-19 14:51:38,851 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 60.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 14:51:38,852 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.73ms. Allocated memory was 104.9MB in the beginning and 140.5MB in the end (delta: 35.7MB). Free memory was 83.1MB in the beginning and 84.0MB in the end (delta: -818.8kB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-07-19 14:51:38,852 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.54ms. Allocated memory is still 140.5MB. Free memory was 83.5MB in the beginning and 82.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 14:51:38,852 INFO L158 Benchmark]: Boogie Preprocessor took 20.15ms. Allocated memory is still 140.5MB. Free memory was 82.3MB in the beginning and 81.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 14:51:38,852 INFO L158 Benchmark]: RCFGBuilder took 237.03ms. Allocated memory is still 140.5MB. Free memory was 80.7MB in the beginning and 116.7MB in the end (delta: -35.9MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2022-07-19 14:51:38,853 INFO L158 Benchmark]: TraceAbstraction took 1573.92ms. Allocated memory is still 140.5MB. Free memory was 116.7MB in the beginning and 105.7MB in the end (delta: 10.9MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2022-07-19 14:51:38,853 INFO L158 Benchmark]: Witness Printer took 29.36ms. Allocated memory is still 140.5MB. Free memory was 105.7MB in the beginning and 103.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 14:51:38,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 60.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.73ms. Allocated memory was 104.9MB in the beginning and 140.5MB in the end (delta: 35.7MB). Free memory was 83.1MB in the beginning and 84.0MB in the end (delta: -818.8kB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.54ms. Allocated memory is still 140.5MB. Free memory was 83.5MB in the beginning and 82.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.15ms. Allocated memory is still 140.5MB. Free memory was 82.3MB in the beginning and 81.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 237.03ms. Allocated memory is still 140.5MB. Free memory was 80.7MB in the beginning and 116.7MB in the end (delta: -35.9MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * TraceAbstraction took 1573.92ms. Allocated memory is still 140.5MB. Free memory was 116.7MB in the beginning and 105.7MB in the end (delta: 10.9MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Witness Printer took 29.36ms. Allocated memory is still 140.5MB. Free memory was 105.7MB in the beginning and 103.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: 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, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 116 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55 IncrementalHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 67 mSDtfsCounter, 55 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, InterpolantAutomatonStates: 25, 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, 6 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 15 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 117 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 93 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 239 SizeOfPredicates, 3 NumberOfNonLiveVariables, 131 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 29/48 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: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: a == 1 RESULT: Ultimate proved your program to be correct! [2022-07-19 14:51:38,881 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