./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/quick_sort_split.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/heap-data/quick_sort_split.i -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 608b74039fb15a247aaf810504577eacfdbb21e6889e19896989d0cd0427fa05 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:59:22,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:59:22,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:59:22,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:59:22,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:59:22,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:59:22,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:59:22,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:59:22,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:59:22,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:59:22,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:59:22,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:59:22,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:59:22,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:59:22,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:59:22,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:59:22,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:59:22,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:59:22,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:59:22,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:59:22,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:59:22,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:59:22,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:59:22,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:59:22,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:59:22,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:59:22,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:59:22,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:59:22,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:59:22,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:59:22,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:59:22,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:59:22,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:59:22,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:59:22,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:59:22,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:59:22,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:59:22,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:59:22,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:59:22,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:59:22,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:59:22,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:59:23,016 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:59:23,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:59:23,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:59:23,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:59:23,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:59:23,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:59:23,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:59:23,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:59:23,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:59:23,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:59:23,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:59:23,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:59:23,034 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:59:23,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:59:23,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:59:23,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:59:23,035 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608b74039fb15a247aaf810504577eacfdbb21e6889e19896989d0cd0427fa05 [2021-12-15 23:59:23,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:59:23,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:59:23,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:59:23,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:59:23,240 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:59:23,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/quick_sort_split.i [2021-12-15 23:59:23,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5ae8cdf/91f55961e86e4908b20462b48fef7ef8/FLAG77fa706da [2021-12-15 23:59:23,634 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:59:23,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/quick_sort_split.i [2021-12-15 23:59:23,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5ae8cdf/91f55961e86e4908b20462b48fef7ef8/FLAG77fa706da [2021-12-15 23:59:24,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5ae8cdf/91f55961e86e4908b20462b48fef7ef8 [2021-12-15 23:59:24,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:59:24,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:59:24,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:59:24,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:59:24,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:59:24,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b84b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24, skipping insertion in model container [2021-12-15 23:59:24,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:59:24,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:59:24,396 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/heap-data/quick_sort_split.i[23986,23999] [2021-12-15 23:59:24,398 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/heap-data/quick_sort_split.i[24106,24119] [2021-12-15 23:59:24,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:59:24,404 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:59:24,425 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/heap-data/quick_sort_split.i[23986,23999] [2021-12-15 23:59:24,426 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/heap-data/quick_sort_split.i[24106,24119] [2021-12-15 23:59:24,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:59:24,443 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:59:24,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24 WrapperNode [2021-12-15 23:59:24,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:59:24,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:59:24,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:59:24,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:59:24,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,475 INFO L137 Inliner]: procedures = 125, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2021-12-15 23:59:24,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:59:24,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:59:24,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:59:24,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:59:24,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:59:24,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:59:24,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:59:24,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:59:24,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (1/1) ... [2021-12-15 23:59:24,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:59:24,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:59:24,525 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) [2021-12-15 23:59:24,541 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 [2021-12-15 23:59:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 23:59:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 23:59:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 23:59:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:59:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 23:59:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 23:59:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 23:59:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 23:59:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 23:59:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:59:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_list [2021-12-15 23:59:24,551 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_list [2021-12-15 23:59:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:59:24,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:59:24,628 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:59:24,629 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:59:24,770 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:59:24,775 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:59:24,775 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 23:59:24,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:59:24 BoogieIcfgContainer [2021-12-15 23:59:24,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:59:24,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:59:24,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:59:24,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:59:24,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:59:24" (1/3) ... [2021-12-15 23:59:24,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2951c260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:59:24, skipping insertion in model container [2021-12-15 23:59:24,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:59:24" (2/3) ... [2021-12-15 23:59:24,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2951c260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:59:24, skipping insertion in model container [2021-12-15 23:59:24,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:59:24" (3/3) ... [2021-12-15 23:59:24,783 INFO L111 eAbstractionObserver]: Analyzing ICFG quick_sort_split.i [2021-12-15 23:59:24,788 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:59:24,789 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 23:59:24,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:59:24,833 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:59:24,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 23:59:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-15 23:59:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 23:59:24,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:59:24,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:59:24,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:59:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:59:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2051498666, now seen corresponding path program 1 times [2021-12-15 23:59:24,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:59:24,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245491109] [2021-12-15 23:59:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:59:24,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:59:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:59:24,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:59:24,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245491109] [2021-12-15 23:59:24,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245491109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:59:24,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:59:24,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:59:24,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408914204] [2021-12-15 23:59:24,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:59:24,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 23:59:24,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:59:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 23:59:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 23:59:25,033 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-12-15 23:59:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:59:25,055 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-12-15 23:59:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 23:59:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2021-12-15 23:59:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:59:25,063 INFO L225 Difference]: With dead ends: 46 [2021-12-15 23:59:25,064 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 23:59:25,066 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:59:25,069 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2021-12-15 23:59:25,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:59:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 23:59:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-15 23:59:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-15 23:59:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-15 23:59:25,106 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 9 [2021-12-15 23:59:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:59:25,106 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-15 23:59:25,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-12-15 23:59:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-15 23:59:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 23:59:25,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:59:25,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:59:25,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:59:25,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:59:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:59:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -804873315, now seen corresponding path program 1 times [2021-12-15 23:59:25,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:59:25,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076655668] [2021-12-15 23:59:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:59:25,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:59:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:59:25,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:59:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076655668] [2021-12-15 23:59:25,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076655668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:59:25,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:59:25,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:59:25,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895386051] [2021-12-15 23:59:25,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:59:25,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:59:25,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:59:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:59:25,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:59:25,156 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-15 23:59:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:59:25,164 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-12-15 23:59:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:59:25,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-12-15 23:59:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:59:25,165 INFO L225 Difference]: With dead ends: 31 [2021-12-15 23:59:25,166 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 23:59:25,166 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:59:25,167 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:59:25,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:59:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 23:59:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 23:59:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-15 23:59:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-12-15 23:59:25,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 10 [2021-12-15 23:59:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:59:25,173 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-12-15 23:59:25,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-12-15 23:59:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-12-15 23:59:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 23:59:25,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:59:25,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:59:25,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:59:25,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:59:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:59:25,176 INFO L85 PathProgramCache]: Analyzing trace with hash 818688432, now seen corresponding path program 1 times [2021-12-15 23:59:25,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:59:25,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750464903] [2021-12-15 23:59:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:59:25,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:59:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:59:25,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:59:25,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750464903] [2021-12-15 23:59:25,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750464903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:59:25,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:59:25,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:59:25,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794858674] [2021-12-15 23:59:25,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:59:25,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:59:25,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:59:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:59:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:59:25,240 INFO L87 Difference]: Start difference. First operand 21 states and 26 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) [2021-12-15 23:59:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:59:25,246 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-12-15 23:59:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:59:25,247 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 [2021-12-15 23:59:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:59:25,247 INFO L225 Difference]: With dead ends: 22 [2021-12-15 23:59:25,247 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 23:59:25,248 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:59:25,248 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:59:25,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:59:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 23:59:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 23:59:25,250 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) [2021-12-15 23:59:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 23:59:25,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-12-15 23:59:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:59:25,251 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 23:59:25,251 INFO L471 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) [2021-12-15 23:59:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 23:59:25,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 23:59:25,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-15 23:59:25,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-15 23:59:25,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:59:25,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-15 23:59:25,269 INFO L858 garLoopResultBuilder]: For program point L609(lines 609 610) no Hoare annotation was computed. [2021-12-15 23:59:25,269 INFO L858 garLoopResultBuilder]: For program point L609-2(lines 609 610) no Hoare annotation was computed. [2021-12-15 23:59:25,269 INFO L858 garLoopResultBuilder]: For program point L605(line 605) no Hoare annotation was computed. [2021-12-15 23:59:25,269 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 610) no Hoare annotation was computed. [2021-12-15 23:59:25,269 INFO L858 garLoopResultBuilder]: For program point L597(line 597) no Hoare annotation was computed. [2021-12-15 23:59:25,270 INFO L858 garLoopResultBuilder]: For program point L597-2(line 597) no Hoare annotation was computed. [2021-12-15 23:59:25,270 INFO L861 garLoopResultBuilder]: At program point L589(lines 580 590) the Hoare annotation is: true [2021-12-15 23:59:25,270 INFO L861 garLoopResultBuilder]: At program point L585(line 585) the Hoare annotation is: true [2021-12-15 23:59:25,270 INFO L858 garLoopResultBuilder]: For program point L610(line 610) no Hoare annotation was computed. [2021-12-15 23:59:25,270 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-15 23:59:25,271 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-15 23:59:25,271 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-15 23:59:25,271 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 605) no Hoare annotation was computed. [2021-12-15 23:59:25,272 INFO L858 garLoopResultBuilder]: For program point L582-1(lines 582 588) no Hoare annotation was computed. [2021-12-15 23:59:25,272 INFO L858 garLoopResultBuilder]: For program point L582-3(lines 582 588) no Hoare annotation was computed. [2021-12-15 23:59:25,273 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-15 23:59:25,273 INFO L858 garLoopResultBuilder]: For program point L603-1(lines 591 613) no Hoare annotation was computed. [2021-12-15 23:59:25,273 INFO L858 garLoopResultBuilder]: For program point L591(lines 591 613) no Hoare annotation was computed. [2021-12-15 23:59:25,274 INFO L861 garLoopResultBuilder]: At program point L587(line 587) the Hoare annotation is: true [2021-12-15 23:59:25,274 INFO L861 garLoopResultBuilder]: At program point L587-1(lines 582 588) the Hoare annotation is: true [2021-12-15 23:59:25,274 INFO L858 garLoopResultBuilder]: For program point L608-1(lines 591 613) no Hoare annotation was computed. [2021-12-15 23:59:25,274 INFO L858 garLoopResultBuilder]: For program point L604(lines 604 605) no Hoare annotation was computed. [2021-12-15 23:59:25,274 INFO L858 garLoopResultBuilder]: For program point L604-2(lines 604 605) no Hoare annotation was computed. [2021-12-15 23:59:25,274 INFO L854 garLoopResultBuilder]: At program point L596-2(lines 596 602) the Hoare annotation is: (and (= |ULTIMATE.start_main_~low~0#1.base| 0) (= |ULTIMATE.start_main_~low~0#1.offset| 0) (= |ULTIMATE.start_main_~high~0#1.base| 0) (= |ULTIMATE.start_main_~high~0#1.offset| 0)) [2021-12-15 23:59:25,275 INFO L858 garLoopResultBuilder]: For program point L584(lines 584 587) no Hoare annotation was computed. [2021-12-15 23:59:25,275 INFO L858 garLoopResultBuilder]: For program point append_to_listEXIT(lines 573 579) no Hoare annotation was computed. [2021-12-15 23:59:25,275 INFO L861 garLoopResultBuilder]: At program point append_to_listENTRY(lines 573 579) the Hoare annotation is: true [2021-12-15 23:59:25,275 INFO L858 garLoopResultBuilder]: For program point append_to_listFINAL(lines 573 579) no Hoare annotation was computed. [2021-12-15 23:59:25,282 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-15 23:59:25,284 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 23:59:25,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:59:25 BoogieIcfgContainer [2021-12-15 23:59:25,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 23:59:25,302 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 23:59:25,302 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 23:59:25,302 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 23:59:25,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:59:24" (3/4) ... [2021-12-15 23:59:25,305 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-15 23:59:25,310 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure append_to_list [2021-12-15 23:59:25,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-15 23:59:25,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-15 23:59:25,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-15 23:59:25,316 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-15 23:59:25,351 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-15 23:59:25,352 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 23:59:25,353 INFO L158 Benchmark]: Toolchain (without parser) took 1318.79ms. Allocated memory is still 136.3MB. Free memory was 107.7MB in the beginning and 91.0MB in the end (delta: 16.7MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-12-15 23:59:25,353 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 83.9MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:59:25,353 INFO L158 Benchmark]: CACSL2BoogieTranslator took 391.84ms. Allocated memory is still 136.3MB. Free memory was 107.4MB in the beginning and 106.8MB in the end (delta: 559.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 23:59:25,354 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.50ms. Allocated memory is still 136.3MB. Free memory was 106.8MB in the beginning and 105.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:59:25,354 INFO L158 Benchmark]: Boogie Preprocessor took 17.80ms. Allocated memory is still 136.3MB. Free memory was 105.0MB in the beginning and 103.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:59:25,354 INFO L158 Benchmark]: RCFGBuilder took 282.72ms. Allocated memory is still 136.3MB. Free memory was 103.3MB in the beginning and 90.1MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 23:59:25,354 INFO L158 Benchmark]: TraceAbstraction took 523.11ms. Allocated memory is still 136.3MB. Free memory was 89.6MB in the beginning and 94.4MB in the end (delta: -4.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:59:25,354 INFO L158 Benchmark]: Witness Printer took 49.72ms. Allocated memory is still 136.3MB. Free memory was 94.4MB in the beginning and 91.0MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:59:25,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 83.9MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 391.84ms. Allocated memory is still 136.3MB. Free memory was 107.4MB in the beginning and 106.8MB in the end (delta: 559.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.50ms. Allocated memory is still 136.3MB. Free memory was 106.8MB in the beginning and 105.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.80ms. Allocated memory is still 136.3MB. Free memory was 105.0MB in the beginning and 103.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 282.72ms. Allocated memory is still 136.3MB. Free memory was 103.3MB in the beginning and 90.1MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 523.11ms. Allocated memory is still 136.3MB. Free memory was 89.6MB in the beginning and 94.4MB in the end (delta: -4.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 49.72ms. Allocated memory is still 136.3MB. Free memory was 94.4MB in the beginning and 91.0MB in the end (delta: 3.4MB). 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: 605]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 610]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 104 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 78 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 7 PreInvPairs, 9 NumberOfFragments, 18 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 57 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 2 specifications checked. All of them hold - InvariantResult [Line: 580]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 582]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 596]: Loop Invariant Derived loop invariant: ((low == 0 && low == 0) && high == 0) && high == 0 RESULT: Ultimate proved your program to be correct! [2021-12-15 23:59:25,388 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