./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/apache-get-tag.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/loop-invgen/apache-get-tag.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 ad8e21886f5f45a7c58400298498a881b4f628bf6fff913be81ab14cf250dd19 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:36:23,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:36:23,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:36:23,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:36:23,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:36:23,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:36:23,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:36:23,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:36:23,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:36:23,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:36:23,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:36:23,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:36:23,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:36:23,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:36:23,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:36:23,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:36:23,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:36:23,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:36:23,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:36:23,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:36:23,545 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:36:23,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:36:23,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:36:23,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:36:23,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:36:23,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:36:23,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:36:23,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:36:23,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:36:23,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:36:23,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:36:23,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:36:23,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:36:23,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:36:23,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:36:23,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:36:23,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:36:23,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:36:23,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:36:23,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:36:23,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:36:23,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:36:23,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:36:23,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:36:23,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:36:23,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:36:23,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:36:23,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:36:23,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:36:23,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:36:23,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:36:23,583 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:36:23,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:36:23,583 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:36:23,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:36:23,585 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:36:23,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:36:23,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:36:23,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:36:23,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:36:23,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:36:23,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:36:23,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:36:23,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:36:23,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:36:23,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:36:23,586 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:36:23,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:36:23,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:36:23,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad8e21886f5f45a7c58400298498a881b4f628bf6fff913be81ab14cf250dd19 [2022-07-13 15:36:23,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:36:23,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:36:23,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:36:23,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:36:23,804 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:36:23,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/apache-get-tag.i [2022-07-13 15:36:23,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929fc4f93/1e1de66eb66440d782e16748796c5e40/FLAGf1ce30268 [2022-07-13 15:36:24,176 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:36:24,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/apache-get-tag.i [2022-07-13 15:36:24,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929fc4f93/1e1de66eb66440d782e16748796c5e40/FLAGf1ce30268 [2022-07-13 15:36:24,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929fc4f93/1e1de66eb66440d782e16748796c5e40 [2022-07-13 15:36:24,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:36:24,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:36:24,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:36:24,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:36:24,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:36:24,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b1a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24, skipping insertion in model container [2022-07-13 15:36:24,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:36:24,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:36:24,734 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/loop-invgen/apache-get-tag.i[893,906] [2022-07-13 15:36:24,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:36:24,750 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:36:24,758 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/loop-invgen/apache-get-tag.i[893,906] [2022-07-13 15:36:24,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:36:24,770 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:36:24,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24 WrapperNode [2022-07-13 15:36:24,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:36:24,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:36:24,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:36:24,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:36:24,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,791 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2022-07-13 15:36:24,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:36:24,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:36:24,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:36:24,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:36:24,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:36:24,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:36:24,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:36:24,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:36:24,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (1/1) ... [2022-07-13 15:36:24,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:36:24,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:24,824 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) [2022-07-13 15:36:24,831 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 [2022-07-13 15:36:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:36:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:36:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:36:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:36:24,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 15:36:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 15:36:24,885 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:36:24,887 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:36:25,026 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:36:25,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:36:25,037 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 15:36:25,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:36:25 BoogieIcfgContainer [2022-07-13 15:36:25,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:36:25,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:36:25,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:36:25,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:36:25,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:36:24" (1/3) ... [2022-07-13 15:36:25,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdac82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:36:25, skipping insertion in model container [2022-07-13 15:36:25,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:36:24" (2/3) ... [2022-07-13 15:36:25,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdac82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:36:25, skipping insertion in model container [2022-07-13 15:36:25,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:36:25" (3/3) ... [2022-07-13 15:36:25,061 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2022-07-13 15:36:25,072 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:36:25,072 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:36:25,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:36:25,105 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@7e4fac80, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ce12ce4 [2022-07-13 15:36:25,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:36:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 29 states have internal predecessors, (38), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-13 15:36:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 15:36:25,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:25,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:25,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:25,116 INFO L85 PathProgramCache]: Analyzing trace with hash -587348936, now seen corresponding path program 1 times [2022-07-13 15:36:25,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:25,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40356480] [2022-07-13 15:36:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:25,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:25,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40356480] [2022-07-13 15:36:25,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40356480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:36:25,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:36:25,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:36:25,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938799311] [2022-07-13 15:36:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:36:25,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:36:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:36:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:36:25,263 INFO L87 Difference]: Start difference. First operand has 43 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 29 states have internal predecessors, (38), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:25,289 INFO L93 Difference]: Finished difference Result 82 states and 151 transitions. [2022-07-13 15:36:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:36:25,291 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-13 15:36:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:25,300 INFO L225 Difference]: With dead ends: 82 [2022-07-13 15:36:25,300 INFO L226 Difference]: Without dead ends: 39 [2022-07-13 15:36:25,306 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 [2022-07-13 15:36:25,311 INFO L413 NwaCegarLoop]: 65 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, 65 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 [2022-07-13 15:36:25,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:36:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-13 15:36:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-13 15:36:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-13 15:36:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2022-07-13 15:36:25,357 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 9 [2022-07-13 15:36:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:25,357 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2022-07-13 15:36:25,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2022-07-13 15:36:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 15:36:25,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:25,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:36:25,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1057175647, now seen corresponding path program 1 times [2022-07-13 15:36:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:25,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666037325] [2022-07-13 15:36:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:25,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666037325] [2022-07-13 15:36:25,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666037325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:36:25,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:36:25,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:36:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321855814] [2022-07-13 15:36:25,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:36:25,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:36:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:36:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:36:25,450 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:25,540 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2022-07-13 15:36:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:36:25,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 15:36:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:25,542 INFO L225 Difference]: With dead ends: 45 [2022-07-13 15:36:25,543 INFO L226 Difference]: Without dead ends: 43 [2022-07-13 15:36:25,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:36:25,545 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:25,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 83 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-13 15:36:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-13 15:36:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-13 15:36:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2022-07-13 15:36:25,559 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 10 [2022-07-13 15:36:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:25,560 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2022-07-13 15:36:25,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:36:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2022-07-13 15:36:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 15:36:25,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:25,564 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:25,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:36:25,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:25,569 INFO L85 PathProgramCache]: Analyzing trace with hash 986719232, now seen corresponding path program 1 times [2022-07-13 15:36:25,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:25,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976529348] [2022-07-13 15:36:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:25,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 15:36:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:25,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976529348] [2022-07-13 15:36:25,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976529348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:36:25,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:36:25,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:36:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642170880] [2022-07-13 15:36:25,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:36:25,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:36:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:36:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:36:25,667 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:36:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:25,733 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2022-07-13 15:36:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:36:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-13 15:36:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:25,735 INFO L225 Difference]: With dead ends: 58 [2022-07-13 15:36:25,735 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 15:36:25,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:36:25,736 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:25,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 193 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 15:36:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-07-13 15:36:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 15:36:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-13 15:36:25,741 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 15 [2022-07-13 15:36:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:25,742 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-13 15:36:25,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:36:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-13 15:36:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 15:36:25,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:25,743 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:25,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 15:36:25,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1700663812, now seen corresponding path program 1 times [2022-07-13 15:36:25,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:25,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941688799] [2022-07-13 15:36:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:25,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 15:36:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:36:25,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:25,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941688799] [2022-07-13 15:36:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941688799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:36:25,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:36:25,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:36:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927824180] [2022-07-13 15:36:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:36:25,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:36:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:36:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:36:25,787 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:36:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:25,860 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-07-13 15:36:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:36:25,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-13 15:36:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:25,864 INFO L225 Difference]: With dead ends: 56 [2022-07-13 15:36:25,865 INFO L226 Difference]: Without dead ends: 54 [2022-07-13 15:36:25,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:36:25,874 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:25,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 118 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-13 15:36:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-07-13 15:36:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 15:36:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-07-13 15:36:25,897 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 16 [2022-07-13 15:36:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:25,897 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-07-13 15:36:25,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 15:36:25,898 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-07-13 15:36:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:36:25,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:36:25,899 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:36:25,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 15:36:25,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:36:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:36:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 367468842, now seen corresponding path program 1 times [2022-07-13 15:36:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:36:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564391572] [2022-07-13 15:36:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:25,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:36:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:26,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 15:36:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:26,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 15:36:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:26,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 15:36:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:36:26,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:36:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564391572] [2022-07-13 15:36:26,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564391572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:36:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019063065] [2022-07-13 15:36:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:36:26,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:36:26,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:36:26,048 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) [2022-07-13 15:36:26,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:36:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:36:26,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 15:36:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:36:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:36:26,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:36:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 15:36:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019063065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:36:26,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:36:26,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-07-13 15:36:26,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392771509] [2022-07-13 15:36:26,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:36:26,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 15:36:26,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:36:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 15:36:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:36:26,381 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 15:36:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:36:26,570 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-07-13 15:36:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 15:36:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 30 [2022-07-13 15:36:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:36:26,573 INFO L225 Difference]: With dead ends: 76 [2022-07-13 15:36:26,573 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 15:36:26,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-13 15:36:26,575 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 78 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:36:26,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 155 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:36:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 15:36:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 15:36:26,575 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) [2022-07-13 15:36:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 15:36:26,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-07-13 15:36:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:36:26,576 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 15:36:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 15:36:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 15:36:26,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 15:36:26,578 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 15:36:26,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:36:26,791 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 [2022-07-13 15:36:26,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 15:36:26,949 INFO L895 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,950 INFO L895 garLoopResultBuilder]: At program point L60-1(line 60) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,950 INFO L895 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,950 INFO L895 garLoopResultBuilder]: At program point L56-1(line 56) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,950 INFO L895 garLoopResultBuilder]: At program point L48-2(lines 48 72) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= 1 |ULTIMATE.start_main_~tagbuf_len~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,950 INFO L895 garLoopResultBuilder]: At program point L48-3(lines 48 72) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,950 INFO L895 garLoopResultBuilder]: At program point L73(line 73) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,951 INFO L895 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,951 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-13 15:36:26,951 INFO L895 garLoopResultBuilder]: At program point L32-2(lines 32 44) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,951 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-13 15:36:26,951 INFO L895 garLoopResultBuilder]: At program point L32-3(lines 32 44) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,951 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-13 15:36:26,951 INFO L899 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2022-07-13 15:36:26,951 INFO L899 garLoopResultBuilder]: For program point L49(lines 49 53) no Hoare annotation was computed. [2022-07-13 15:36:26,951 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,952 INFO L902 garLoopResultBuilder]: At program point L74(lines 25 77) the Hoare annotation is: true [2022-07-13 15:36:26,952 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,952 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,952 INFO L899 garLoopResultBuilder]: For program point L70(line 70) no Hoare annotation was computed. [2022-07-13 15:36:26,952 INFO L899 garLoopResultBuilder]: For program point L66(lines 66 68) no Hoare annotation was computed. [2022-07-13 15:36:26,952 INFO L899 garLoopResultBuilder]: For program point L33(lines 33 37) no Hoare annotation was computed. [2022-07-13 15:36:26,952 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-13 15:36:26,952 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-07-13 15:36:26,953 INFO L899 garLoopResultBuilder]: For program point L29-1(line 29) no Hoare annotation was computed. [2022-07-13 15:36:26,953 INFO L899 garLoopResultBuilder]: For program point L54(lines 54 68) no Hoare annotation was computed. [2022-07-13 15:36:26,953 INFO L895 garLoopResultBuilder]: At program point L54-1(lines 54 68) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= (+ |ULTIMATE.start_main_~t~0#1| 1) |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,953 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,953 INFO L895 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,953 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-07-13 15:36:26,953 INFO L899 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-07-13 15:36:26,953 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 40) no Hoare annotation was computed. [2022-07-13 15:36:26,953 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,954 INFO L895 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-07-13 15:36:26,954 INFO L899 garLoopResultBuilder]: For program point L59(lines 59 63) no Hoare annotation was computed. [2022-07-13 15:36:26,954 INFO L899 garLoopResultBuilder]: For program point L55(lines 55 64) no Hoare annotation was computed. [2022-07-13 15:36:26,954 INFO L902 garLoopResultBuilder]: At program point L76(lines 24 77) the Hoare annotation is: true [2022-07-13 15:36:26,954 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-07-13 15:36:26,954 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-07-13 15:36:26,954 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-07-13 15:36:26,954 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-07-13 15:36:26,955 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-07-13 15:36:26,955 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-07-13 15:36:26,957 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 15:36:26,958 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 15:36:26,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 03:36:26 BoogieIcfgContainer [2022-07-13 15:36:26,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 15:36:26,967 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 15:36:26,967 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 15:36:26,967 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 15:36:26,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:36:25" (3/4) ... [2022-07-13 15:36:26,969 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 15:36:26,973 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-13 15:36:26,975 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-13 15:36:26,976 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-13 15:36:26,976 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 15:36:26,976 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 15:36:27,001 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 15:36:27,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 15:36:27,002 INFO L158 Benchmark]: Toolchain (without parser) took 2401.06ms. Allocated memory was 107.0MB in the beginning and 132.1MB in the end (delta: 25.2MB). Free memory was 78.8MB in the beginning and 89.3MB in the end (delta: -10.4MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2022-07-13 15:36:27,003 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 107.0MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 15:36:27,003 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.92ms. Allocated memory was 107.0MB in the beginning and 132.1MB in the end (delta: 25.2MB). Free memory was 78.5MB in the beginning and 106.5MB in the end (delta: -28.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:36:27,003 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.56ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 104.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:36:27,004 INFO L158 Benchmark]: Boogie Preprocessor took 12.06ms. Allocated memory is still 132.1MB. Free memory was 104.8MB in the beginning and 103.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:36:27,004 INFO L158 Benchmark]: RCFGBuilder took 235.00ms. Allocated memory is still 132.1MB. Free memory was 103.7MB in the beginning and 92.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 15:36:27,005 INFO L158 Benchmark]: TraceAbstraction took 1923.04ms. Allocated memory is still 132.1MB. Free memory was 92.5MB in the beginning and 92.2MB in the end (delta: 294.3kB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2022-07-13 15:36:27,005 INFO L158 Benchmark]: Witness Printer took 34.94ms. Allocated memory is still 132.1MB. Free memory was 92.2MB in the beginning and 89.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:36:27,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 107.0MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.92ms. Allocated memory was 107.0MB in the beginning and 132.1MB in the end (delta: 25.2MB). Free memory was 78.5MB in the beginning and 106.5MB in the end (delta: -28.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.56ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 104.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.06ms. Allocated memory is still 132.1MB. Free memory was 104.8MB in the beginning and 103.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 235.00ms. Allocated memory is still 132.1MB. Free memory was 103.7MB in the beginning and 92.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1923.04ms. Allocated memory is still 132.1MB. Free memory was 92.5MB in the beginning and 92.2MB in the end (delta: 294.3kB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. * Witness Printer took 34.94ms. Allocated memory is still 132.1MB. Free memory was 92.2MB in the beginning and 89.3MB in the end (delta: 3.0MB). 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: 19]: 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, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 161 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 132 mSDsluCounter, 614 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 379 mSDsCounter, 139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 552 IncrementalHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 139 mSolverCounterUnsat, 235 mSDtfsCounter, 552 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 66 PreInvPairs, 103 NumberOfFragments, 152 HoareAnnotationTreeSize, 66 FomulaSimplifications, 364 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 250 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 486 SizeOfPredicates, 1 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 60/67 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: 32]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: (0 <= t && 1 <= tagbuf_len) && t <= tagbuf_len - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-13 15:36:27,038 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