./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/18_read_write_lock.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i ./goblint.2024-05-21_14-57-05.files/protection/18_read_write_lock.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 18:36:25,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:36:25,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:36:25,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:36:25,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:36:25,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:36:25,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:36:25,177 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:36:25,177 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:36:25,180 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:36:25,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:36:25,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:36:25,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:36:25,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:36:25,183 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:36:25,183 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:36:25,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:36:25,183 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:36:25,183 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:36:25,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:36:25,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:36:25,184 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:36:25,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:36:25,185 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:36:25,185 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:36:25,185 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:36:25,185 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:36:25,185 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:36:25,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:36:25,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:36:25,187 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:36:25,187 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:36:25,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:36:25,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:36:25,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:36:25,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:36:25,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:36:25,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:36:25,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:36:25,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:36:25,191 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:36:25,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:36:25,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:36:25,192 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:36:25,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:36:25,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:36:25,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:36:25,471 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:36:25,471 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:36:25,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/18_read_write_lock.yml/witness.yml [2024-06-03 18:36:25,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:36:25,548 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:36:25,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2024-06-03 18:36:26,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:36:26,934 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:36:26,934 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2024-06-03 18:36:26,949 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf642417b/f298a9a019a94969bc3d7ad84edaaeba/FLAG2515dabfa [2024-06-03 18:36:26,960 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf642417b/f298a9a019a94969bc3d7ad84edaaeba [2024-06-03 18:36:26,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:36:26,961 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:36:26,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:36:26,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:36:26,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:36:26,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:36:25" (1/2) ... [2024-06-03 18:36:26,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21311392 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:36:26, skipping insertion in model container [2024-06-03 18:36:26,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:36:25" (1/2) ... [2024-06-03 18:36:26,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@614f8ebf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:36:26, skipping insertion in model container [2024-06-03 18:36:26,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:36:26" (2/2) ... [2024-06-03 18:36:26,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21311392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:26, skipping insertion in model container [2024-06-03 18:36:26,969 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:36:26" (2/2) ... [2024-06-03 18:36:26,969 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:36:26,990 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:36:26,991 INFO L97 edCorrectnessWitness]: Location invariant before [L751-L751] ((! multithreaded || ((0 <= w && w <= 1) && (w == 0 || w == 1))) && (! multithreaded || ((((0 <= x && x <= 3) && x <= 127) && x % 3 == 0) && (x == 0 || x == 3)))) && (! multithreaded || ((((0 <= y && y <= 3) && y <= 127) && y % 3 == 0) && (y == 0 || y == 3))) [2024-06-03 18:36:26,991 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:36:26,992 INFO L106 edCorrectnessWitness]: ghost_update [L750-L750] multithreaded = 1; [2024-06-03 18:36:27,030 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:36:27,326 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:36:27,337 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:36:27,436 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:36:27,483 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:36:27,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27 WrapperNode [2024-06-03 18:36:27,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:36:27,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:36:27,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:36:27,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:36:27,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,556 INFO L138 Inliner]: procedures = 172, calls = 28, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 79 [2024-06-03 18:36:27,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:36:27,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:36:27,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:36:27,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:36:27,565 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,567 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,576 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 18:36:27,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,580 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,583 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:36:27,589 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:36:27,589 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:36:27,589 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:36:27,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (1/1) ... [2024-06-03 18:36:27,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:36:27,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:36:27,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 18:36:27,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 18:36:27,701 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-03 18:36:27,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-03 18:36:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:36:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:36:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:36:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:36:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:36:27,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:36:27,714 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:36:27,845 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:36:27,847 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:36:27,959 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:36:27,959 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:36:28,038 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:36:28,039 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:36:28,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:36:28 BoogieIcfgContainer [2024-06-03 18:36:28,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:36:28,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:36:28,041 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:36:28,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:36:28,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:36:25" (1/4) ... [2024-06-03 18:36:28,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29059bbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:36:28, skipping insertion in model container [2024-06-03 18:36:28,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:36:26" (2/4) ... [2024-06-03 18:36:28,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29059bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:36:28, skipping insertion in model container [2024-06-03 18:36:28,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:36:27" (3/4) ... [2024-06-03 18:36:28,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29059bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:36:28, skipping insertion in model container [2024-06-03 18:36:28,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:36:28" (4/4) ... [2024-06-03 18:36:28,046 INFO L112 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2024-06-03 18:36:28,059 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:36:28,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-03 18:36:28,060 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:36:28,082 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:36:28,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 48 flow [2024-06-03 18:36:28,131 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2024-06-03 18:36:28,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:36:28,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 21 events. 0/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 18:36:28,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 48 flow [2024-06-03 18:36:28,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 11 transitions, 25 flow [2024-06-03 18:36:28,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:36:28,147 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a4c288a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:36:28,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-06-03 18:36:28,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:36:28,151 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 18:36:28,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:36:28,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:28,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:36:28,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-03 18:36:28,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2053989090, now seen corresponding path program 1 times [2024-06-03 18:36:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:28,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101739197] [2024-06-03 18:36:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:28,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101739197] [2024-06-03 18:36:28,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101739197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:28,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:28,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:36:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502501244] [2024-06-03 18:36:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:28,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:36:28,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:36:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:36:28,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 22 [2024-06-03 18:36:28,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 11 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-06-03 18:36:28,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:28,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 22 [2024-06-03 18:36:28,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:28,740 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2024-06-03 18:36:28,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:36:28,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 22 events. 5/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 2 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 33. Up to 15 conditions per place. [2024-06-03 18:36:28,743 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 8 selfloop transitions, 2 changer transitions 0/12 dead transitions. [2024-06-03 18:36:28,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 12 transitions, 47 flow [2024-06-03 18:36:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:36:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:36:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2024-06-03 18:36:28,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-03 18:36:28,755 INFO L175 Difference]: Start difference. First operand has 15 places, 11 transitions, 25 flow. Second operand 3 states and 35 transitions. [2024-06-03 18:36:28,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 12 transitions, 47 flow [2024-06-03 18:36:28,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 12 transitions, 46 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:36:28,759 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2024-06-03 18:36:28,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2024-06-03 18:36:28,763 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 2 predicate places. [2024-06-03 18:36:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2024-06-03 18:36:28,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-06-03 18:36:28,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:28,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:28,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:36:28,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-03 18:36:28,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1801420095, now seen corresponding path program 1 times [2024-06-03 18:36:28,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:28,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059351994] [2024-06-03 18:36:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:28,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:28,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059351994] [2024-06-03 18:36:28,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059351994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:28,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:28,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:36:28,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111396130] [2024-06-03 18:36:28,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:28,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:36:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:36:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:36:29,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2024-06-03 18:36:29,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 11 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2024-06-03 18:36:29,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:29,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2024-06-03 18:36:29,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:29,030 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2024-06-03 18:36:29,030 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-03 18:36:29,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 23 events. 6/23 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 2 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 44. Up to 15 conditions per place. [2024-06-03 18:36:29,031 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 9 selfloop transitions, 3 changer transitions 0/13 dead transitions. [2024-06-03 18:36:29,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 13 transitions, 60 flow [2024-06-03 18:36:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:36:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:36:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-06-03 18:36:29,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-03 18:36:29,033 INFO L175 Difference]: Start difference. First operand has 17 places, 11 transitions, 32 flow. Second operand 4 states and 41 transitions. [2024-06-03 18:36:29,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 13 transitions, 60 flow [2024-06-03 18:36:29,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 56 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 18:36:29,035 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 38 flow [2024-06-03 18:36:29,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=38, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2024-06-03 18:36:29,036 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 4 predicate places. [2024-06-03 18:36:29,036 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 38 flow [2024-06-03 18:36:29,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2024-06-03 18:36:29,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:29,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:29,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:36:29,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-03 18:36:29,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash -9447393, now seen corresponding path program 1 times [2024-06-03 18:36:29,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:29,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479492298] [2024-06-03 18:36:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:29,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:29,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479492298] [2024-06-03 18:36:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479492298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:29,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:36:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481898552] [2024-06-03 18:36:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:29,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:36:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:36:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:36:29,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2024-06-03 18:36:29,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 11 transitions, 38 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2024-06-03 18:36:29,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:29,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2024-06-03 18:36:29,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:29,235 INFO L124 PetriNetUnfolderBase]: 5/21 cut-off events. [2024-06-03 18:36:29,235 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-06-03 18:36:29,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 21 events. 5/21 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 3 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 45. Up to 14 conditions per place. [2024-06-03 18:36:29,236 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 8 selfloop transitions, 4 changer transitions 0/13 dead transitions. [2024-06-03 18:36:29,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 66 flow [2024-06-03 18:36:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:36:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:36:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-06-03 18:36:29,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-03 18:36:29,238 INFO L175 Difference]: Start difference. First operand has 19 places, 11 transitions, 38 flow. Second operand 5 states and 48 transitions. [2024-06-03 18:36:29,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 66 flow [2024-06-03 18:36:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 60 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:36:29,240 INFO L231 Difference]: Finished difference. Result has 21 places, 11 transitions, 44 flow [2024-06-03 18:36:29,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=44, PETRI_PLACES=21, PETRI_TRANSITIONS=11} [2024-06-03 18:36:29,242 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 6 predicate places. [2024-06-03 18:36:29,242 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 44 flow [2024-06-03 18:36:29,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2024-06-03 18:36:29,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:36:29,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:36:29,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:36:29,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-03 18:36:29,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:36:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash -263285148, now seen corresponding path program 1 times [2024-06-03 18:36:29,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:36:29,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728914627] [2024-06-03 18:36:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:36:29,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:36:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:36:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:36:29,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:36:29,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728914627] [2024-06-03 18:36:29,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728914627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:36:29,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:36:29,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:36:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328849549] [2024-06-03 18:36:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:36:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:36:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:36:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:36:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:36:29,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2024-06-03 18:36:29,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2024-06-03 18:36:29,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:36:29,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2024-06-03 18:36:29,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:36:29,547 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-06-03 18:36:29,548 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-03 18:36:29,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 18 events. 4/18 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 1 based on Foata normal form. 2/19 useless extension candidates. Maximal degree in co-relation 39. Up to 8 conditions per place. [2024-06-03 18:36:29,548 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2024-06-03 18:36:29,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 12 transitions, 62 flow [2024-06-03 18:36:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:36:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:36:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-06-03 18:36:29,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-03 18:36:29,552 INFO L175 Difference]: Start difference. First operand has 21 places, 11 transitions, 44 flow. Second operand 5 states and 47 transitions. [2024-06-03 18:36:29,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 12 transitions, 62 flow [2024-06-03 18:36:29,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 12 transitions, 48 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 18:36:29,553 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2024-06-03 18:36:29,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2024-06-03 18:36:29,554 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 2 predicate places. [2024-06-03 18:36:29,555 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2024-06-03 18:36:29,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2024-06-03 18:36:29,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 2 remaining) [2024-06-03 18:36:29,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2024-06-03 18:36:29,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:36:29,561 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-06-03 18:36:29,564 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 18:36:29,564 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 18:36:29,567 INFO L507 ceAbstractionStarter]: Automizer considered 1 witness invariants [2024-06-03 18:36:29,567 INFO L508 ceAbstractionStarter]: WitnessConsidered=1 [2024-06-03 18:36:29,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 06:36:29 BasicIcfg [2024-06-03 18:36:29,568 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 18:36:29,570 INFO L158 Benchmark]: Toolchain (without parser) took 2607.54ms. Allocated memory was 182.5MB in the beginning and 251.7MB in the end (delta: 69.2MB). Free memory was 145.7MB in the beginning and 202.8MB in the end (delta: -57.1MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2024-06-03 18:36:29,585 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 182.5MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:29,586 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 182.5MB. Free memory is still 148.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:29,586 INFO L158 Benchmark]: CACSL2BoogieTranslator took 526.60ms. Allocated memory is still 182.5MB. Free memory was 145.7MB in the beginning and 121.3MB in the end (delta: 24.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:29,586 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.26ms. Allocated memory is still 182.5MB. Free memory was 121.3MB in the beginning and 119.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:29,586 INFO L158 Benchmark]: Boogie Preprocessor took 30.90ms. Allocated memory is still 182.5MB. Free memory was 119.3MB in the beginning and 117.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:36:29,587 INFO L158 Benchmark]: RCFGBuilder took 450.60ms. Allocated memory is still 182.5MB. Free memory was 117.2MB in the beginning and 126.9MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-06-03 18:36:29,590 INFO L158 Benchmark]: TraceAbstraction took 1528.11ms. Allocated memory was 182.5MB in the beginning and 251.7MB in the end (delta: 69.2MB). Free memory was 125.8MB in the beginning and 202.8MB in the end (delta: -77.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:36:29,591 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 182.5MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 182.5MB. Free memory is still 148.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 526.60ms. Allocated memory is still 182.5MB. Free memory was 145.7MB in the beginning and 121.3MB in the end (delta: 24.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.26ms. Allocated memory is still 182.5MB. Free memory was 121.3MB in the beginning and 119.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.90ms. Allocated memory is still 182.5MB. Free memory was 119.3MB in the beginning and 117.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 450.60ms. Allocated memory is still 182.5MB. Free memory was 117.2MB in the beginning and 126.9MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1528.11ms. Allocated memory was 182.5MB in the beginning and 251.7MB in the end (delta: 69.2MB). Free memory was 125.8MB in the beginning and 202.8MB in the end (delta: -77.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 751]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 30 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.5s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 141 IncrementalHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 19 mSDtfsCounter, 141 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 182 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-03 18:36:29,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE