./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.2024-06-19_11-23-25.files/mutex-meet-nonrel/18_read_write_lock.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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.2024-06-19_11-23-25.files/mutex-meet-nonrel/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-eb4cb34-m [2024-06-21 20:02:31,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:02:31,646 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:02:31,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:02:31,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:02:31,664 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:02:31,665 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:02:31,665 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:02:31,666 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:02:31,666 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:02:31,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:02:31,667 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:02:31,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:02:31,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:02:31,668 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:02:31,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:02:31,668 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:02:31,669 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:02:31,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:02:31,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:02:31,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:02:31,672 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:02:31,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:02:31,673 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:02:31,673 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:02:31,673 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:02:31,673 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:02:31,673 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:02:31,674 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:02:31,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:02:31,675 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:02:31,675 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:02:31,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:31,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:02:31,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:02:31,676 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:02:31,676 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:02:31,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:02:31,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:02:31,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:02:31,676 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:02:31,677 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:02:31,677 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:02:31,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:02:31,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:02:31,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:02:31,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:02:31,902 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:02:31,902 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:02:31,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/18_read_write_lock.yml/witness.yml [2024-06-21 20:02:32,039 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:02:32,039 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:02:32,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2024-06-21 20:02:33,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:02:33,428 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:02:33,429 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2024-06-21 20:02:33,445 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56915ba9f/be4db4fa378c47309bf7810526d5e6db/FLAGce686bba0 [2024-06-21 20:02:33,462 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56915ba9f/be4db4fa378c47309bf7810526d5e6db [2024-06-21 20:02:33,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:02:33,465 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:02:33,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:33,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:02:33,470 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:02:33,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:32" (1/2) ... [2024-06-21 20:02:33,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46186a9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:33, skipping insertion in model container [2024-06-21 20:02:33,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:32" (1/2) ... [2024-06-21 20:02:33,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2066c370 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:33, skipping insertion in model container [2024-06-21 20:02:33,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:33" (2/2) ... [2024-06-21 20:02:33,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46186a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33, skipping insertion in model container [2024-06-21 20:02:33,475 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:33" (2/2) ... [2024-06-21 20:02:33,475 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:02:33,498 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:02:33,500 INFO L97 edCorrectnessWitness]: Location invariant before [L751-L751] (((! multithreaded || (x == 0 || x == 3)) && (! multithreaded || (y == 0 || y == 3))) && (! multithreaded || ((w == 0 || w == 1) && (y == 0 || y == 3)))) && (! multithreaded || (w == 0 || w == 1)) [2024-06-21 20:02:33,500 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:02:33,501 INFO L106 edCorrectnessWitness]: ghost_update [L750-L750] multithreaded = 1; [2024-06-21 20:02:33,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:02:33,832 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:33,840 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:02:33,910 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:33,968 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:02:33,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33 WrapperNode [2024-06-21 20:02:33,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:33,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:33,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:02:33,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:02:33,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:33,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,002 INFO L138 Inliner]: procedures = 172, calls = 28, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 79 [2024-06-21 20:02:34,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:34,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:02:34,003 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:02:34,003 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:02:34,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,017 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,033 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]. [2024-06-21 20:02:34,033 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:02:34,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:02:34,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:02:34,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:02:34,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (1/1) ... [2024-06-21 20:02:34,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:34,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:02:34,070 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) [2024-06-21 20:02:34,076 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 [2024-06-21 20:02:34,100 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-21 20:02:34,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-21 20:02:34,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:02:34,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:02:34,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:02:34,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:02:34,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:02:34,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:02:34,102 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:02:34,196 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:02:34,197 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:02:34,304 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:02:34,305 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:02:34,383 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:02:34,383 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:02:34,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:34 BoogieIcfgContainer [2024-06-21 20:02:34,384 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:02:34,386 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:02:34,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:02:34,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:02:34,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:32" (1/4) ... [2024-06-21 20:02:34,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe4a762 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:34, skipping insertion in model container [2024-06-21 20:02:34,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:02:33" (2/4) ... [2024-06-21 20:02:34,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe4a762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:34, skipping insertion in model container [2024-06-21 20:02:34,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:33" (3/4) ... [2024-06-21 20:02:34,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe4a762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:34, skipping insertion in model container [2024-06-21 20:02:34,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:34" (4/4) ... [2024-06-21 20:02:34,393 INFO L112 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2024-06-21 20:02:34,406 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:02:34,407 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-21 20:02:34,407 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:02:34,428 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:02:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 46 flow [2024-06-21 20:02:34,477 INFO L124 PetriNetUnfolderBase]: 0/20 cut-off events. [2024-06-21 20:02:34,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 0/20 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. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:02:34,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 46 flow [2024-06-21 20:02:34,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 10 transitions, 23 flow [2024-06-21 20:02:34,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:02:34,494 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;@3337d4a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:02:34,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-06-21 20:02:34,497 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:02:34,497 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:02:34,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:34,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:34,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:02:34,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-21 20:02:34,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 204920128, now seen corresponding path program 1 times [2024-06-21 20:02:34,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67304882] [2024-06-21 20:02:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:35,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:35,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67304882] [2024-06-21 20:02:35,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67304882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:35,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:35,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:02:35,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865636918] [2024-06-21 20:02:35,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:35,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:02:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:02:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:02:35,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 21 [2024-06-21 20:02:35,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 10 transitions, 23 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-06-21 20:02:35,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:35,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 21 [2024-06-21 20:02:35,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:35,148 INFO L124 PetriNetUnfolderBase]: 5/21 cut-off events. [2024-06-21 20:02:35,148 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-21 20:02:35,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 21 events. 5/21 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 2 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 33. Up to 15 conditions per place. [2024-06-21 20:02:35,151 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 6 selfloop transitions, 2 changer transitions 0/11 dead transitions. [2024-06-21 20:02:35,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 11 transitions, 41 flow [2024-06-21 20:02:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:02:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:02:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2024-06-21 20:02:35,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:02:35,163 INFO L175 Difference]: Start difference. First operand has 14 places, 10 transitions, 23 flow. Second operand 3 states and 36 transitions. [2024-06-21 20:02:35,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 11 transitions, 41 flow [2024-06-21 20:02:35,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:35,166 INFO L231 Difference]: Finished difference. Result has 16 places, 10 transitions, 30 flow [2024-06-21 20:02:35,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2024-06-21 20:02:35,170 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2024-06-21 20:02:35,171 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 30 flow [2024-06-21 20:02:35,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-06-21 20:02:35,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:35,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:35,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:02:35,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-21 20:02:35,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:35,174 INFO L85 PathProgramCache]: Analyzing trace with hash -640232033, now seen corresponding path program 1 times [2024-06-21 20:02:35,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:35,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342808083] [2024-06-21 20:02:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:35,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:35,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342808083] [2024-06-21 20:02:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342808083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:35,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:35,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:02:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570478607] [2024-06-21 20:02:35,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:35,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:02:35,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:02:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:02:35,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 21 [2024-06-21 20:02:35,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 10 transitions, 30 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2024-06-21 20:02:35,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:35,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 21 [2024-06-21 20:02:35,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:35,347 INFO L124 PetriNetUnfolderBase]: 6/22 cut-off events. [2024-06-21 20:02:35,347 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 20:02:35,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 22 events. 6/22 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. 1/22 useless extension candidates. Maximal degree in co-relation 44. Up to 15 conditions per place. [2024-06-21 20:02:35,348 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 7 selfloop transitions, 3 changer transitions 0/12 dead transitions. [2024-06-21 20:02:35,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 12 transitions, 54 flow [2024-06-21 20:02:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-06-21 20:02:35,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-21 20:02:35,351 INFO L175 Difference]: Start difference. First operand has 16 places, 10 transitions, 30 flow. Second operand 4 states and 43 transitions. [2024-06-21 20:02:35,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 12 transitions, 54 flow [2024-06-21 20:02:35,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 12 transitions, 50 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:35,352 INFO L231 Difference]: Finished difference. Result has 18 places, 10 transitions, 36 flow [2024-06-21 20:02:35,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=10} [2024-06-21 20:02:35,353 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, 4 predicate places. [2024-06-21 20:02:35,354 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 10 transitions, 36 flow [2024-06-21 20:02:35,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2024-06-21 20:02:35,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:35,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:02:35,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-21 20:02:35,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:35,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1627644161, now seen corresponding path program 1 times [2024-06-21 20:02:35,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:35,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409001730] [2024-06-21 20:02:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:35,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409001730] [2024-06-21 20:02:35,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409001730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:35,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:35,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193219265] [2024-06-21 20:02:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:35,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 21 [2024-06-21 20:02:35,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 10 transitions, 36 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-21 20:02:35,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:35,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 21 [2024-06-21 20:02:35,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:35,496 INFO L124 PetriNetUnfolderBase]: 5/20 cut-off events. [2024-06-21 20:02:35,497 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-06-21 20:02:35,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 20 events. 5/20 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. 1/20 useless extension candidates. Maximal degree in co-relation 45. Up to 12 conditions per place. [2024-06-21 20:02:35,497 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 6 selfloop transitions, 4 changer transitions 0/12 dead transitions. [2024-06-21 20:02:35,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 12 transitions, 60 flow [2024-06-21 20:02:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-06-21 20:02:35,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 20:02:35,500 INFO L175 Difference]: Start difference. First operand has 18 places, 10 transitions, 36 flow. Second operand 5 states and 51 transitions. [2024-06-21 20:02:35,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 12 transitions, 60 flow [2024-06-21 20:02:35,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 54 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:35,501 INFO L231 Difference]: Finished difference. Result has 20 places, 10 transitions, 42 flow [2024-06-21 20:02:35,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=42, PETRI_PLACES=20, PETRI_TRANSITIONS=10} [2024-06-21 20:02:35,502 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, 6 predicate places. [2024-06-21 20:02:35,503 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 10 transitions, 42 flow [2024-06-21 20:02:35,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-21 20:02:35,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:35,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:35,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:02:35,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-21 20:02:35,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1053054526, now seen corresponding path program 1 times [2024-06-21 20:02:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67959860] [2024-06-21 20:02:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:35,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:35,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:35,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67959860] [2024-06-21 20:02:35,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67959860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:35,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:35,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:35,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681716525] [2024-06-21 20:02:35,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:35,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:35,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:35,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:35,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:35,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 21 [2024-06-21 20:02:35,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 10 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2024-06-21 20:02:35,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:35,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 21 [2024-06-21 20:02:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:35,628 INFO L124 PetriNetUnfolderBase]: 4/17 cut-off events. [2024-06-21 20:02:35,629 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-21 20:02:35,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 17 events. 4/17 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. 2/18 useless extension candidates. Maximal degree in co-relation 39. Up to 6 conditions per place. [2024-06-21 20:02:35,629 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2024-06-21 20:02:35,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 11 transitions, 56 flow [2024-06-21 20:02:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-06-21 20:02:35,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:02:35,635 INFO L175 Difference]: Start difference. First operand has 20 places, 10 transitions, 42 flow. Second operand 5 states and 50 transitions. [2024-06-21 20:02:35,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 11 transitions, 56 flow [2024-06-21 20:02:35,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 42 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:35,636 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2024-06-21 20:02:35,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2024-06-21 20:02:35,637 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2024-06-21 20:02:35,637 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2024-06-21 20:02:35,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2024-06-21 20:02:35,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 2 remaining) [2024-06-21 20:02:35,640 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2024-06-21 20:02:35,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:02:35,640 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-06-21 20:02:35,643 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 20:02:35,644 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 20:02:35,649 INFO L507 ceAbstractionStarter]: Automizer considered 1 witness invariants [2024-06-21 20:02:35,649 INFO L508 ceAbstractionStarter]: WitnessConsidered=1 [2024-06-21 20:02:35,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 08:02:35 BasicIcfg [2024-06-21 20:02:35,650 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 20:02:35,653 INFO L158 Benchmark]: Toolchain (without parser) took 2186.07ms. Allocated memory is still 172.0MB. Free memory was 95.3MB in the beginning and 76.0MB in the end (delta: 19.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2024-06-21 20:02:35,653 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:02:35,655 INFO L158 Benchmark]: CDTParser took 0.63ms. Allocated memory is still 172.0MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:02:35,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 502.89ms. Allocated memory is still 172.0MB. Free memory was 95.1MB in the beginning and 140.2MB in the end (delta: -45.1MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2024-06-21 20:02:35,656 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.21ms. Allocated memory is still 172.0MB. Free memory was 140.2MB in the beginning and 138.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:02:35,656 INFO L158 Benchmark]: Boogie Preprocessor took 41.84ms. Allocated memory is still 172.0MB. Free memory was 138.0MB in the beginning and 136.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:02:35,656 INFO L158 Benchmark]: RCFGBuilder took 338.77ms. Allocated memory is still 172.0MB. Free memory was 136.5MB in the beginning and 114.9MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-21 20:02:35,658 INFO L158 Benchmark]: TraceAbstraction took 1264.14ms. Allocated memory is still 172.0MB. Free memory was 114.1MB in the beginning and 76.0MB in the end (delta: 38.1MB). Peak memory consumption was 34.5MB. Max. memory is 16.1GB. [2024-06-21 20:02:35,662 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 0.15ms. Allocated memory is still 117.4MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.63ms. Allocated memory is still 172.0MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 502.89ms. Allocated memory is still 172.0MB. Free memory was 95.1MB in the beginning and 140.2MB in the end (delta: -45.1MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.21ms. Allocated memory is still 172.0MB. Free memory was 140.2MB in the beginning and 138.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.84ms. Allocated memory is still 172.0MB. Free memory was 138.0MB in the beginning and 136.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 338.77ms. Allocated memory is still 172.0MB. Free memory was 136.5MB in the beginning and 114.9MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 1264.14ms. Allocated memory is still 172.0MB. Free memory was 114.1MB in the beginning and 76.0MB in the end (delta: 38.1MB). Peak memory consumption was 34.5MB. 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, 29 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: 1.2s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 20 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 112 IncrementalHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 10 mSDtfsCounter, 112 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 159 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! [2024-06-21 20:02:35,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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