./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/13-privatized_27-multiple-protecting2_true.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/13-privatized_27-multiple-protecting2_true.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/goblint-regression/13-privatized_27-multiple-protecting2_true.i ./goblint.2024-05-21_14-57-05.files/protection/13-privatized_27-multiple-protecting2_true.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-cde23df-m [2024-06-14 11:42:24,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:42:24,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:42:24,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:42:24,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:42:24,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:42:24,717 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:42:24,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:42:24,718 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:42:24,721 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:42:24,721 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:42:24,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:42:24,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:42:24,723 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:42:24,723 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:42:24,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:42:24,724 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:42:24,724 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:42:24,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:42:24,725 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:42:24,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:42:24,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:42:24,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:42:24,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:42:24,726 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:42:24,726 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:42:24,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:42:24,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:42:24,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:42:24,727 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:42:24,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:42:24,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:42:24,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:42:24,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:42:24,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:42:24,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:42:24,729 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:42:24,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:42:24,730 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:42:24,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:42:24,730 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:42:24,730 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:42:24,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:42:24,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:42:24,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:42:24,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:42:24,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:42:24,960 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:42:24,961 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:42:24,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_27-multiple-protecting2_true.i [2024-06-14 11:42:25,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:42:26,224 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:42:26,224 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_27-multiple-protecting2_true.i [2024-06-14 11:42:26,233 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af0125121/cd6b7b8741bb4c3da4131873bbd741b9/FLAG4bb1675b1 [2024-06-14 11:42:26,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af0125121/cd6b7b8741bb4c3da4131873bbd741b9 [2024-06-14 11:42:26,244 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:42:26,245 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:42:26,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/13-privatized_27-multiple-protecting2_true.yml/witness.yml [2024-06-14 11:42:26,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:42:26,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:42:26,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:42:26,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:42:26,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:42:26,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:42:26" (1/2) ... [2024-06-14 11:42:26,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0f3ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:42:26, skipping insertion in model container [2024-06-14 11:42:26,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:42:26" (1/2) ... [2024-06-14 11:42:26,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5707f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:42:26, skipping insertion in model container [2024-06-14 11:42:26,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:42:26" (2/2) ... [2024-06-14 11:42:26,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0f3ca7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26, skipping insertion in model container [2024-06-14 11:42:26,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:42:26" (2/2) ... [2024-06-14 11:42:26,337 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:42:26,406 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:42:26,407 INFO L97 edCorrectnessWitness]: Location invariant before [L711-L711] (! multithreaded || 0 <= g2) && (! multithreaded || 0 <= g1) [2024-06-14 11:42:26,407 INFO L97 edCorrectnessWitness]: Location invariant before [L712-L712] (! multithreaded || 0 <= g2) && (! multithreaded || 0 <= g1) [2024-06-14 11:42:26,408 INFO L103 edCorrectnessWitness]: ghost_variable __global_lock_locked = 0 [2024-06-14 11:42:26,408 INFO L103 edCorrectnessWitness]: ghost_variable mutex2_locked = 0 [2024-06-14 11:42:26,408 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:42:26,409 INFO L103 edCorrectnessWitness]: ghost_variable mutex1_locked = 0 [2024-06-14 11:42:26,409 INFO L106 edCorrectnessWitness]: ghost_update [L722-L722] __global_lock_locked = 0; [2024-06-14 11:42:26,409 INFO L106 edCorrectnessWitness]: ghost_update [L701-L701] __global_lock_locked = 1; [2024-06-14 11:42:26,409 INFO L106 edCorrectnessWitness]: ghost_update [L713-L713] __global_lock_locked = 1; [2024-06-14 11:42:26,409 INFO L106 edCorrectnessWitness]: ghost_update [L690-L690] __global_lock_locked = 1; [2024-06-14 11:42:26,409 INFO L106 edCorrectnessWitness]: ghost_update [L717-L717] __global_lock_locked = 1; [2024-06-14 11:42:26,409 INFO L106 edCorrectnessWitness]: ghost_update [L715-L715] __global_lock_locked = 0; [2024-06-14 11:42:26,410 INFO L106 edCorrectnessWitness]: ghost_update [L687-L687] __global_lock_locked = 1; [2024-06-14 11:42:26,410 INFO L106 edCorrectnessWitness]: ghost_update [L686-L686] mutex1_locked = 1; [2024-06-14 11:42:26,410 INFO L106 edCorrectnessWitness]: ghost_update [L724-L724] __global_lock_locked = 1; [2024-06-14 11:42:26,410 INFO L106 edCorrectnessWitness]: ghost_update [L710-L710] multithreaded = 1; [2024-06-14 11:42:26,410 INFO L106 edCorrectnessWitness]: ghost_update [L726-L726] __global_lock_locked = 0; [2024-06-14 11:42:26,410 INFO L106 edCorrectnessWitness]: ghost_update [L697-L697] mutex2_locked = 1; [2024-06-14 11:42:26,410 INFO L106 edCorrectnessWitness]: ghost_update [L723-L723] mutex2_locked = 0; [2024-06-14 11:42:26,411 INFO L106 edCorrectnessWitness]: ghost_update [L719-L719] __global_lock_locked = 0; [2024-06-14 11:42:26,411 INFO L106 edCorrectnessWitness]: ghost_update [L716-L716] mutex2_locked = 1; [2024-06-14 11:42:26,411 INFO L106 edCorrectnessWitness]: ghost_update [L700-L700] __global_lock_locked = 0; [2024-06-14 11:42:26,411 INFO L106 edCorrectnessWitness]: ghost_update [L692-L692] __global_lock_locked = 0; [2024-06-14 11:42:26,411 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] __global_lock_locked = 1; [2024-06-14 11:42:26,412 INFO L106 edCorrectnessWitness]: ghost_update [L693-L693] mutex1_locked = 0; [2024-06-14 11:42:26,412 INFO L106 edCorrectnessWitness]: ghost_update [L703-L703] __global_lock_locked = 0; [2024-06-14 11:42:26,412 INFO L106 edCorrectnessWitness]: ghost_update [L704-L704] mutex2_locked = 0; [2024-06-14 11:42:26,412 INFO L106 edCorrectnessWitness]: ghost_update [L727-L727] mutex1_locked = 0; [2024-06-14 11:42:26,412 INFO L106 edCorrectnessWitness]: ghost_update [L698-L698] __global_lock_locked = 1; [2024-06-14 11:42:26,412 INFO L106 edCorrectnessWitness]: ghost_update [L689-L689] __global_lock_locked = 0; [2024-06-14 11:42:26,412 INFO L106 edCorrectnessWitness]: ghost_update [L712-L712] mutex1_locked = 1; [2024-06-14 11:42:26,449 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:42:26,749 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:42:26,773 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:42:26,878 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:42:26,906 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:42:26,907 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26 WrapperNode [2024-06-14 11:42:26,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:42:26,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:42:26,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:42:26,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:42:26,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,938 INFO L138 Inliner]: procedures = 163, calls = 55, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 137 [2024-06-14 11:42:26,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:42:26,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:42:26,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:42:26,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:42:26,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,949 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,958 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 5, 5, 5]. 29 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5]. The 0 writes are split as follows [0, 0, 0, 0]. [2024-06-14 11:42:26,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,968 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:42:26,968 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:42:26,969 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:42:26,969 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:42:26,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (1/1) ... [2024-06-14 11:42:26,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:42:26,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:42:26,989 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) [2024-06-14 11:42:27,006 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 [2024-06-14 11:42:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-06-14 11:42:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-06-14 11:42:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-14 11:42:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:42:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-06-14 11:42:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-06-14 11:42:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:42:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 11:42:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-14 11:42:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-14 11:42:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-14 11:42:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:42:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:42:27,018 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:42:27,109 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:42:27,111 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:42:27,310 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:42:27,311 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:42:27,475 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:42:27,475 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:42:27,476 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:42:27 BoogieIcfgContainer [2024-06-14 11:42:27,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:42:27,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:42:27,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:42:27,482 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:42:27,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:42:26" (1/4) ... [2024-06-14 11:42:27,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542f502b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:42:27, skipping insertion in model container [2024-06-14 11:42:27,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:42:26" (2/4) ... [2024-06-14 11:42:27,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542f502b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:42:27, skipping insertion in model container [2024-06-14 11:42:27,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:42:26" (3/4) ... [2024-06-14 11:42:27,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542f502b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:42:27, skipping insertion in model container [2024-06-14 11:42:27,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:42:27" (4/4) ... [2024-06-14 11:42:27,489 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_27-multiple-protecting2_true.i [2024-06-14 11:42:27,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:42:27,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-14 11:42:27,502 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:42:27,537 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-14 11:42:27,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 66 transitions, 146 flow [2024-06-14 11:42:27,606 INFO L124 PetriNetUnfolderBase]: 0/64 cut-off events. [2024-06-14 11:42:27,606 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-14 11:42:27,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 0/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2024-06-14 11:42:27,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 66 transitions, 146 flow [2024-06-14 11:42:27,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 36 transitions, 78 flow [2024-06-14 11:42:27,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:42:27,629 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;@28889c70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:42:27,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-14 11:42:27,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:42:27,634 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 11:42:27,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:42:27,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:27,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:42:27,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:27,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1407902652, now seen corresponding path program 1 times [2024-06-14 11:42:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:27,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614671801] [2024-06-14 11:42:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:27,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:27,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:27,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614671801] [2024-06-14 11:42:27,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614671801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:27,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:27,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:42:27,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286193989] [2024-06-14 11:42:27,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:42:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:42:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:42:27,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:27,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-06-14 11:42:27,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:27,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:27,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:28,106 INFO L124 PetriNetUnfolderBase]: 456/868 cut-off events. [2024-06-14 11:42:28,106 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-14 11:42:28,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 868 events. 456/868 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4164 event pairs, 239 based on Foata normal form. 9/855 useless extension candidates. Maximal degree in co-relation 1667. Up to 736 conditions per place. [2024-06-14 11:42:28,116 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 35 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-06-14 11:42:28,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 177 flow [2024-06-14 11:42:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:42:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:42:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-14 11:42:28,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-14 11:42:28,128 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 78 flow. Second operand 3 states and 97 transitions. [2024-06-14 11:42:28,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 177 flow [2024-06-14 11:42:28,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:42:28,134 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 97 flow [2024-06-14 11:42:28,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-06-14 11:42:28,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-06-14 11:42:28,140 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 97 flow [2024-06-14 11:42:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-06-14 11:42:28,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:28,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:42:28,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:28,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1721980601, now seen corresponding path program 1 times [2024-06-14 11:42:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081066515] [2024-06-14 11:42:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:28,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:28,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:28,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081066515] [2024-06-14 11:42:28,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081066515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:28,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:28,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:42:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237221930] [2024-06-14 11:42:28,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:28,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:42:28,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:28,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:42:28,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:42:28,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:28,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-06-14 11:42:28,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:28,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:28,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:28,391 INFO L124 PetriNetUnfolderBase]: 435/837 cut-off events. [2024-06-14 11:42:28,391 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2024-06-14 11:42:28,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 837 events. 435/837 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3978 event pairs, 161 based on Foata normal form. 12/834 useless extension candidates. Maximal degree in co-relation 1758. Up to 646 conditions per place. [2024-06-14 11:42:28,395 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 43 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-14 11:42:28,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 235 flow [2024-06-14 11:42:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:42:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:42:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-14 11:42:28,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:42:28,400 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 97 flow. Second operand 4 states and 126 transitions. [2024-06-14 11:42:28,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 235 flow [2024-06-14 11:42:28,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:42:28,402 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2024-06-14 11:42:28,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 11:42:28,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-14 11:42:28,403 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2024-06-14 11:42:28,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-06-14 11:42:28,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:28,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:28,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:42:28,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:28,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1528966906, now seen corresponding path program 1 times [2024-06-14 11:42:28,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:28,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827804777] [2024-06-14 11:42:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:28,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:28,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:28,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827804777] [2024-06-14 11:42:28,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827804777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:28,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:28,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:42:28,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961877899] [2024-06-14 11:42:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:28,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:42:28,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:28,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:42:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:42:28,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:28,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2024-06-14 11:42:28,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:28,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:28,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:28,635 INFO L124 PetriNetUnfolderBase]: 417/807 cut-off events. [2024-06-14 11:42:28,635 INFO L125 PetriNetUnfolderBase]: For 349/349 co-relation queries the response was YES. [2024-06-14 11:42:28,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1846 conditions, 807 events. 417/807 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3775 event pairs, 194 based on Foata normal form. 9/804 useless extension candidates. Maximal degree in co-relation 1829. Up to 637 conditions per place. [2024-06-14 11:42:28,639 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-14 11:42:28,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 249 flow [2024-06-14 11:42:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:42:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:42:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-14 11:42:28,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:42:28,643 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 4 states and 122 transitions. [2024-06-14 11:42:28,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 249 flow [2024-06-14 11:42:28,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 240 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 11:42:28,646 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 137 flow [2024-06-14 11:42:28,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 11:42:28,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-14 11:42:28,647 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 137 flow [2024-06-14 11:42:28,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2024-06-14 11:42:28,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:28,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:28,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:42:28,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:28,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash -534523131, now seen corresponding path program 1 times [2024-06-14 11:42:28,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:28,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681356456] [2024-06-14 11:42:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:28,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:28,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:28,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681356456] [2024-06-14 11:42:28,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681356456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:28,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:28,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:42:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843063679] [2024-06-14 11:42:28,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:28,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:42:28,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:42:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:42:28,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:28,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2024-06-14 11:42:28,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:28,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:28,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:28,841 INFO L124 PetriNetUnfolderBase]: 393/760 cut-off events. [2024-06-14 11:42:28,841 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2024-06-14 11:42:28,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1826 conditions, 760 events. 393/760 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3519 event pairs, 73 based on Foata normal form. 16/765 useless extension candidates. Maximal degree in co-relation 1808. Up to 503 conditions per place. [2024-06-14 11:42:28,844 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 47 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-06-14 11:42:28,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 281 flow [2024-06-14 11:42:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:42:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:42:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-14 11:42:28,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2024-06-14 11:42:28,846 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 137 flow. Second operand 5 states and 148 transitions. [2024-06-14 11:42:28,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 281 flow [2024-06-14 11:42:28,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 272 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 11:42:28,847 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 138 flow [2024-06-14 11:42:28,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-06-14 11:42:28,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 11:42:28,848 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 138 flow [2024-06-14 11:42:28,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2024-06-14 11:42:28,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:28,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:28,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:42:28,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:28,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1850721288, now seen corresponding path program 1 times [2024-06-14 11:42:28,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:28,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56595318] [2024-06-14 11:42:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:28,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:28,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:28,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56595318] [2024-06-14 11:42:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56595318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:28,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:28,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:42:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101911823] [2024-06-14 11:42:28,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:28,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:42:28,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:42:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:42:28,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:28,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-06-14 11:42:28,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:28,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:28,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:29,007 INFO L124 PetriNetUnfolderBase]: 372/727 cut-off events. [2024-06-14 11:42:29,008 INFO L125 PetriNetUnfolderBase]: For 717/717 co-relation queries the response was YES. [2024-06-14 11:42:29,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 727 events. 372/727 cut-off events. For 717/717 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3265 event pairs, 169 based on Foata normal form. 12/731 useless extension candidates. Maximal degree in co-relation 1766. Up to 512 conditions per place. [2024-06-14 11:42:29,011 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 44 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2024-06-14 11:42:29,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 274 flow [2024-06-14 11:42:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:42:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:42:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-14 11:42:29,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-14 11:42:29,012 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 138 flow. Second operand 5 states and 144 transitions. [2024-06-14 11:42:29,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 274 flow [2024-06-14 11:42:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 260 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:42:29,015 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 140 flow [2024-06-14 11:42:29,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-06-14 11:42:29,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-14 11:42:29,017 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 140 flow [2024-06-14 11:42:29,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-06-14 11:42:29,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:29,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:29,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:42:29,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:29,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash 365925577, now seen corresponding path program 1 times [2024-06-14 11:42:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:29,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312231465] [2024-06-14 11:42:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:29,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:29,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312231465] [2024-06-14 11:42:29,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312231465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:29,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:29,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:42:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090325946] [2024-06-14 11:42:29,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:29,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:42:29,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:29,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:42:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:42:29,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:29,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-06-14 11:42:29,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:29,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:29,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:29,235 INFO L124 PetriNetUnfolderBase]: 399/775 cut-off events. [2024-06-14 11:42:29,235 INFO L125 PetriNetUnfolderBase]: For 967/967 co-relation queries the response was YES. [2024-06-14 11:42:29,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 775 events. 399/775 cut-off events. For 967/967 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3598 event pairs, 142 based on Foata normal form. 9/776 useless extension candidates. Maximal degree in co-relation 1918. Up to 552 conditions per place. [2024-06-14 11:42:29,239 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 49 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-06-14 11:42:29,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 306 flow [2024-06-14 11:42:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:42:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:42:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-14 11:42:29,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:42:29,240 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 140 flow. Second operand 5 states and 150 transitions. [2024-06-14 11:42:29,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 306 flow [2024-06-14 11:42:29,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:42:29,242 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 157 flow [2024-06-14 11:42:29,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2024-06-14 11:42:29,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-14 11:42:29,243 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 157 flow [2024-06-14 11:42:29,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-06-14 11:42:29,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:29,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:42:29,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:29,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash 365913487, now seen corresponding path program 2 times [2024-06-14 11:42:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:29,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139481051] [2024-06-14 11:42:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:29,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139481051] [2024-06-14 11:42:29,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139481051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:29,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:29,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:42:29,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293407151] [2024-06-14 11:42:29,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:29,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:42:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:42:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:42:29,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:29,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-06-14 11:42:29,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:29,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:29,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:29,423 INFO L124 PetriNetUnfolderBase]: 381/748 cut-off events. [2024-06-14 11:42:29,424 INFO L125 PetriNetUnfolderBase]: For 1129/1129 co-relation queries the response was YES. [2024-06-14 11:42:29,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 748 events. 381/748 cut-off events. For 1129/1129 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3465 event pairs, 154 based on Foata normal form. 9/749 useless extension candidates. Maximal degree in co-relation 1898. Up to 543 conditions per place. [2024-06-14 11:42:29,428 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 48 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-06-14 11:42:29,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 317 flow [2024-06-14 11:42:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:42:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:42:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-14 11:42:29,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-14 11:42:29,430 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 157 flow. Second operand 5 states and 147 transitions. [2024-06-14 11:42:29,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 317 flow [2024-06-14 11:42:29,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 302 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:42:29,432 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 177 flow [2024-06-14 11:42:29,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2024-06-14 11:42:29,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 11:42:29,433 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 177 flow [2024-06-14 11:42:29,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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) [2024-06-14 11:42:29,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:29,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:29,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:42:29,434 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:29,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash -516434613, now seen corresponding path program 1 times [2024-06-14 11:42:29,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:29,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8022341] [2024-06-14 11:42:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:29,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:29,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:29,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8022341] [2024-06-14 11:42:29,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8022341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:29,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:29,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:42:29,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811821332] [2024-06-14 11:42:29,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:29,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:42:29,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:42:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:42:29,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:29,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:29,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:29,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:29,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:29,628 INFO L124 PetriNetUnfolderBase]: 411/804 cut-off events. [2024-06-14 11:42:29,629 INFO L125 PetriNetUnfolderBase]: For 1633/1633 co-relation queries the response was YES. [2024-06-14 11:42:29,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2121 conditions, 804 events. 411/804 cut-off events. For 1633/1633 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3816 event pairs, 64 based on Foata normal form. 12/808 useless extension candidates. Maximal degree in co-relation 2099. Up to 371 conditions per place. [2024-06-14 11:42:29,632 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 56 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-14 11:42:29,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 385 flow [2024-06-14 11:42:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:42:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:42:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-14 11:42:29,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:42:29,634 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 177 flow. Second operand 6 states and 179 transitions. [2024-06-14 11:42:29,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 385 flow [2024-06-14 11:42:29,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 366 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:42:29,637 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 203 flow [2024-06-14 11:42:29,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=203, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-14 11:42:29,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-14 11:42:29,639 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 203 flow [2024-06-14 11:42:29,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:29,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:29,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:29,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:42:29,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:29,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash -516450423, now seen corresponding path program 2 times [2024-06-14 11:42:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134809312] [2024-06-14 11:42:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:29,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134809312] [2024-06-14 11:42:29,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134809312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:29,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:29,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:42:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896208322] [2024-06-14 11:42:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:42:29,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:42:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:42:29,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:29,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 203 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:29,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:29,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:29,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:29,832 INFO L124 PetriNetUnfolderBase]: 390/773 cut-off events. [2024-06-14 11:42:29,833 INFO L125 PetriNetUnfolderBase]: For 1802/1802 co-relation queries the response was YES. [2024-06-14 11:42:29,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 773 events. 390/773 cut-off events. For 1802/1802 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3682 event pairs, 103 based on Foata normal form. 12/775 useless extension candidates. Maximal degree in co-relation 2032. Up to 410 conditions per place. [2024-06-14 11:42:29,836 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 55 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-14 11:42:29,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 399 flow [2024-06-14 11:42:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:42:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:42:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-14 11:42:29,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:42:29,837 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 203 flow. Second operand 6 states and 179 transitions. [2024-06-14 11:42:29,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 399 flow [2024-06-14 11:42:29,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 380 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:29,840 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 216 flow [2024-06-14 11:42:29,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2024-06-14 11:42:29,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-14 11:42:29,841 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 216 flow [2024-06-14 11:42:29,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:29,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:29,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:29,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:42:29,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:29,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash -930602425, now seen corresponding path program 1 times [2024-06-14 11:42:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:29,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917580495] [2024-06-14 11:42:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:29,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:29,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917580495] [2024-06-14 11:42:29,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917580495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:29,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:29,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:42:29,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410786743] [2024-06-14 11:42:29,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:29,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:42:29,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:42:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:42:29,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:29,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:29,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:29,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:29,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:30,095 INFO L124 PetriNetUnfolderBase]: 420/835 cut-off events. [2024-06-14 11:42:30,095 INFO L125 PetriNetUnfolderBase]: For 1874/1874 co-relation queries the response was YES. [2024-06-14 11:42:30,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2226 conditions, 835 events. 420/835 cut-off events. For 1874/1874 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4059 event pairs, 147 based on Foata normal form. 12/839 useless extension candidates. Maximal degree in co-relation 2202. Up to 548 conditions per place. [2024-06-14 11:42:30,099 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 58 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2024-06-14 11:42:30,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 414 flow [2024-06-14 11:42:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:42:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:42:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-14 11:42:30,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:42:30,100 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 216 flow. Second operand 6 states and 176 transitions. [2024-06-14 11:42:30,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 414 flow [2024-06-14 11:42:30,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 392 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:30,103 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 224 flow [2024-06-14 11:42:30,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2024-06-14 11:42:30,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 11:42:30,104 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 224 flow [2024-06-14 11:42:30,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:30,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:30,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:30,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:42:30,104 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:30,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 446335313, now seen corresponding path program 2 times [2024-06-14 11:42:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:30,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164910585] [2024-06-14 11:42:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:30,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:30,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164910585] [2024-06-14 11:42:30,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164910585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:30,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:30,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:42:30,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444409374] [2024-06-14 11:42:30,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:30,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:42:30,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:42:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:42:30,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:30,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:30,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:30,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:30,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:30,299 INFO L124 PetriNetUnfolderBase]: 450/893 cut-off events. [2024-06-14 11:42:30,299 INFO L125 PetriNetUnfolderBase]: For 2276/2276 co-relation queries the response was YES. [2024-06-14 11:42:30,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 893 events. 450/893 cut-off events. For 2276/2276 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4488 event pairs, 109 based on Foata normal form. 12/897 useless extension candidates. Maximal degree in co-relation 2372. Up to 470 conditions per place. [2024-06-14 11:42:30,303 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 58 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 11:42:30,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 438 flow [2024-06-14 11:42:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:42:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:42:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-14 11:42:30,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:42:30,305 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 224 flow. Second operand 6 states and 179 transitions. [2024-06-14 11:42:30,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 438 flow [2024-06-14 11:42:30,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 418 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:30,310 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 251 flow [2024-06-14 11:42:30,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2024-06-14 11:42:30,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-14 11:42:30,311 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 251 flow [2024-06-14 11:42:30,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:30,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:30,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:30,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:42:30,311 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:30,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:30,312 INFO L85 PathProgramCache]: Analyzing trace with hash 446343683, now seen corresponding path program 3 times [2024-06-14 11:42:30,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:30,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781376422] [2024-06-14 11:42:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:30,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:30,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781376422] [2024-06-14 11:42:30,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781376422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:30,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:30,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:42:30,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224031877] [2024-06-14 11:42:30,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:30,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:42:30,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:42:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:42:30,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:30,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:30,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:30,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:30,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:30,517 INFO L124 PetriNetUnfolderBase]: 429/862 cut-off events. [2024-06-14 11:42:30,517 INFO L125 PetriNetUnfolderBase]: For 2213/2213 co-relation queries the response was YES. [2024-06-14 11:42:30,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2283 conditions, 862 events. 429/862 cut-off events. For 2213/2213 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4285 event pairs, 134 based on Foata normal form. 12/866 useless extension candidates. Maximal degree in co-relation 2257. Up to 439 conditions per place. [2024-06-14 11:42:30,521 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 56 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-14 11:42:30,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 451 flow [2024-06-14 11:42:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:42:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:42:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-14 11:42:30,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:42:30,523 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 251 flow. Second operand 6 states and 179 transitions. [2024-06-14 11:42:30,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 451 flow [2024-06-14 11:42:30,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 430 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:30,529 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 265 flow [2024-06-14 11:42:30,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2024-06-14 11:42:30,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-14 11:42:30,530 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 265 flow [2024-06-14 11:42:30,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2024-06-14 11:42:30,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:30,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:30,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:42:30,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:30,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash 754471369, now seen corresponding path program 1 times [2024-06-14 11:42:30,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:30,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840744515] [2024-06-14 11:42:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:30,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:30,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840744515] [2024-06-14 11:42:30,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840744515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:30,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:30,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:42:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318848877] [2024-06-14 11:42:30,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:30,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:42:30,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:30,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:42:30,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:42:30,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:30,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:30,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:30,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:30,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:30,762 INFO L124 PetriNetUnfolderBase]: 461/930 cut-off events. [2024-06-14 11:42:30,763 INFO L125 PetriNetUnfolderBase]: For 2519/2519 co-relation queries the response was YES. [2024-06-14 11:42:30,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2460 conditions, 930 events. 461/930 cut-off events. For 2519/2519 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4716 event pairs, 70 based on Foata normal form. 16/938 useless extension candidates. Maximal degree in co-relation 2433. Up to 282 conditions per place. [2024-06-14 11:42:30,766 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 47 selfloop transitions, 12 changer transitions 18/85 dead transitions. [2024-06-14 11:42:30,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 497 flow [2024-06-14 11:42:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:42:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:42:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-14 11:42:30,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-14 11:42:30,768 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 265 flow. Second operand 7 states and 205 transitions. [2024-06-14 11:42:30,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 497 flow [2024-06-14 11:42:30,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 472 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:30,772 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 246 flow [2024-06-14 11:42:30,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2024-06-14 11:42:30,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-14 11:42:30,773 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 246 flow [2024-06-14 11:42:30,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:30,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:30,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:30,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:42:30,774 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:30,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1418593403, now seen corresponding path program 2 times [2024-06-14 11:42:30,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:30,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954472373] [2024-06-14 11:42:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:30,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:30,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954472373] [2024-06-14 11:42:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954472373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:30,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:30,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:42:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832681306] [2024-06-14 11:42:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:42:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:42:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:42:30,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:30,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:30,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:30,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:30,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:31,006 INFO L124 PetriNetUnfolderBase]: 383/779 cut-off events. [2024-06-14 11:42:31,006 INFO L125 PetriNetUnfolderBase]: For 2589/2589 co-relation queries the response was YES. [2024-06-14 11:42:31,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 779 events. 383/779 cut-off events. For 2589/2589 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3754 event pairs, 64 based on Foata normal form. 16/787 useless extension candidates. Maximal degree in co-relation 2074. Up to 282 conditions per place. [2024-06-14 11:42:31,009 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 46 selfloop transitions, 11 changer transitions 9/74 dead transitions. [2024-06-14 11:42:31,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 438 flow [2024-06-14 11:42:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:42:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:42:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 11:42:31,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-14 11:42:31,010 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 246 flow. Second operand 7 states and 195 transitions. [2024-06-14 11:42:31,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 438 flow [2024-06-14 11:42:31,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 386 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 11:42:31,014 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 202 flow [2024-06-14 11:42:31,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2024-06-14 11:42:31,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-14 11:42:31,015 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 202 flow [2024-06-14 11:42:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:31,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:31,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:42:31,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:31,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1418605493, now seen corresponding path program 3 times [2024-06-14 11:42:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:31,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458089636] [2024-06-14 11:42:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:31,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:31,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458089636] [2024-06-14 11:42:31,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458089636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:31,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:31,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:42:31,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880993599] [2024-06-14 11:42:31,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:31,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:42:31,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:31,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:42:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:42:31,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:31,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:31,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:31,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:31,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:31,206 INFO L124 PetriNetUnfolderBase]: 341/705 cut-off events. [2024-06-14 11:42:31,207 INFO L125 PetriNetUnfolderBase]: For 1448/1448 co-relation queries the response was YES. [2024-06-14 11:42:31,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1807 conditions, 705 events. 341/705 cut-off events. For 1448/1448 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3311 event pairs, 88 based on Foata normal form. 16/709 useless extension candidates. Maximal degree in co-relation 1784. Up to 279 conditions per place. [2024-06-14 11:42:31,209 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 36 selfloop transitions, 5 changer transitions 26/75 dead transitions. [2024-06-14 11:42:31,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 404 flow [2024-06-14 11:42:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:42:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:42:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-14 11:42:31,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-14 11:42:31,210 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 202 flow. Second operand 7 states and 200 transitions. [2024-06-14 11:42:31,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 404 flow [2024-06-14 11:42:31,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 366 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:42:31,212 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 143 flow [2024-06-14 11:42:31,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=143, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2024-06-14 11:42:31,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-14 11:42:31,213 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 143 flow [2024-06-14 11:42:31,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:31,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:31,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:31,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:42:31,213 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:31,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:31,214 INFO L85 PathProgramCache]: Analyzing trace with hash -822943857, now seen corresponding path program 4 times [2024-06-14 11:42:31,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:31,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489726279] [2024-06-14 11:42:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:31,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:31,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:31,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489726279] [2024-06-14 11:42:31,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489726279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:31,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:31,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:42:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705312238] [2024-06-14 11:42:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:31,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:42:31,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:31,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:42:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:42:31,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:31,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 143 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:31,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:31,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:31,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:31,383 INFO L124 PetriNetUnfolderBase]: 254/528 cut-off events. [2024-06-14 11:42:31,383 INFO L125 PetriNetUnfolderBase]: For 831/831 co-relation queries the response was YES. [2024-06-14 11:42:31,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 528 events. 254/528 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2233 event pairs, 70 based on Foata normal form. 16/532 useless extension candidates. Maximal degree in co-relation 1252. Up to 165 conditions per place. [2024-06-14 11:42:31,385 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 32 selfloop transitions, 4 changer transitions 19/63 dead transitions. [2024-06-14 11:42:31,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 303 flow [2024-06-14 11:42:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:42:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:42:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 11:42:31,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 11:42:31,386 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 143 flow. Second operand 7 states and 189 transitions. [2024-06-14 11:42:31,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 303 flow [2024-06-14 11:42:31,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 278 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:42:31,388 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 110 flow [2024-06-14 11:42:31,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=110, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2024-06-14 11:42:31,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 11:42:31,388 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 110 flow [2024-06-14 11:42:31,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:31,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:31,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:31,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:42:31,389 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 11:42:31,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1395774389, now seen corresponding path program 5 times [2024-06-14 11:42:31,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:31,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371416223] [2024-06-14 11:42:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:31,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:31,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:31,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371416223] [2024-06-14 11:42:31,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371416223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:31,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:31,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:42:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829633080] [2024-06-14 11:42:31,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:31,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:42:31,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:42:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:42:31,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 66 [2024-06-14 11:42:31,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:31,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:31,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 66 [2024-06-14 11:42:31,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:31,539 INFO L124 PetriNetUnfolderBase]: 132/288 cut-off events. [2024-06-14 11:42:31,539 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2024-06-14 11:42:31,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 288 events. 132/288 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 955 event pairs, 22 based on Foata normal form. 16/296 useless extension candidates. Maximal degree in co-relation 625. Up to 72 conditions per place. [2024-06-14 11:42:31,540 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2024-06-14 11:42:31,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 202 flow [2024-06-14 11:42:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:42:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:42:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:42:31,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-14 11:42:31,541 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 110 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:42:31,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 202 flow [2024-06-14 11:42:31,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 182 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 11:42:31,542 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2024-06-14 11:42:31,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2024-06-14 11:42:31,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-14 11:42:31,543 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2024-06-14 11:42:31,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-14 11:42:31,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-14 11:42:31,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-14 11:42:31,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-14 11:42:31,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-14 11:42:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:42:31,546 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 1, 1, 1, 1, 1] [2024-06-14 11:42:31,548 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 11:42:31,548 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 11:42:31,551 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-14 11:42:31,551 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-14 11:42:31,552 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 11:42:31 BasicIcfg [2024-06-14 11:42:31,552 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 11:42:31,552 INFO L158 Benchmark]: Toolchain (without parser) took 5224.89ms. Allocated memory was 132.1MB in the beginning and 270.5MB in the end (delta: 138.4MB). Free memory was 71.8MB in the beginning and 129.7MB in the end (delta: -57.9MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. [2024-06-14 11:42:31,552 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 94.2MB in the end (delta: 82.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:42:31,552 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 132.1MB. Free memory is still 77.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:42:31,553 INFO L158 Benchmark]: CACSL2BoogieTranslator took 580.39ms. Allocated memory was 132.1MB in the beginning and 167.8MB in the end (delta: 35.7MB). Free memory was 71.6MB in the beginning and 129.5MB in the end (delta: -57.9MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. [2024-06-14 11:42:31,553 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.01ms. Allocated memory is still 167.8MB. Free memory was 129.5MB in the beginning and 127.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:42:31,553 INFO L158 Benchmark]: Boogie Preprocessor took 28.58ms. Allocated memory is still 167.8MB. Free memory was 127.4MB in the beginning and 125.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:42:31,553 INFO L158 Benchmark]: RCFGBuilder took 508.32ms. Allocated memory is still 167.8MB. Free memory was 125.3MB in the beginning and 77.0MB in the end (delta: 48.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2024-06-14 11:42:31,554 INFO L158 Benchmark]: TraceAbstraction took 4072.07ms. Allocated memory was 167.8MB in the beginning and 270.5MB in the end (delta: 102.8MB). Free memory was 76.0MB in the beginning and 129.7MB in the end (delta: -53.8MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. [2024-06-14 11:42:31,555 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 132.1MB. Free memory was 94.3MB in the beginning and 94.2MB in the end (delta: 82.1kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 132.1MB. Free memory is still 77.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 580.39ms. Allocated memory was 132.1MB in the beginning and 167.8MB in the end (delta: 35.7MB). Free memory was 71.6MB in the beginning and 129.5MB in the end (delta: -57.9MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.01ms. Allocated memory is still 167.8MB. Free memory was 129.5MB in the beginning and 127.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.58ms. Allocated memory is still 167.8MB. Free memory was 127.4MB in the beginning and 125.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 508.32ms. Allocated memory is still 167.8MB. Free memory was 125.3MB in the beginning and 77.0MB in the end (delta: 48.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * TraceAbstraction took 4072.07ms. Allocated memory was 167.8MB in the beginning and 270.5MB in the end (delta: 102.8MB). Free memory was 76.0MB in the beginning and 129.7MB in the end (delta: -53.8MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 711]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 712]: 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 5 procedures, 97 locations, 4 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: 4.0s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 477 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 437 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2414 IncrementalHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 19 mSDtfsCounter, 2414 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265occurred in iteration=12, InterpolantAutomatonStates: 96, 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, 1.2s InterpolantComputationTime, 352 NumberOfCodeBlocks, 352 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 2345 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 11:42:31,579 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