./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 13967880 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-1396788-m [2024-02-02 16:16:28,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 16:16:28,189 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 16:16:28,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 16:16:28,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 16:16:28,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 16:16:28,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 16:16:28,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 16:16:28,207 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 16:16:28,208 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 16:16:28,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 16:16:28,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 16:16:28,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 16:16:28,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 16:16:28,209 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 16:16:28,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 16:16:28,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 16:16:28,210 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 16:16:28,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 16:16:28,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 16:16:28,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 16:16:28,212 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 16:16:28,212 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 16:16:28,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 16:16:28,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 16:16:28,213 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 16:16:28,213 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 16:16:28,213 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 16:16:28,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 16:16:28,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 16:16:28,214 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 16:16:28,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 16:16:28,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:16:28,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 16:16:28,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 16:16:28,215 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 16:16:28,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 16:16:28,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 16:16:28,215 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 16:16:28,216 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 16:16:28,216 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 16:16:28,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 16:16:28,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 16:16:28,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 16:16:28,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 16:16:28,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 16:16:28,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 16:16:28,393 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 16:16:28,394 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 16:16:28,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.yml/witness.yml [2024-02-02 16:16:28,586 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 16:16:28,600 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 16:16:28,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-02-02 16:16:29,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 16:16:30,024 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 16:16:30,025 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-02-02 16:16:30,039 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cfd7850f/53245aa54003408fb3c2b118c7bcc728/FLAG983cdcc0b [2024-02-02 16:16:30,052 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cfd7850f/53245aa54003408fb3c2b118c7bcc728 [2024-02-02 16:16:30,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 16:16:30,054 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 16:16:30,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 16:16:30,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 16:16:30,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 16:16:30,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:16:28" (1/2) ... [2024-02-02 16:16:30,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74804c61 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:30, skipping insertion in model container [2024-02-02 16:16:30,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:16:28" (1/2) ... [2024-02-02 16:16:30,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5efb185d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:16:30, skipping insertion in model container [2024-02-02 16:16:30,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:16:30" (2/2) ... [2024-02-02 16:16:30,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74804c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30, skipping insertion in model container [2024-02-02 16:16:30,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:16:30" (2/2) ... [2024-02-02 16:16:30,069 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 16:16:30,106 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 16:16:30,107 INFO L101 nessWitnessExtractor]: Location invariant before [L696-L696] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-02-02 16:16:30,108 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-02 16:16:30,108 INFO L101 nessWitnessExtractor]: Location invariant after [L704-L704] (unsigned long )arg == 0UL [2024-02-02 16:16:30,108 INFO L101 nessWitnessExtractor]: Location invariant before [L695-L695] ((unsigned int )count == 3U) && (COND == (_Bool)0 || COND == (_Bool)1) [2024-02-02 16:16:30,108 INFO L101 nessWitnessExtractor]: Location invariant before [L700-L700] COND == (_Bool)0 [2024-02-02 16:16:30,108 INFO L101 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-02-02 16:16:30,108 INFO L101 nessWitnessExtractor]: Location invariant before [L697-L697] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-02-02 16:16:30,108 INFO L101 nessWitnessExtractor]: Loop invariant at [L699-L699] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-02 16:16:30,109 INFO L101 nessWitnessExtractor]: Location invariant before [L694-L694] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-02 16:16:30,109 INFO L101 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-02-02 16:16:30,109 INFO L101 nessWitnessExtractor]: Location invariant before [L701-L701] COND == (_Bool)1 [2024-02-02 16:16:30,109 INFO L101 nessWitnessExtractor]: Location invariant before [L703-L703] (unsigned long )arg == 0UL [2024-02-02 16:16:30,149 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-02 16:16:30,437 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i[30842,30855] [2024-02-02 16:16:30,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:16:30,462 INFO L204 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 [2024-02-02 16:16:30,515 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i[30842,30855] Start Parsing Local [2024-02-02 16:16:30,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:16:30,546 INFO L208 MainTranslator]: Completed translation [2024-02-02 16:16:30,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30 WrapperNode [2024-02-02 16:16:30,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 16:16:30,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 16:16:30,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 16:16:30,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 16:16:30,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,592 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-02-02 16:16:30,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 16:16:30,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 16:16:30,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 16:16:30,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 16:16:30,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,604 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,617 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 10, 1]. 56 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 10, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-02-02 16:16:30,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,618 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,623 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,630 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 16:16:30,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 16:16:30,630 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 16:16:30,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 16:16:30,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (1/1) ... [2024-02-02 16:16:30,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:16:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:16:30,687 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) [2024-02-02 16:16:30,690 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 [2024-02-02 16:16:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-02 16:16:30,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-02 16:16:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 16:16:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 16:16:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 16:16:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 16:16:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 16:16:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 16:16:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 16:16:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 16:16:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 16:16:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 16:16:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 16:16:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 16:16:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 16:16:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 16:16:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 16:16:30,735 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 16:16:30,854 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 16:16:30,856 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 16:16:31,043 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 16:16:31,043 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 16:16:31,265 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 16:16:31,265 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-02 16:16:31,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:16:31 BoogieIcfgContainer [2024-02-02 16:16:31,267 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 16:16:31,270 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 16:16:31,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 16:16:31,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 16:16:31,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:16:28" (1/4) ... [2024-02-02 16:16:31,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6a22e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 04:16:31, skipping insertion in model container [2024-02-02 16:16:31,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 04:16:30" (2/4) ... [2024-02-02 16:16:31,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6a22e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 04:16:31, skipping insertion in model container [2024-02-02 16:16:31,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:16:30" (3/4) ... [2024-02-02 16:16:31,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6a22e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 04:16:31, skipping insertion in model container [2024-02-02 16:16:31,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:16:31" (4/4) ... [2024-02-02 16:16:31,293 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2024-02-02 16:16:31,326 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 16:16:31,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-02-02 16:16:31,326 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 16:16:31,372 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 16:16:31,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 44 transitions, 92 flow [2024-02-02 16:16:31,430 INFO L124 PetriNetUnfolderBase]: 4/46 cut-off events. [2024-02-02 16:16:31,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 16:16:31,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 46 events. 4/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 72 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 41. Up to 3 conditions per place. [2024-02-02 16:16:31,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 44 transitions, 92 flow [2024-02-02 16:16:31,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 44 transitions, 92 flow [2024-02-02 16:16:31,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 16:16:31,453 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;@3816c8f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 16:16:31,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-02-02 16:16:31,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 16:16:31,458 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-02 16:16:31,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 16:16:31,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:31,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 16:16:31,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-02 16:16:31,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:31,463 INFO L85 PathProgramCache]: Analyzing trace with hash 236594894, now seen corresponding path program 1 times [2024-02-02 16:16:31,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:31,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052135350] [2024-02-02 16:16:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:31,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:31,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052135350] [2024-02-02 16:16:31,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052135350] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:31,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:31,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:31,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718250359] [2024-02-02 16:16:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:31,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:31,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:31,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 44 [2024-02-02 16:16:31,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 16:16:31,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:31,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 44 [2024-02-02 16:16:31,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:31,930 INFO L124 PetriNetUnfolderBase]: 22/115 cut-off events. [2024-02-02 16:16:31,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 16:16:31,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 115 events. 22/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 422 event pairs, 0 based on Foata normal form. 12/106 useless extension candidates. Maximal degree in co-relation 159. Up to 46 conditions per place. [2024-02-02 16:16:31,934 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 15 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-02-02 16:16:31,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 116 flow [2024-02-02 16:16:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-02-02 16:16:31,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-02-02 16:16:31,945 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 4 states and 114 transitions. [2024-02-02 16:16:31,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 116 flow [2024-02-02 16:16:31,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 16:16:31,948 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 80 flow [2024-02-02 16:16:31,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-02-02 16:16:31,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-02-02 16:16:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 80 flow [2024-02-02 16:16:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 16:16:31,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:31,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-02 16:16:31,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 16:16:31,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-02 16:16:31,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1255523799, now seen corresponding path program 1 times [2024-02-02 16:16:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420605910] [2024-02-02 16:16:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:31,984 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 16:16:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:32,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 16:16:32,035 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 16:16:32,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-02-02 16:16:32,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 25 remaining) [2024-02-02 16:16:32,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 25 remaining) [2024-02-02 16:16:32,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 25 remaining) [2024-02-02 16:16:32,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 25 remaining) [2024-02-02 16:16:32,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 25 remaining) [2024-02-02 16:16:32,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 25 remaining) [2024-02-02 16:16:32,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 25 remaining) [2024-02-02 16:16:32,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 25 remaining) [2024-02-02 16:16:32,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 25 remaining) [2024-02-02 16:16:32,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 25 remaining) [2024-02-02 16:16:32,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 25 remaining) [2024-02-02 16:16:32,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 25 remaining) [2024-02-02 16:16:32,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 25 remaining) [2024-02-02 16:16:32,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 25 remaining) [2024-02-02 16:16:32,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 25 remaining) [2024-02-02 16:16:32,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 25 remaining) [2024-02-02 16:16:32,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 25 remaining) [2024-02-02 16:16:32,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 25 remaining) [2024-02-02 16:16:32,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 25 remaining) [2024-02-02 16:16:32,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 25 remaining) [2024-02-02 16:16:32,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 25 remaining) [2024-02-02 16:16:32,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 25 remaining) [2024-02-02 16:16:32,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 25 remaining) [2024-02-02 16:16:32,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 25 remaining) [2024-02-02 16:16:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 16:16:32,057 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-02 16:16:32,060 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 16:16:32,060 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-02 16:16:32,087 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 16:16:32,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 176 flow [2024-02-02 16:16:32,111 INFO L124 PetriNetUnfolderBase]: 8/88 cut-off events. [2024-02-02 16:16:32,111 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 16:16:32,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 88 events. 8/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 79. Up to 3 conditions per place. [2024-02-02 16:16:32,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 176 flow [2024-02-02 16:16:32,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 176 flow [2024-02-02 16:16:32,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 16:16:32,115 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;@3816c8f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 16:16:32,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2024-02-02 16:16:32,116 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 16:16:32,116 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-02 16:16:32,116 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 16:16:32,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:32,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 16:16:32,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-02 16:16:32,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash 315839943, now seen corresponding path program 1 times [2024-02-02 16:16:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:32,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540239440] [2024-02-02 16:16:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:32,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:32,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:32,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540239440] [2024-02-02 16:16:32,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540239440] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:32,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:32,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436144567] [2024-02-02 16:16:32,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:32,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:32,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-02-02 16:16:32,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-02-02 16:16:32,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:32,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-02-02 16:16:32,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:32,414 INFO L124 PetriNetUnfolderBase]: 578/1733 cut-off events. [2024-02-02 16:16:32,415 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-02 16:16:32,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 1733 events. 578/1733 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13409 event pairs, 56 based on Foata normal form. 234/1585 useless extension candidates. Maximal degree in co-relation 2401. Up to 804 conditions per place. [2024-02-02 16:16:32,424 INFO L140 encePairwiseOnDemand]: 71/83 looper letters, 35 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-02-02 16:16:32,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 257 flow [2024-02-02 16:16:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-02-02 16:16:32,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228915662650602 [2024-02-02 16:16:32,427 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 176 flow. Second operand 4 states and 240 transitions. [2024-02-02 16:16:32,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 257 flow [2024-02-02 16:16:32,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 16:16:32,428 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 156 flow [2024-02-02 16:16:32,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-02-02 16:16:32,429 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-02-02 16:16:32,429 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 156 flow [2024-02-02 16:16:32,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-02-02 16:16:32,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:32,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:32,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 16:16:32,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-02 16:16:32,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1085225256, now seen corresponding path program 1 times [2024-02-02 16:16:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:32,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987703309] [2024-02-02 16:16:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:32,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:32,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:32,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987703309] [2024-02-02 16:16:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987703309] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:32,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:32,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 16:16:32,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767378237] [2024-02-02 16:16:32,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:32,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:16:32,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:32,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:16:32,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:16:32,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 83 [2024-02-02 16:16:32,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-02-02 16:16:32,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:32,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 83 [2024-02-02 16:16:32,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:32,697 INFO L124 PetriNetUnfolderBase]: 1076/2398 cut-off events. [2024-02-02 16:16:32,697 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-02-02 16:16:32,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4106 conditions, 2398 events. 1076/2398 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17080 event pairs, 335 based on Foata normal form. 162/2391 useless extension candidates. Maximal degree in co-relation 4090. Up to 1402 conditions per place. [2024-02-02 16:16:32,706 INFO L140 encePairwiseOnDemand]: 70/83 looper letters, 49 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-02-02 16:16:32,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 295 flow [2024-02-02 16:16:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:16:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:16:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-02-02 16:16:32,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6947791164658634 [2024-02-02 16:16:32,708 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 156 flow. Second operand 3 states and 173 transitions. [2024-02-02 16:16:32,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 295 flow [2024-02-02 16:16:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 86 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:32,710 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 190 flow [2024-02-02 16:16:32,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-02-02 16:16:32,711 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2024-02-02 16:16:32,711 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 190 flow [2024-02-02 16:16:32,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-02-02 16:16:32,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:32,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 16:16:32,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-02 16:16:32,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1151416436, now seen corresponding path program 1 times [2024-02-02 16:16:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:32,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906526815] [2024-02-02 16:16:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-02 16:16:32,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906526815] [2024-02-02 16:16:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906526815] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:32,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:32,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:32,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068819963] [2024-02-02 16:16:32,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:32,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:32,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-02-02 16:16:32,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2024-02-02 16:16:32,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:32,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-02-02 16:16:32,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:32,909 INFO L124 PetriNetUnfolderBase]: 539/1463 cut-off events. [2024-02-02 16:16:32,910 INFO L125 PetriNetUnfolderBase]: For 92/116 co-relation queries the response was YES. [2024-02-02 16:16:32,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 1463 events. 539/1463 cut-off events. For 92/116 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10679 event pairs, 21 based on Foata normal form. 60/1407 useless extension candidates. Maximal degree in co-relation 2513. Up to 737 conditions per place. [2024-02-02 16:16:32,918 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 46 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-02-02 16:16:32,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 330 flow [2024-02-02 16:16:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2024-02-02 16:16:32,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.713855421686747 [2024-02-02 16:16:32,920 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 190 flow. Second operand 4 states and 237 transitions. [2024-02-02 16:16:32,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 330 flow [2024-02-02 16:16:32,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:16:32,924 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 185 flow [2024-02-02 16:16:32,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-02-02 16:16:32,926 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-02-02 16:16:32,926 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 185 flow [2024-02-02 16:16:32,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2024-02-02 16:16:32,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:32,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-02 16:16:32,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 16:16:32,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-02 16:16:32,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1334201948, now seen corresponding path program 1 times [2024-02-02 16:16:32,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:32,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518175519] [2024-02-02 16:16:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:32,943 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 16:16:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:32,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 16:16:32,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 16:16:32,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (36 of 37 remaining) [2024-02-02 16:16:32,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 37 remaining) [2024-02-02 16:16:32,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 37 remaining) [2024-02-02 16:16:32,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 37 remaining) [2024-02-02 16:16:32,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 37 remaining) [2024-02-02 16:16:32,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 37 remaining) [2024-02-02 16:16:32,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 37 remaining) [2024-02-02 16:16:32,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 37 remaining) [2024-02-02 16:16:32,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 37 remaining) [2024-02-02 16:16:32,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 37 remaining) [2024-02-02 16:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 37 remaining) [2024-02-02 16:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 37 remaining) [2024-02-02 16:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (24 of 37 remaining) [2024-02-02 16:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 37 remaining) [2024-02-02 16:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 37 remaining) [2024-02-02 16:16:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 37 remaining) [2024-02-02 16:16:32,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 37 remaining) [2024-02-02 16:16:32,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 37 remaining) [2024-02-02 16:16:32,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 37 remaining) [2024-02-02 16:16:32,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 37 remaining) [2024-02-02 16:16:32,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 37 remaining) [2024-02-02 16:16:32,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 37 remaining) [2024-02-02 16:16:32,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 37 remaining) [2024-02-02 16:16:32,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 37 remaining) [2024-02-02 16:16:32,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 37 remaining) [2024-02-02 16:16:32,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 37 remaining) [2024-02-02 16:16:32,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 37 remaining) [2024-02-02 16:16:32,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 37 remaining) [2024-02-02 16:16:32,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 37 remaining) [2024-02-02 16:16:32,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 37 remaining) [2024-02-02 16:16:32,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 37 remaining) [2024-02-02 16:16:32,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 37 remaining) [2024-02-02 16:16:32,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 37 remaining) [2024-02-02 16:16:32,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 37 remaining) [2024-02-02 16:16:32,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 37 remaining) [2024-02-02 16:16:32,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 37 remaining) [2024-02-02 16:16:32,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 37 remaining) [2024-02-02 16:16:32,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 16:16:32,963 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-02-02 16:16:32,964 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 16:16:32,964 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-02 16:16:32,988 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 16:16:32,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 262 flow [2024-02-02 16:16:32,999 INFO L124 PetriNetUnfolderBase]: 12/130 cut-off events. [2024-02-02 16:16:32,999 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-02 16:16:33,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 130 events. 12/130 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 504 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 117. Up to 4 conditions per place. [2024-02-02 16:16:33,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 122 transitions, 262 flow [2024-02-02 16:16:33,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 122 transitions, 262 flow [2024-02-02 16:16:33,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 16:16:33,006 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;@3816c8f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 16:16:33,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2024-02-02 16:16:33,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 16:16:33,008 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-02 16:16:33,008 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-02 16:16:33,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:33,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 16:16:33,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-02 16:16:33,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:33,009 INFO L85 PathProgramCache]: Analyzing trace with hash 432301671, now seen corresponding path program 1 times [2024-02-02 16:16:33,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:33,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733867914] [2024-02-02 16:16:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:33,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:33,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733867914] [2024-02-02 16:16:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733867914] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:33,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080662956] [2024-02-02 16:16:33,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:33,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:33,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-02-02 16:16:33,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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) [2024-02-02 16:16:33,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:33,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-02-02 16:16:33,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:34,637 INFO L124 PetriNetUnfolderBase]: 9160/21040 cut-off events. [2024-02-02 16:16:34,638 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2024-02-02 16:16:34,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33337 conditions, 21040 events. 9160/21040 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 223550 event pairs, 780 based on Foata normal form. 3510/20364 useless extension candidates. Maximal degree in co-relation 27210. Up to 11134 conditions per place. [2024-02-02 16:16:34,791 INFO L140 encePairwiseOnDemand]: 107/122 looper letters, 55 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-02-02 16:16:34,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 402 flow [2024-02-02 16:16:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-02-02 16:16:34,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-02-02 16:16:34,797 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 262 flow. Second operand 4 states and 366 transitions. [2024-02-02 16:16:34,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 402 flow [2024-02-02 16:16:34,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 129 transitions, 398 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-02 16:16:34,800 INFO L231 Difference]: Finished difference. Result has 110 places, 106 transitions, 232 flow [2024-02-02 16:16:34,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2024-02-02 16:16:34,801 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2024-02-02 16:16:34,801 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 232 flow [2024-02-02 16:16:34,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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) [2024-02-02 16:16:34,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:34,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:34,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 16:16:34,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-02 16:16:34,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1973492660, now seen corresponding path program 1 times [2024-02-02 16:16:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:34,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561653059] [2024-02-02 16:16:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-02 16:16:34,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:34,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561653059] [2024-02-02 16:16:34,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561653059] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:34,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:34,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517692417] [2024-02-02 16:16:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:34,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:34,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-02-02 16:16:34,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2024-02-02 16:16:34,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:34,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-02-02 16:16:34,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:36,429 INFO L124 PetriNetUnfolderBase]: 9103/22029 cut-off events. [2024-02-02 16:16:36,429 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-02-02 16:16:36,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34204 conditions, 22029 events. 9103/22029 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 242012 event pairs, 2044 based on Foata normal form. 660/18131 useless extension candidates. Maximal degree in co-relation 34187. Up to 11028 conditions per place. [2024-02-02 16:16:36,580 INFO L140 encePairwiseOnDemand]: 117/122 looper letters, 64 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2024-02-02 16:16:36,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 427 flow [2024-02-02 16:16:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2024-02-02 16:16:36,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7315573770491803 [2024-02-02 16:16:36,582 INFO L175 Difference]: Start difference. First operand has 110 places, 106 transitions, 232 flow. Second operand 4 states and 357 transitions. [2024-02-02 16:16:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 427 flow [2024-02-02 16:16:36,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:36,584 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 227 flow [2024-02-02 16:16:36,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-02-02 16:16:36,585 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2024-02-02 16:16:36,585 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 227 flow [2024-02-02 16:16:36,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2024-02-02 16:16:36,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:36,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:36,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 16:16:36,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-02 16:16:36,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1907340430, now seen corresponding path program 1 times [2024-02-02 16:16:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:36,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615324932] [2024-02-02 16:16:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:36,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615324932] [2024-02-02 16:16:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615324932] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 16:16:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898545724] [2024-02-02 16:16:36,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:36,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:16:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:16:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:16:36,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 122 [2024-02-02 16:16:36,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2024-02-02 16:16:36,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:36,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 122 [2024-02-02 16:16:36,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:40,401 INFO L124 PetriNetUnfolderBase]: 32481/54102 cut-off events. [2024-02-02 16:16:40,416 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2024-02-02 16:16:40,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97614 conditions, 54102 events. 32481/54102 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 2795. Compared 487181 event pairs, 10368 based on Foata normal form. 1690/52264 useless extension candidates. Maximal degree in co-relation 97598. Up to 40618 conditions per place. [2024-02-02 16:16:41,047 INFO L140 encePairwiseOnDemand]: 103/122 looper letters, 72 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2024-02-02 16:16:41,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 125 transitions, 435 flow [2024-02-02 16:16:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:16:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:16:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2024-02-02 16:16:41,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994535519125683 [2024-02-02 16:16:41,048 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 227 flow. Second operand 3 states and 256 transitions. [2024-02-02 16:16:41,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 125 transitions, 435 flow [2024-02-02 16:16:41,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:41,054 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 278 flow [2024-02-02 16:16:41,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-02-02 16:16:41,055 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -8 predicate places. [2024-02-02 16:16:41,055 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 278 flow [2024-02-02 16:16:41,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2024-02-02 16:16:41,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:41,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:41,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 16:16:41,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-02 16:16:41,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:41,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1385600840, now seen corresponding path program 1 times [2024-02-02 16:16:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:41,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364886108] [2024-02-02 16:16:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-02 16:16:41,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364886108] [2024-02-02 16:16:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364886108] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:41,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:41,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:41,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145045450] [2024-02-02 16:16:41,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:41,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:41,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:41,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-02-02 16:16:41,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2024-02-02 16:16:41,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:41,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-02-02 16:16:41,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:42,725 INFO L124 PetriNetUnfolderBase]: 10888/22230 cut-off events. [2024-02-02 16:16:42,729 INFO L125 PetriNetUnfolderBase]: For 1821/2706 co-relation queries the response was YES. [2024-02-02 16:16:42,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40222 conditions, 22230 events. 10888/22230 cut-off events. For 1821/2706 co-relation queries the response was YES. Maximal size of possible extension queue 1277. Compared 223562 event pairs, 1266 based on Foata normal form. 774/20296 useless extension candidates. Maximal degree in co-relation 40204. Up to 10888 conditions per place. [2024-02-02 16:16:42,908 INFO L140 encePairwiseOnDemand]: 117/122 looper letters, 79 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2024-02-02 16:16:42,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 147 transitions, 542 flow [2024-02-02 16:16:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2024-02-02 16:16:42,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7479508196721312 [2024-02-02 16:16:42,915 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 278 flow. Second operand 4 states and 365 transitions. [2024-02-02 16:16:42,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 147 transitions, 542 flow [2024-02-02 16:16:42,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 534 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:16:42,923 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 272 flow [2024-02-02 16:16:42,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-02-02 16:16:42,926 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2024-02-02 16:16:42,926 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 272 flow [2024-02-02 16:16:42,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2024-02-02 16:16:42,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:42,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:16:42,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 16:16:42,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-02 16:16:42,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash 839080429, now seen corresponding path program 1 times [2024-02-02 16:16:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:42,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22659028] [2024-02-02 16:16:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:42,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22659028] [2024-02-02 16:16:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22659028] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:43,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:43,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873280905] [2024-02-02 16:16:43,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:43,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 122 [2024-02-02 16:16:43,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2024-02-02 16:16:43,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:43,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 122 [2024-02-02 16:16:43,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:16:49,925 INFO L124 PetriNetUnfolderBase]: 65263/104997 cut-off events. [2024-02-02 16:16:49,926 INFO L125 PetriNetUnfolderBase]: For 11423/11657 co-relation queries the response was YES. [2024-02-02 16:16:50,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203978 conditions, 104997 events. 65263/104997 cut-off events. For 11423/11657 co-relation queries the response was YES. Maximal size of possible extension queue 3113. Compared 917027 event pairs, 35569 based on Foata normal form. 10056/111189 useless extension candidates. Maximal degree in co-relation 203960. Up to 59310 conditions per place. [2024-02-02 16:16:50,819 INFO L140 encePairwiseOnDemand]: 91/122 looper letters, 99 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2024-02-02 16:16:50,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 149 transitions, 606 flow [2024-02-02 16:16:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:16:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:16:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 296 transitions. [2024-02-02 16:16:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6065573770491803 [2024-02-02 16:16:50,821 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 272 flow. Second operand 4 states and 296 transitions. [2024-02-02 16:16:50,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 149 transitions, 606 flow [2024-02-02 16:16:50,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 149 transitions, 601 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:16:50,829 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 404 flow [2024-02-02 16:16:50,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-02-02 16:16:50,830 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -15 predicate places. [2024-02-02 16:16:50,830 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 404 flow [2024-02-02 16:16:50,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2024-02-02 16:16:50,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:50,830 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-02 16:16:50,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 16:16:50,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-02 16:16:50,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash 3922440, now seen corresponding path program 1 times [2024-02-02 16:16:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:50,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058149412] [2024-02-02 16:16:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:50,842 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 16:16:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 16:16:50,850 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 16:16:50,850 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 16:16:50,851 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2024-02-02 16:16:50,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (47 of 49 remaining) [2024-02-02 16:16:50,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (46 of 49 remaining) [2024-02-02 16:16:50,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (45 of 49 remaining) [2024-02-02 16:16:50,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (44 of 49 remaining) [2024-02-02 16:16:50,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 49 remaining) [2024-02-02 16:16:50,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 49 remaining) [2024-02-02 16:16:50,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 49 remaining) [2024-02-02 16:16:50,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 49 remaining) [2024-02-02 16:16:50,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 49 remaining) [2024-02-02 16:16:50,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 49 remaining) [2024-02-02 16:16:50,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 49 remaining) [2024-02-02 16:16:50,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (36 of 49 remaining) [2024-02-02 16:16:50,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 49 remaining) [2024-02-02 16:16:50,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 49 remaining) [2024-02-02 16:16:50,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 49 remaining) [2024-02-02 16:16:50,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 49 remaining) [2024-02-02 16:16:50,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 49 remaining) [2024-02-02 16:16:50,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (24 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 49 remaining) [2024-02-02 16:16:50,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 49 remaining) [2024-02-02 16:16:50,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 49 remaining) [2024-02-02 16:16:50,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 49 remaining) [2024-02-02 16:16:50,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 49 remaining) [2024-02-02 16:16:50,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 49 remaining) [2024-02-02 16:16:50,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 49 remaining) [2024-02-02 16:16:50,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 49 remaining) [2024-02-02 16:16:50,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 49 remaining) [2024-02-02 16:16:50,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 49 remaining) [2024-02-02 16:16:50,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 49 remaining) [2024-02-02 16:16:50,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 49 remaining) [2024-02-02 16:16:50,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 49 remaining) [2024-02-02 16:16:50,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 49 remaining) [2024-02-02 16:16:50,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 49 remaining) [2024-02-02 16:16:50,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 49 remaining) [2024-02-02 16:16:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-02 16:16:50,857 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-02-02 16:16:50,858 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 16:16:50,858 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-02 16:16:50,893 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 16:16:50,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 161 transitions, 350 flow [2024-02-02 16:16:50,915 INFO L124 PetriNetUnfolderBase]: 16/172 cut-off events. [2024-02-02 16:16:50,916 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-02 16:16:50,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 172 events. 16/172 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 750 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 155. Up to 5 conditions per place. [2024-02-02 16:16:50,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 161 transitions, 350 flow [2024-02-02 16:16:50,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 161 transitions, 350 flow [2024-02-02 16:16:50,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 16:16:50,922 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;@3816c8f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 16:16:50,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-02-02 16:16:50,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 16:16:50,923 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-02 16:16:50,924 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-02 16:16:50,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:16:50,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 16:16:50,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 58 more)] === [2024-02-02 16:16:50,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:16:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash 585982510, now seen corresponding path program 1 times [2024-02-02 16:16:50,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:16:50,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383553630] [2024-02-02 16:16:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:16:50,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:16:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:16:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:16:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:16:50,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383553630] [2024-02-02 16:16:50,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383553630] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:16:50,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:16:50,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:16:50,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374598759] [2024-02-02 16:16:50,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:16:50,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:16:50,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:16:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:16:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:16:50,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 161 [2024-02-02 16:16:50,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 161 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 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) [2024-02-02 16:16:50,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:16:50,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 161 [2024-02-02 16:16:50,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand