./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 59af5db6 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-dev-59af5db-m [2024-02-02 09:23:18,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:23:18,564 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:23:18,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:23:18,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:23:18,589 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:23:18,592 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:23:18,592 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:23:18,593 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:23:18,595 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:23:18,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:23:18,596 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:23:18,597 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:23:18,598 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:23:18,598 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:23:18,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:23:18,598 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:23:18,598 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:23:18,598 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:23:18,599 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:23:18,599 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:23:18,599 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:23:18,599 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:23:18,600 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:23:18,600 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:23:18,600 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:23:18,600 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:23:18,600 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:23:18,601 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:23:18,601 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:23:18,602 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:23:18,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:23:18,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:23:18,602 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:23:18,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:23:18,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:23:18,603 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:23:18,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:23:18,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:23:18,603 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:23:18,603 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:23:18,603 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:23:18,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:23:18,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:23:18,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:23:18,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:23:18,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:23:18,848 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:23:18,849 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:23:18,849 INFO L431 ainManager$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 09:23:18,947 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:23:18,948 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:23:18,949 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-02-02 09:23:19,892 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:23:20,087 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:23:20,087 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-02-02 09:23:20,096 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5331616d9/a2ad072ad274406682fbaee929b4c875/FLAG7da050598 [2024-02-02 09:23:20,105 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5331616d9/a2ad072ad274406682fbaee929b4c875 [2024-02-02 09:23:20,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:23:20,110 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:23:20,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:23:20,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:23:20,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:23:20,120 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:23:18" (1/2) ... [2024-02-02 09:23:20,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f43979e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:23:20, skipping insertion in model container [2024-02-02 09:23:20,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:23:18" (1/2) ... [2024-02-02 09:23:20,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f93b043 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:23:20, skipping insertion in model container [2024-02-02 09:23:20,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:23:20" (2/2) ... [2024-02-02 09:23:20,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f43979e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20, skipping insertion in model container [2024-02-02 09:23:20,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:23:20" (2/2) ... [2024-02-02 09:23:20,123 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:23:20,151 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:23:20,152 INFO L101 nessWitnessExtractor]: Location invariant before [L704-L704] ((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL) [2024-02-02 09:23:20,152 INFO L101 nessWitnessExtractor]: Loop invariant at [L699-L700] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-02 09:23:20,152 INFO L101 nessWitnessExtractor]: Location invariant before [L704-L704] ((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL) [2024-02-02 09:23:20,152 INFO L101 nessWitnessExtractor]: Location invariant before [L694-L700] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-02 09:23:20,152 INFO L101 nessWitnessExtractor]: Location invariant after [L694-L700] COND == (_Bool)0 [2024-02-02 09:23:20,152 INFO L101 nessWitnessExtractor]: Location invariant after [L694-L697] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-02-02 09:23:20,153 INFO L101 nessWitnessExtractor]: Location invariant before [L696-L696] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-02-02 09:23:20,153 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-02 09:23:20,153 INFO L101 nessWitnessExtractor]: Location invariant after [L691-L701] COND == (_Bool)1 [2024-02-02 09:23:20,153 INFO L101 nessWitnessExtractor]: Location invariant before [L703-L703] (unsigned long )arg == 0UL [2024-02-02 09:23:20,153 INFO L101 nessWitnessExtractor]: Location invariant before [L695-L695] ((unsigned int )count == 3U) && (COND == (_Bool)0 || COND == (_Bool)1) [2024-02-02 09:23:20,186 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:23:20,442 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 09:23:20,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:23:20,459 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:23:20,520 WARN L424 MainDispatcher]: Unable to annotate void Barrier2() { pthread_mutex_lock(&MTX); count++; if (count == 3) { COND = 1; pthread_cond_broadcast(&CONDVAR); count = 0; } else { while (!COND) pthread_cond_wait(&CONDVAR, &MTX); } pthread_mutex_unlock(&MTX); } with a witness entry Start Parsing Local [2024-02-02 09:23:20,521 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 09:23:20,522 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry [2024-02-02 09:23:20,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:23:20,553 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:23:20,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20 WrapperNode [2024-02-02 09:23:20,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:23:20,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:23:20,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:23:20,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:23:20,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,586 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,610 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-02-02 09:23:20,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:23:20,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:23:20,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:23:20,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:23:20,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,630 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,649 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 1, 5, 10]. 56 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 0, 5, 10]. The 1 writes are split as follows [0, 1, 0, 0]. [2024-02-02 09:23:20,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,660 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:23:20,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:23:20,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:23:20,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:23:20,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (1/1) ... [2024-02-02 09:23:20,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:23:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:23:20,707 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 09:23:20,726 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 09:23:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-02 09:23:20,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-02 09:23:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:23:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:23:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:23:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 09:23:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 09:23:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:23:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:23:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:23:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:23:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:23:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:23:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 09:23:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 09:23:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:23:20,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:23:20,743 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 09:23:20,871 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:23:20,872 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:23:21,049 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:23:21,049 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:23:21,174 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:23:21,174 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-02 09:23:21,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:23:21 BoogieIcfgContainer [2024-02-02 09:23:21,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:23:21,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:23:21,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:23:21,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:23:21,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:23:18" (1/4) ... [2024-02-02 09:23:21,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246df495 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:23:21, skipping insertion in model container [2024-02-02 09:23:21,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:23:20" (2/4) ... [2024-02-02 09:23:21,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246df495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:23:21, skipping insertion in model container [2024-02-02 09:23:21,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:23:20" (3/4) ... [2024-02-02 09:23:21,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246df495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:23:21, skipping insertion in model container [2024-02-02 09:23:21,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:23:21" (4/4) ... [2024-02-02 09:23:21,180 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2024-02-02 09:23:21,192 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:23:21,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-02-02 09:23:21,192 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:23:21,239 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 09:23:21,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 39 transitions, 82 flow [2024-02-02 09:23:21,281 INFO L124 PetriNetUnfolderBase]: 2/41 cut-off events. [2024-02-02 09:23:21,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:23:21,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 2/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-02-02 09:23:21,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 39 transitions, 82 flow [2024-02-02 09:23:21,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 39 transitions, 82 flow [2024-02-02 09:23:21,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:23:21,298 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;@41405c30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:23:21,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2024-02-02 09:23:21,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:23:21,300 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-02 09:23:21,301 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:23:21,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:21,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:23:21,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 20 more)] === [2024-02-02 09:23:21,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:21,305 INFO L85 PathProgramCache]: Analyzing trace with hash 235692387, now seen corresponding path program 1 times [2024-02-02 09:23:21,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:21,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641099698] [2024-02-02 09:23:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:21,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:21,625 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 09:23:21,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641099698] [2024-02-02 09:23:21,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641099698] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:21,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:21,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885593868] [2024-02-02 09:23:21,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:21,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:21,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:21,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 39 [2024-02-02 09:23:21,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:23:21,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:21,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 39 [2024-02-02 09:23:21,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:21,726 INFO L124 PetriNetUnfolderBase]: 28/118 cut-off events. [2024-02-02 09:23:21,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:23:21,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 118 events. 28/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 409 event pairs, 0 based on Foata normal form. 6/106 useless extension candidates. Maximal degree in co-relation 171. Up to 55 conditions per place. [2024-02-02 09:23:21,730 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 16 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-02-02 09:23:21,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 116 flow [2024-02-02 09:23:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:23:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:23:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-02-02 09:23:21,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-02 09:23:21,740 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 82 flow. Second operand 4 states and 104 transitions. [2024-02-02 09:23:21,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 116 flow [2024-02-02 09:23:21,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 09:23:21,744 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 78 flow [2024-02-02 09:23:21,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-02-02 09:23:21,748 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-02-02 09:23:21,748 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 78 flow [2024-02-02 09:23:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:23:21,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:21,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-02 09:23:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:23:21,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 20 more)] === [2024-02-02 09:23:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1283492721, now seen corresponding path program 1 times [2024-02-02 09:23:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762259947] [2024-02-02 09:23:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:23:21,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 09:23:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:23:21,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 09:23:21,782 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 09:23:21,783 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2024-02-02 09:23:21,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 23 remaining) [2024-02-02 09:23:21,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 23 remaining) [2024-02-02 09:23:21,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 23 remaining) [2024-02-02 09:23:21,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 23 remaining) [2024-02-02 09:23:21,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 23 remaining) [2024-02-02 09:23:21,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 23 remaining) [2024-02-02 09:23:21,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 23 remaining) [2024-02-02 09:23:21,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 23 remaining) [2024-02-02 09:23:21,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 23 remaining) [2024-02-02 09:23:21,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 23 remaining) [2024-02-02 09:23:21,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (11 of 23 remaining) [2024-02-02 09:23:21,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 23 remaining) [2024-02-02 09:23:21,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 23 remaining) [2024-02-02 09:23:21,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 23 remaining) [2024-02-02 09:23:21,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 23 remaining) [2024-02-02 09:23:21,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 23 remaining) [2024-02-02 09:23:21,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 23 remaining) [2024-02-02 09:23:21,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 23 remaining) [2024-02-02 09:23:21,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 23 remaining) [2024-02-02 09:23:21,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 23 remaining) [2024-02-02 09:23:21,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 23 remaining) [2024-02-02 09:23:21,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (0 of 23 remaining) [2024-02-02 09:23:21,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:23:21,789 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-02 09:23:21,791 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 09:23:21,791 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-02 09:23:21,811 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 09:23:21,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 156 flow [2024-02-02 09:23:21,822 INFO L124 PetriNetUnfolderBase]: 4/78 cut-off events. [2024-02-02 09:23:21,823 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:23:21,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 78 events. 4/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 228 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 69. Up to 3 conditions per place. [2024-02-02 09:23:21,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 156 flow [2024-02-02 09:23:21,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 156 flow [2024-02-02 09:23:21,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:23:21,826 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;@41405c30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:23:21,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-02-02 09:23:21,828 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:23:21,828 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-02 09:23:21,828 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:23:21,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:21,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:23:21,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-02 09:23:21,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash 305389421, now seen corresponding path program 1 times [2024-02-02 09:23:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580928215] [2024-02-02 09:23:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:21,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:21,889 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 09:23:21,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580928215] [2024-02-02 09:23:21,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580928215] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:21,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:21,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790957650] [2024-02-02 09:23:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:21,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:21,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 73 [2024-02-02 09:23:21,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 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 09:23:21,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:21,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 73 [2024-02-02 09:23:21,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:22,204 INFO L124 PetriNetUnfolderBase]: 703/1807 cut-off events. [2024-02-02 09:23:22,204 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-02-02 09:23:22,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2908 conditions, 1807 events. 703/1807 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13631 event pairs, 20 based on Foata normal form. 108/1662 useless extension candidates. Maximal degree in co-relation 2663. Up to 1001 conditions per place. [2024-02-02 09:23:22,217 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 38 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-02 09:23:22,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 82 transitions, 259 flow [2024-02-02 09:23:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:23:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:23:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2024-02-02 09:23:22,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7397260273972602 [2024-02-02 09:23:22,223 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 156 flow. Second operand 4 states and 216 transitions. [2024-02-02 09:23:22,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 82 transitions, 259 flow [2024-02-02 09:23:22,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 09:23:22,226 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 150 flow [2024-02-02 09:23:22,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-02-02 09:23:22,227 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2024-02-02 09:23:22,227 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 150 flow [2024-02-02 09:23:22,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 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 09:23:22,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:22,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:22,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:23:22,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-02 09:23:22,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1115867583, now seen corresponding path program 1 times [2024-02-02 09:23:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602786145] [2024-02-02 09:23:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:22,343 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 09:23:22,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602786145] [2024-02-02 09:23:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602786145] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:22,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:23:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351429285] [2024-02-02 09:23:22,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:23:22,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:23:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:23:22,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 73 [2024-02-02 09:23:22,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 09:23:22,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:22,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 73 [2024-02-02 09:23:22,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:22,610 INFO L124 PetriNetUnfolderBase]: 1009/2169 cut-off events. [2024-02-02 09:23:22,610 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-02-02 09:23:22,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3813 conditions, 2169 events. 1009/2169 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14915 event pairs, 358 based on Foata normal form. 156/2199 useless extension candidates. Maximal degree in co-relation 3797. Up to 1297 conditions per place. [2024-02-02 09:23:22,622 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 49 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2024-02-02 09:23:22,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 289 flow [2024-02-02 09:23:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:23:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:23:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-02-02 09:23:22,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7351598173515982 [2024-02-02 09:23:22,624 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 150 flow. Second operand 3 states and 161 transitions. [2024-02-02 09:23:22,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 289 flow [2024-02-02 09:23:22,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:23:22,627 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 184 flow [2024-02-02 09:23:22,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-02-02 09:23:22,629 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-02-02 09:23:22,629 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 184 flow [2024-02-02 09:23:22,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 09:23:22,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:22,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:23:22,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-02 09:23:22,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1062898962, now seen corresponding path program 1 times [2024-02-02 09:23:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106971396] [2024-02-02 09:23:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:22,724 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 09:23:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106971396] [2024-02-02 09:23:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106971396] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:22,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:22,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:22,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296298833] [2024-02-02 09:23:22,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:22,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:22,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 73 [2024-02-02 09:23:22,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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 09:23:22,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:22,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 73 [2024-02-02 09:23:22,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:22,887 INFO L124 PetriNetUnfolderBase]: 606/1537 cut-off events. [2024-02-02 09:23:22,887 INFO L125 PetriNetUnfolderBase]: For 120/144 co-relation queries the response was YES. [2024-02-02 09:23:22,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 1537 events. 606/1537 cut-off events. For 120/144 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10991 event pairs, 33 based on Foata normal form. 33/1456 useless extension candidates. Maximal degree in co-relation 2705. Up to 846 conditions per place. [2024-02-02 09:23:22,894 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 48 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-02-02 09:23:22,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 330 flow [2024-02-02 09:23:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:23:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:23:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 218 transitions. [2024-02-02 09:23:22,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7465753424657534 [2024-02-02 09:23:22,896 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 184 flow. Second operand 4 states and 218 transitions. [2024-02-02 09:23:22,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 330 flow [2024-02-02 09:23:22,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:23:22,900 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 181 flow [2024-02-02 09:23:22,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-02-02 09:23:22,901 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-02-02 09:23:22,902 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 181 flow [2024-02-02 09:23:22,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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 09:23:22,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:22,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-02 09:23:22,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:23:22,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-02 09:23:22,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1409892566, now seen corresponding path program 1 times [2024-02-02 09:23:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:22,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773733062] [2024-02-02 09:23:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:22,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:23:22,918 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 09:23:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:23:22,935 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 09:23:22,936 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 09:23:22,936 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2024-02-02 09:23:22,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 34 remaining) [2024-02-02 09:23:22,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 34 remaining) [2024-02-02 09:23:22,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 34 remaining) [2024-02-02 09:23:22,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 34 remaining) [2024-02-02 09:23:22,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 34 remaining) [2024-02-02 09:23:22,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 34 remaining) [2024-02-02 09:23:22,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 34 remaining) [2024-02-02 09:23:22,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 34 remaining) [2024-02-02 09:23:22,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 34 remaining) [2024-02-02 09:23:22,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 34 remaining) [2024-02-02 09:23:22,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (22 of 34 remaining) [2024-02-02 09:23:22,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 34 remaining) [2024-02-02 09:23:22,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 34 remaining) [2024-02-02 09:23:22,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 34 remaining) [2024-02-02 09:23:22,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 34 remaining) [2024-02-02 09:23:22,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 34 remaining) [2024-02-02 09:23:22,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 34 remaining) [2024-02-02 09:23:22,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 34 remaining) [2024-02-02 09:23:22,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 34 remaining) [2024-02-02 09:23:22,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 34 remaining) [2024-02-02 09:23:22,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 34 remaining) [2024-02-02 09:23:22,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (11 of 34 remaining) [2024-02-02 09:23:22,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 34 remaining) [2024-02-02 09:23:22,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 34 remaining) [2024-02-02 09:23:22,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 34 remaining) [2024-02-02 09:23:22,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 34 remaining) [2024-02-02 09:23:22,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 34 remaining) [2024-02-02 09:23:22,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 34 remaining) [2024-02-02 09:23:22,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 34 remaining) [2024-02-02 09:23:22,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 34 remaining) [2024-02-02 09:23:22,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 34 remaining) [2024-02-02 09:23:22,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 34 remaining) [2024-02-02 09:23:22,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (0 of 34 remaining) [2024-02-02 09:23:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:23:22,945 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-02-02 09:23:22,945 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 09:23:22,945 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-02 09:23:22,976 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 09:23:22,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 107 transitions, 232 flow [2024-02-02 09:23:22,989 INFO L124 PetriNetUnfolderBase]: 6/115 cut-off events. [2024-02-02 09:23:22,989 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-02 09:23:22,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 115 events. 6/115 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 434 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 102. Up to 4 conditions per place. [2024-02-02 09:23:22,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 107 transitions, 232 flow [2024-02-02 09:23:22,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 107 transitions, 232 flow [2024-02-02 09:23:22,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:23:22,996 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;@41405c30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:23:22,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-02-02 09:23:22,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:23:22,998 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-02 09:23:22,998 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-02 09:23:22,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:22,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:23:22,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-02-02 09:23:22,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 407531769, now seen corresponding path program 1 times [2024-02-02 09:23:22,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:22,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423676105] [2024-02-02 09:23:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:22,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:23,060 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 09:23:23,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:23,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423676105] [2024-02-02 09:23:23,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423676105] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:23,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:23,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:23,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188752296] [2024-02-02 09:23:23,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:23,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:23,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:23,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:23,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2024-02-02 09:23:23,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 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 09:23:23,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:23,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2024-02-02 09:23:23,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:25,048 INFO L124 PetriNetUnfolderBase]: 14071/28777 cut-off events. [2024-02-02 09:23:25,048 INFO L125 PetriNetUnfolderBase]: For 832/832 co-relation queries the response was YES. [2024-02-02 09:23:25,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47042 conditions, 28777 events. 14071/28777 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 1226. Compared 289584 event pairs, 6282 based on Foata normal form. 1599/25263 useless extension candidates. Maximal degree in co-relation 39326. Up to 16651 conditions per place. [2024-02-02 09:23:25,248 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 60 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-02-02 09:23:25,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 126 transitions, 406 flow [2024-02-02 09:23:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:23:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:23:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 328 transitions. [2024-02-02 09:23:25,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7663551401869159 [2024-02-02 09:23:25,249 INFO L175 Difference]: Start difference. First operand has 108 places, 107 transitions, 232 flow. Second operand 4 states and 328 transitions. [2024-02-02 09:23:25,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 126 transitions, 406 flow [2024-02-02 09:23:25,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 126 transitions, 402 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-02 09:23:25,252 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 222 flow [2024-02-02 09:23:25,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2024-02-02 09:23:25,253 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -3 predicate places. [2024-02-02 09:23:25,253 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 222 flow [2024-02-02 09:23:25,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 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 09:23:25,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:25,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:25,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 09:23:25,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-02-02 09:23:25,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1146084558, now seen corresponding path program 1 times [2024-02-02 09:23:25,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:25,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365548345] [2024-02-02 09:23:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:25,302 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 09:23:25,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:25,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365548345] [2024-02-02 09:23:25,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365548345] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:25,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:25,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:25,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361443861] [2024-02-02 09:23:25,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:25,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:25,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:25,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:25,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:25,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2024-02-02 09:23:25,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 09:23:25,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:25,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2024-02-02 09:23:25,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:26,705 INFO L124 PetriNetUnfolderBase]: 12079/24288 cut-off events. [2024-02-02 09:23:26,706 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2024-02-02 09:23:26,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40729 conditions, 24288 events. 12079/24288 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 244684 event pairs, 240 based on Foata normal form. 396/21869 useless extension candidates. Maximal degree in co-relation 40712. Up to 14971 conditions per place. [2024-02-02 09:23:26,863 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 70 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2024-02-02 09:23:26,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 134 transitions, 437 flow [2024-02-02 09:23:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:23:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:23:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 330 transitions. [2024-02-02 09:23:26,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7710280373831776 [2024-02-02 09:23:26,865 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 222 flow. Second operand 4 states and 330 transitions. [2024-02-02 09:23:26,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 134 transitions, 437 flow [2024-02-02 09:23:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:23:26,868 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 219 flow [2024-02-02 09:23:26,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-02-02 09:23:26,868 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -4 predicate places. [2024-02-02 09:23:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 219 flow [2024-02-02 09:23:26,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 09:23:26,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:26,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:26,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 09:23:26,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-02-02 09:23:26,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1093149762, now seen corresponding path program 1 times [2024-02-02 09:23:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960742163] [2024-02-02 09:23:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:26,911 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 09:23:26,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:26,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960742163] [2024-02-02 09:23:26,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960742163] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:26,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:26,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:23:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486533410] [2024-02-02 09:23:26,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:23:26,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:23:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:23:26,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2024-02-02 09:23:26,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 09:23:26,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:26,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2024-02-02 09:23:26,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:29,547 INFO L124 PetriNetUnfolderBase]: 29065/46720 cut-off events. [2024-02-02 09:23:29,547 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2024-02-02 09:23:29,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86841 conditions, 46720 events. 29065/46720 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 2212. Compared 396840 event pairs, 10246 based on Foata normal form. 1527/45656 useless extension candidates. Maximal degree in co-relation 86825. Up to 36877 conditions per place. [2024-02-02 09:23:29,832 INFO L140 encePairwiseOnDemand]: 88/107 looper letters, 72 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-02-02 09:23:29,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 427 flow [2024-02-02 09:23:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:23:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:23:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2024-02-02 09:23:29,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7414330218068536 [2024-02-02 09:23:29,834 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 219 flow. Second operand 3 states and 238 transitions. [2024-02-02 09:23:29,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 427 flow [2024-02-02 09:23:29,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:23:29,838 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 270 flow [2024-02-02 09:23:29,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-02-02 09:23:29,839 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -3 predicate places. [2024-02-02 09:23:29,839 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 270 flow [2024-02-02 09:23:29,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 09:23:29,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:29,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:23:29,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-02-02 09:23:29,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1901006330, now seen corresponding path program 1 times [2024-02-02 09:23:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:29,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137810838] [2024-02-02 09:23:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:29,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:29,904 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 09:23:29,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:29,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137810838] [2024-02-02 09:23:29,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137810838] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:29,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:29,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:29,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742646358] [2024-02-02 09:23:29,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:29,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:29,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:29,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 107 [2024-02-02 09:23:29,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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 09:23:29,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:29,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 107 [2024-02-02 09:23:29,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:31,509 INFO L124 PetriNetUnfolderBase]: 13179/25215 cut-off events. [2024-02-02 09:23:31,509 INFO L125 PetriNetUnfolderBase]: For 3227/4783 co-relation queries the response was YES. [2024-02-02 09:23:31,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47677 conditions, 25215 events. 13179/25215 cut-off events. For 3227/4783 co-relation queries the response was YES. Maximal size of possible extension queue 1340. Compared 244419 event pairs, 1714 based on Foata normal form. 411/23270 useless extension candidates. Maximal degree in co-relation 47659. Up to 14817 conditions per place. [2024-02-02 09:23:31,658 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 86 selfloop transitions, 2 changer transitions 0/148 dead transitions. [2024-02-02 09:23:31,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 148 transitions, 566 flow [2024-02-02 09:23:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:23:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:23:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 339 transitions. [2024-02-02 09:23:31,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7920560747663551 [2024-02-02 09:23:31,662 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 270 flow. Second operand 4 states and 339 transitions. [2024-02-02 09:23:31,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 148 transitions, 566 flow [2024-02-02 09:23:31,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:23:31,670 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 266 flow [2024-02-02 09:23:31,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-02-02 09:23:31,673 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -3 predicate places. [2024-02-02 09:23:31,673 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 266 flow [2024-02-02 09:23:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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 09:23:31,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:31,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:31,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 09:23:31,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-02-02 09:23:31,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1582050753, now seen corresponding path program 1 times [2024-02-02 09:23:31,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:31,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770807914] [2024-02-02 09:23:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:31,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:31,743 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 09:23:31,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770807914] [2024-02-02 09:23:31,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770807914] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:31,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:31,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:31,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261006189] [2024-02-02 09:23:31,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:31,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:31,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:31,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:31,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 107 [2024-02-02 09:23:31,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 09:23:31,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:31,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 107 [2024-02-02 09:23:31,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:38,308 INFO L124 PetriNetUnfolderBase]: 76924/119061 cut-off events. [2024-02-02 09:23:38,308 INFO L125 PetriNetUnfolderBase]: For 15743/15743 co-relation queries the response was YES. [2024-02-02 09:23:38,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235916 conditions, 119061 events. 76924/119061 cut-off events. For 15743/15743 co-relation queries the response was YES. Maximal size of possible extension queue 3193. Compared 990658 event pairs, 30889 based on Foata normal form. 14928/130893 useless extension candidates. Maximal degree in co-relation 235898. Up to 59418 conditions per place. [2024-02-02 09:23:39,076 INFO L140 encePairwiseOnDemand]: 73/107 looper letters, 105 selfloop transitions, 19 changer transitions 0/146 dead transitions. [2024-02-02 09:23:39,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 146 transitions, 612 flow [2024-02-02 09:23:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:23:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:23:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 260 transitions. [2024-02-02 09:23:39,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074766355140186 [2024-02-02 09:23:39,078 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 266 flow. Second operand 4 states and 260 transitions. [2024-02-02 09:23:39,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 146 transitions, 612 flow [2024-02-02 09:23:39,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 146 transitions, 607 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:23:39,086 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 386 flow [2024-02-02 09:23:39,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-02-02 09:23:39,087 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -12 predicate places. [2024-02-02 09:23:39,087 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 386 flow [2024-02-02 09:23:39,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 09:23:39,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:39,087 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-02 09:23:39,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 09:23:39,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-02-02 09:23:39,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1198367794, now seen corresponding path program 1 times [2024-02-02 09:23:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:39,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41428773] [2024-02-02 09:23:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:23:39,097 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-02 09:23:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-02 09:23:39,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-02 09:23:39,104 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-02 09:23:39,105 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2024-02-02 09:23:39,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 45 remaining) [2024-02-02 09:23:39,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 45 remaining) [2024-02-02 09:23:39,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 45 remaining) [2024-02-02 09:23:39,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 45 remaining) [2024-02-02 09:23:39,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (33 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 45 remaining) [2024-02-02 09:23:39,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 45 remaining) [2024-02-02 09:23:39,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 45 remaining) [2024-02-02 09:23:39,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (22 of 45 remaining) [2024-02-02 09:23:39,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 45 remaining) [2024-02-02 09:23:39,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 45 remaining) [2024-02-02 09:23:39,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 45 remaining) [2024-02-02 09:23:39,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 45 remaining) [2024-02-02 09:23:39,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 45 remaining) [2024-02-02 09:23:39,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (11 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 45 remaining) [2024-02-02 09:23:39,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 45 remaining) [2024-02-02 09:23:39,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 45 remaining) [2024-02-02 09:23:39,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 45 remaining) [2024-02-02 09:23:39,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 45 remaining) [2024-02-02 09:23:39,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 45 remaining) [2024-02-02 09:23:39,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 45 remaining) [2024-02-02 09:23:39,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 45 remaining) [2024-02-02 09:23:39,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 45 remaining) [2024-02-02 09:23:39,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (0 of 45 remaining) [2024-02-02 09:23:39,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-02 09:23:39,111 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-02-02 09:23:39,111 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-02 09:23:39,111 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-02 09:23:39,300 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-02 09:23:39,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 141 transitions, 310 flow [2024-02-02 09:23:39,317 INFO L124 PetriNetUnfolderBase]: 8/152 cut-off events. [2024-02-02 09:23:39,317 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-02 09:23:39,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 152 events. 8/152 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 635 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 135. Up to 5 conditions per place. [2024-02-02 09:23:39,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 141 transitions, 310 flow [2024-02-02 09:23:39,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 141 transitions, 310 flow [2024-02-02 09:23:39,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:23:39,323 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;@41405c30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:23:39,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2024-02-02 09:23:39,324 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:23:39,325 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-02 09:23:39,325 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-02 09:23:39,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:39,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:23:39,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 53 more)] === [2024-02-02 09:23:39,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:39,326 INFO L85 PathProgramCache]: Analyzing trace with hash 542121543, now seen corresponding path program 1 times [2024-02-02 09:23:39,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:39,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60550347] [2024-02-02 09:23:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:39,381 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 09:23:39,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60550347] [2024-02-02 09:23:39,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60550347] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:23:39,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:23:39,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:23:39,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860915853] [2024-02-02 09:23:39,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:23:39,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:23:39,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:23:39,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:23:39,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 141 [2024-02-02 09:23:39,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 141 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 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 09:23:39,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:39,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 141 [2024-02-02 09:23:39,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand