./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/01b_inc-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/01b_inc-pthread.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/01b_inc-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-958ec4d-m [2024-02-07 14:22:03,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:22:03,664 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:22:03,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:22:03,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:22:03,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:22:03,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:22:03,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:22:03,698 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:22:03,701 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:22:03,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:22:03,702 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:22:03,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:22:03,704 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:22:03,704 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:22:03,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:22:03,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:22:03,704 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:22:03,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:22:03,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:22:03,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:22:03,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:22:03,706 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:22:03,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:22:03,706 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:22:03,706 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:22:03,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:22:03,707 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:22:03,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:22:03,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:22:03,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:22:03,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:22:03,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:22:03,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:22:03,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:22:03,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:22:03,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:22:03,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:22:03,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:22:03,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:22:03,710 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:22:03,710 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:22:03,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:22:03,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:22:03,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:22:03,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:22:03,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:22:03,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:22:03,943 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:22:03,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2024-02-07 14:22:05,054 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:22:05,271 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:22:05,271 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2024-02-07 14:22:05,285 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f163021/9cdafc919c0c4f98ba99fdae8b9d9708/FLAG5f1db8b0d [2024-02-07 14:22:05,295 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f163021/9cdafc919c0c4f98ba99fdae8b9d9708 [2024-02-07 14:22:05,297 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:22:05,298 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:22:05,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/01b_inc-pthread.yml/witness.yml [2024-02-07 14:22:05,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:22:05,372 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:22:05,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:22:05,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:22:05,377 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:22:05,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:22:05" (1/2) ... [2024-02-07 14:22:05,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d4582f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:22:05, skipping insertion in model container [2024-02-07 14:22:05,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:22:05" (1/2) ... [2024-02-07 14:22:05,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29d2b82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:22:05, skipping insertion in model container [2024-02-07 14:22:05,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:22:05" (2/2) ... [2024-02-07 14:22:05,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d4582f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05, skipping insertion in model container [2024-02-07 14:22:05,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:22:05" (2/2) ... [2024-02-07 14:22:05,381 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:22:05,416 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:22:05,418 INFO L76 edCorrectnessWitness]: Location invariant after [L697-L697] (v <= 4294967294U) && (v != 4294967295U) [2024-02-07 14:22:05,418 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (v <= 4294967294U) && (v != 4294967295U) [2024-02-07 14:22:05,418 INFO L76 edCorrectnessWitness]: Location invariant before [L696-L696] (((unsigned int )value <= 4294967294U) && (0U == v)) && ((unsigned int )value != 4294967295U) [2024-02-07 14:22:05,418 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (1U <= (unsigned int )value) && ((unsigned int )value != 0U) [2024-02-07 14:22:05,418 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (v <= 4294967294U) && (v != 4294967295U) [2024-02-07 14:22:05,419 INFO L76 edCorrectnessWitness]: Location invariant after [L697-L697] (1U <= (unsigned int )value) && ((unsigned int )value != 0U) [2024-02-07 14:22:05,419 INFO L76 edCorrectnessWitness]: Location invariant before [L692-L692] 0U == v [2024-02-07 14:22:05,419 INFO L76 edCorrectnessWitness]: Location invariant before [L693-L693] 0U == v [2024-02-07 14:22:05,420 INFO L76 edCorrectnessWitness]: Location invariant before [L691-L691] (0U == v) && (v == 0U) [2024-02-07 14:22:05,420 INFO L76 edCorrectnessWitness]: Location invariant before [L694-L694] 0U == v [2024-02-07 14:22:05,420 INFO L76 edCorrectnessWitness]: Location invariant before [L700-L700] (v <= 4294967294U) && (v != 4294967295U) [2024-02-07 14:22:05,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:22:05,682 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/01b_inc-pthread.i[30747,30760] [2024-02-07 14:22:05,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:22:05,701 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:22:05,761 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/01b_inc-pthread.i[30747,30760] [2024-02-07 14:22:05,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:22:05,795 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:22:05,796 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05 WrapperNode [2024-02-07 14:22:05,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:22:05,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:22:05,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:22:05,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:22:05,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,837 INFO L138 Inliner]: procedures = 164, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2024-02-07 14:22:05,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:22:05,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:22:05,838 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:22:05,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:22:05,846 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,858 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 1, 5]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 1 writes are split as follows [0, 1, 0]. [2024-02-07 14:22:05,858 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,858 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,864 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:22:05,868 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:22:05,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:22:05,869 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:22:05,869 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (1/1) ... [2024-02-07 14:22:05,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:22:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:22:05,894 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) [2024-02-07 14:22:05,900 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 [2024-02-07 14:22:05,922 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-07 14:22:05,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-07 14:22:05,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:22:05,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:22:05,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:22:05,923 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:22:05,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:22:05,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:22:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:22:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:22:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:22:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:22:05,927 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:22:06,063 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:22:06,065 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:22:06,209 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:22:06,209 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:22:06,354 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:22:06,354 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-07 14:22:06,354 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:22:06 BoogieIcfgContainer [2024-02-07 14:22:06,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:22:06,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:22:06,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:22:06,367 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:22:06,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:22:05" (1/4) ... [2024-02-07 14:22:06,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55564e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:22:06, skipping insertion in model container [2024-02-07 14:22:06,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:22:05" (2/4) ... [2024-02-07 14:22:06,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55564e73 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:22:06, skipping insertion in model container [2024-02-07 14:22:06,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:22:05" (3/4) ... [2024-02-07 14:22:06,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55564e73 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:22:06, skipping insertion in model container [2024-02-07 14:22:06,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:22:06" (4/4) ... [2024-02-07 14:22:06,370 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc-pthread.i [2024-02-07 14:22:06,402 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:22:06,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-02-07 14:22:06,403 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:22:06,447 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:22:06,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 74 flow [2024-02-07 14:22:06,499 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-02-07 14:22:06,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:22:06,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 37 events. 1/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-02-07 14:22:06,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 74 flow [2024-02-07 14:22:06,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 74 flow [2024-02-07 14:22:06,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:22:06,522 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;@2b76820a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:22:06,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 14:22:06,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:22:06,525 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-07 14:22:06,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:22:06,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:06,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:22:06,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:22:06,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:06,531 INFO L85 PathProgramCache]: Analyzing trace with hash 192062604, now seen corresponding path program 1 times [2024-02-07 14:22:06,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319153845] [2024-02-07 14:22:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:06,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:22:06,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319153845] [2024-02-07 14:22:06,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319153845] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:06,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520916446] [2024-02-07 14:22:06,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:22:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:22:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:22:06,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-02-07 14:22:06,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:22:06,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:06,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-02-07 14:22:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:06,908 INFO L124 PetriNetUnfolderBase]: 24/105 cut-off events. [2024-02-07 14:22:06,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:22:06,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 105 events. 24/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 328 event pairs, 16 based on Foata normal form. 9/102 useless extension candidates. Maximal degree in co-relation 163. Up to 46 conditions per place. [2024-02-07 14:22:06,912 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 16 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-02-07 14:22:06,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 102 flow [2024-02-07 14:22:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:22:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:22:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-07 14:22:06,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-02-07 14:22:06,922 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 74 flow. Second operand 3 states and 64 transitions. [2024-02-07 14:22:06,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 102 flow [2024-02-07 14:22:06,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:22:06,926 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 66 flow [2024-02-07 14:22:06,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-02-07 14:22:06,932 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2024-02-07 14:22:06,932 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 66 flow [2024-02-07 14:22:06,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:22:06,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:06,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-07 14:22:06,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:22:06,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:22:06,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:06,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1658971592, now seen corresponding path program 1 times [2024-02-07 14:22:06,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:06,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514523114] [2024-02-07 14:22:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:06,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:22:06,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:22:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:22:06,996 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:22:06,996 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:22:06,999 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 21 remaining) [2024-02-07 14:22:07,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 21 remaining) [2024-02-07 14:22:07,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 21 remaining) [2024-02-07 14:22:07,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 21 remaining) [2024-02-07 14:22:07,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 21 remaining) [2024-02-07 14:22:07,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 21 remaining) [2024-02-07 14:22:07,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 21 remaining) [2024-02-07 14:22:07,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 21 remaining) [2024-02-07 14:22:07,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 21 remaining) [2024-02-07 14:22:07,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 21 remaining) [2024-02-07 14:22:07,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (10 of 21 remaining) [2024-02-07 14:22:07,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 21 remaining) [2024-02-07 14:22:07,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 21 remaining) [2024-02-07 14:22:07,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 21 remaining) [2024-02-07 14:22:07,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 21 remaining) [2024-02-07 14:22:07,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 21 remaining) [2024-02-07 14:22:07,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 21 remaining) [2024-02-07 14:22:07,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 21 remaining) [2024-02-07 14:22:07,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 21 remaining) [2024-02-07 14:22:07,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 21 remaining) [2024-02-07 14:22:07,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (0 of 21 remaining) [2024-02-07 14:22:07,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:22:07,009 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 14:22:07,012 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:22:07,016 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 14:22:07,044 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:22:07,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 65 transitions, 140 flow [2024-02-07 14:22:07,065 INFO L124 PetriNetUnfolderBase]: 2/70 cut-off events. [2024-02-07 14:22:07,065 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:22:07,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 2/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 61. Up to 3 conditions per place. [2024-02-07 14:22:07,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 65 transitions, 140 flow [2024-02-07 14:22:07,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 65 transitions, 140 flow [2024-02-07 14:22:07,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:22:07,072 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;@2b76820a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:22:07,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-02-07 14:22:07,075 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:22:07,075 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-07 14:22:07,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:22:07,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:07,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:22:07,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:22:07,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash 254121226, now seen corresponding path program 1 times [2024-02-07 14:22:07,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:07,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039747599] [2024-02-07 14:22:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:07,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:22:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:07,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039747599] [2024-02-07 14:22:07,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039747599] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:07,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:07,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071255002] [2024-02-07 14:22:07,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:07,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:22:07,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:22:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:22:07,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 65 [2024-02-07 14:22:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2024-02-07 14:22:07,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:07,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 65 [2024-02-07 14:22:07,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:07,366 INFO L124 PetriNetUnfolderBase]: 781/1789 cut-off events. [2024-02-07 14:22:07,366 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-02-07 14:22:07,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 1789 events. 781/1789 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12622 event pairs, 541 based on Foata normal form. 114/1563 useless extension candidates. Maximal degree in co-relation 2561. Up to 856 conditions per place. [2024-02-07 14:22:07,377 INFO L140 encePairwiseOnDemand]: 56/65 looper letters, 40 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2024-02-07 14:22:07,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 243 flow [2024-02-07 14:22:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:22:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:22:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-02-07 14:22:07,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7230769230769231 [2024-02-07 14:22:07,379 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 140 flow. Second operand 3 states and 141 transitions. [2024-02-07 14:22:07,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 243 flow [2024-02-07 14:22:07,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:22:07,381 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 130 flow [2024-02-07 14:22:07,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-02-07 14:22:07,382 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2024-02-07 14:22:07,382 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 130 flow [2024-02-07 14:22:07,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2024-02-07 14:22:07,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:07,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:22:07,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:22:07,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:22:07,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1531209397, now seen corresponding path program 1 times [2024-02-07 14:22:07,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:07,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078106258] [2024-02-07 14:22:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:07,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:22:07,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:07,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078106258] [2024-02-07 14:22:07,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078106258] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:07,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:07,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:07,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843064212] [2024-02-07 14:22:07,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:07,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:22:07,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:07,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:22:07,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:22:07,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 65 [2024-02-07 14:22:07,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2024-02-07 14:22:07,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:07,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 65 [2024-02-07 14:22:07,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:07,654 INFO L124 PetriNetUnfolderBase]: 739/1787 cut-off events. [2024-02-07 14:22:07,654 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-02-07 14:22:07,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3159 conditions, 1787 events. 739/1787 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13266 event pairs, 511 based on Foata normal form. 108/1601 useless extension candidates. Maximal degree in co-relation 1688. Up to 874 conditions per place. [2024-02-07 14:22:07,662 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 39 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-07 14:22:07,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 234 flow [2024-02-07 14:22:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:22:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:22:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-02-07 14:22:07,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-02-07 14:22:07,667 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 130 flow. Second operand 3 states and 135 transitions. [2024-02-07 14:22:07,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 234 flow [2024-02-07 14:22:07,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:22:07,670 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 122 flow [2024-02-07 14:22:07,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-02-07 14:22:07,673 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 14:22:07,673 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 122 flow [2024-02-07 14:22:07,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2024-02-07 14:22:07,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:07,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-07 14:22:07,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:22:07,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:22:07,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash -222852793, now seen corresponding path program 1 times [2024-02-07 14:22:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132280629] [2024-02-07 14:22:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:22:07,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:22:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:22:07,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:22:07,691 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:22:07,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2024-02-07 14:22:07,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 31 remaining) [2024-02-07 14:22:07,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 31 remaining) [2024-02-07 14:22:07,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 31 remaining) [2024-02-07 14:22:07,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 31 remaining) [2024-02-07 14:22:07,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 31 remaining) [2024-02-07 14:22:07,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 31 remaining) [2024-02-07 14:22:07,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 31 remaining) [2024-02-07 14:22:07,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 31 remaining) [2024-02-07 14:22:07,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 31 remaining) [2024-02-07 14:22:07,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (20 of 31 remaining) [2024-02-07 14:22:07,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 31 remaining) [2024-02-07 14:22:07,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 31 remaining) [2024-02-07 14:22:07,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 31 remaining) [2024-02-07 14:22:07,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 31 remaining) [2024-02-07 14:22:07,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 31 remaining) [2024-02-07 14:22:07,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 31 remaining) [2024-02-07 14:22:07,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 31 remaining) [2024-02-07 14:22:07,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 31 remaining) [2024-02-07 14:22:07,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 31 remaining) [2024-02-07 14:22:07,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (10 of 31 remaining) [2024-02-07 14:22:07,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 31 remaining) [2024-02-07 14:22:07,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 31 remaining) [2024-02-07 14:22:07,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 31 remaining) [2024-02-07 14:22:07,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 31 remaining) [2024-02-07 14:22:07,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 31 remaining) [2024-02-07 14:22:07,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 31 remaining) [2024-02-07 14:22:07,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 31 remaining) [2024-02-07 14:22:07,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 31 remaining) [2024-02-07 14:22:07,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 31 remaining) [2024-02-07 14:22:07,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (0 of 31 remaining) [2024-02-07 14:22:07,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:22:07,696 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-07 14:22:07,697 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:22:07,697 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 14:22:07,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:22:07,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 95 transitions, 208 flow [2024-02-07 14:22:07,729 INFO L124 PetriNetUnfolderBase]: 3/103 cut-off events. [2024-02-07 14:22:07,729 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 14:22:07,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 3/103 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 385 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2024-02-07 14:22:07,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 95 transitions, 208 flow [2024-02-07 14:22:07,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 95 transitions, 208 flow [2024-02-07 14:22:07,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:22:07,732 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;@2b76820a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:22:07,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-02-07 14:22:07,733 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:22:07,733 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 14:22:07,733 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:22:07,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:07,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:22:07,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:22:07,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:07,734 INFO L85 PathProgramCache]: Analyzing trace with hash 344808070, now seen corresponding path program 1 times [2024-02-07 14:22:07,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:07,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736008688] [2024-02-07 14:22:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:07,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:22:07,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736008688] [2024-02-07 14:22:07,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736008688] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:07,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:07,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:07,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534117339] [2024-02-07 14:22:07,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:07,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:22:07,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:07,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:22:07,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:22:07,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 95 [2024-02-07 14:22:07,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2024-02-07 14:22:07,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:07,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 95 [2024-02-07 14:22:07,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:09,523 INFO L124 PetriNetUnfolderBase]: 15325/26029 cut-off events. [2024-02-07 14:22:09,523 INFO L125 PetriNetUnfolderBase]: For 1018/1018 co-relation queries the response was YES. [2024-02-07 14:22:09,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47330 conditions, 26029 events. 15325/26029 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 223780 event pairs, 11416 based on Foata normal form. 1398/21884 useless extension candidates. Maximal degree in co-relation 32601. Up to 14140 conditions per place. [2024-02-07 14:22:09,663 INFO L140 encePairwiseOnDemand]: 85/95 looper letters, 64 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-02-07 14:22:09,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 113 transitions, 388 flow [2024-02-07 14:22:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:22:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:22:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2024-02-07 14:22:09,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7649122807017544 [2024-02-07 14:22:09,666 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 208 flow. Second operand 3 states and 218 transitions. [2024-02-07 14:22:09,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 113 transitions, 388 flow [2024-02-07 14:22:09,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 384 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 14:22:09,671 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 194 flow [2024-02-07 14:22:09,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2024-02-07 14:22:09,673 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -6 predicate places. [2024-02-07 14:22:09,673 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 194 flow [2024-02-07 14:22:09,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2024-02-07 14:22:09,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:09,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:22:09,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:22:09,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:22:09,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:09,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1413744917, now seen corresponding path program 1 times [2024-02-07 14:22:09,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:09,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387849011] [2024-02-07 14:22:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:09,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:22:09,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:09,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387849011] [2024-02-07 14:22:09,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387849011] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:09,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:09,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144994941] [2024-02-07 14:22:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:09,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:22:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:22:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:22:09,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 95 [2024-02-07 14:22:09,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2024-02-07 14:22:09,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:09,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 95 [2024-02-07 14:22:09,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:11,394 INFO L124 PetriNetUnfolderBase]: 14971/26815 cut-off events. [2024-02-07 14:22:11,395 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2024-02-07 14:22:11,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48972 conditions, 26815 events. 14971/26815 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 246750 event pairs, 10345 based on Foata normal form. 1374/22680 useless extension candidates. Maximal degree in co-relation 27584. Up to 14158 conditions per place. [2024-02-07 14:22:11,556 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 63 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2024-02-07 14:22:11,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 375 flow [2024-02-07 14:22:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:22:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:22:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2024-02-07 14:22:11,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7368421052631579 [2024-02-07 14:22:11,557 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 194 flow. Second operand 3 states and 210 transitions. [2024-02-07 14:22:11,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 375 flow [2024-02-07 14:22:11,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 108 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:22:11,562 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 186 flow [2024-02-07 14:22:11,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-02-07 14:22:11,566 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2024-02-07 14:22:11,566 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 186 flow [2024-02-07 14:22:11,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2024-02-07 14:22:11,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:11,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:22:11,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:22:11,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:22:11,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1263605331, now seen corresponding path program 1 times [2024-02-07 14:22:11,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835213254] [2024-02-07 14:22:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:22:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835213254] [2024-02-07 14:22:11,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835213254] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:11,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:11,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:22:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850793140] [2024-02-07 14:22:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:11,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:22:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:22:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:22:11,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 95 [2024-02-07 14:22:11,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2024-02-07 14:22:11,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:11,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 95 [2024-02-07 14:22:11,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:15,060 INFO L124 PetriNetUnfolderBase]: 35080/59986 cut-off events. [2024-02-07 14:22:15,060 INFO L125 PetriNetUnfolderBase]: For 2752/2752 co-relation queries the response was YES. [2024-02-07 14:22:15,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111975 conditions, 59986 events. 35080/59986 cut-off events. For 2752/2752 co-relation queries the response was YES. Maximal size of possible extension queue 2382. Compared 557190 event pairs, 18670 based on Foata normal form. 0/47322 useless extension candidates. Maximal degree in co-relation 110485. Up to 19480 conditions per place. [2024-02-07 14:22:15,356 INFO L140 encePairwiseOnDemand]: 80/95 looper letters, 104 selfloop transitions, 12 changer transitions 0/149 dead transitions. [2024-02-07 14:22:15,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 578 flow [2024-02-07 14:22:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:22:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:22:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 268 transitions. [2024-02-07 14:22:15,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7052631578947368 [2024-02-07 14:22:15,358 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 186 flow. Second operand 4 states and 268 transitions. [2024-02-07 14:22:15,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 578 flow [2024-02-07 14:22:15,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 149 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:22:15,432 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 273 flow [2024-02-07 14:22:15,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=273, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2024-02-07 14:22:15,434 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2024-02-07 14:22:15,434 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 273 flow [2024-02-07 14:22:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2024-02-07 14:22:15,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:15,435 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:22:15,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:22:15,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:22:15,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash -482350969, now seen corresponding path program 1 times [2024-02-07 14:22:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:15,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121148087] [2024-02-07 14:22:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-07 14:22:15,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121148087] [2024-02-07 14:22:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121148087] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:15,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:15,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:15,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419634807] [2024-02-07 14:22:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:15,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:22:15,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:15,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:22:15,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:22:15,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 95 [2024-02-07 14:22:15,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2024-02-07 14:22:15,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:15,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 95 [2024-02-07 14:22:15,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:18,005 INFO L124 PetriNetUnfolderBase]: 22343/41409 cut-off events. [2024-02-07 14:22:18,005 INFO L125 PetriNetUnfolderBase]: For 11090/11762 co-relation queries the response was YES. [2024-02-07 14:22:18,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84860 conditions, 41409 events. 22343/41409 cut-off events. For 11090/11762 co-relation queries the response was YES. Maximal size of possible extension queue 1872. Compared 415784 event pairs, 14628 based on Foata normal form. 1878/38469 useless extension candidates. Maximal degree in co-relation 36851. Up to 22026 conditions per place. [2024-02-07 14:22:18,219 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 72 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2024-02-07 14:22:18,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 498 flow [2024-02-07 14:22:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:22:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:22:18,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 209 transitions. [2024-02-07 14:22:18,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-02-07 14:22:18,221 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 273 flow. Second operand 3 states and 209 transitions. [2024-02-07 14:22:18,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 498 flow [2024-02-07 14:22:18,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 117 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:22:18,225 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 268 flow [2024-02-07 14:22:18,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2024-02-07 14:22:18,226 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2024-02-07 14:22:18,226 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 268 flow [2024-02-07 14:22:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2024-02-07 14:22:18,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:18,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:22:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:22:18,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:22:18,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 517060012, now seen corresponding path program 1 times [2024-02-07 14:22:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917895262] [2024-02-07 14:22:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:22:18,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:18,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917895262] [2024-02-07 14:22:18,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917895262] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:18,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:18,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:18,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152686613] [2024-02-07 14:22:18,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:18,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:22:18,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:22:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:22:18,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 95 [2024-02-07 14:22:18,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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) [2024-02-07 14:22:18,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:18,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 95 [2024-02-07 14:22:18,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:22:20,535 INFO L124 PetriNetUnfolderBase]: 21932/38928 cut-off events. [2024-02-07 14:22:20,535 INFO L125 PetriNetUnfolderBase]: For 11016/11566 co-relation queries the response was YES. [2024-02-07 14:22:20,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81287 conditions, 38928 events. 21932/38928 cut-off events. For 11016/11566 co-relation queries the response was YES. Maximal size of possible extension queue 1872. Compared 367195 event pairs, 7786 based on Foata normal form. 924/35456 useless extension candidates. Maximal degree in co-relation 81116. Up to 18540 conditions per place. [2024-02-07 14:22:20,753 INFO L140 encePairwiseOnDemand]: 83/95 looper letters, 105 selfloop transitions, 12 changer transitions 0/156 dead transitions. [2024-02-07 14:22:20,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 156 transitions, 727 flow [2024-02-07 14:22:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:22:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:22:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-02-07 14:22:20,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7073684210526315 [2024-02-07 14:22:20,755 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 268 flow. Second operand 5 states and 336 transitions. [2024-02-07 14:22:20,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 156 transitions, 727 flow [2024-02-07 14:22:20,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 156 transitions, 707 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:22:20,761 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 378 flow [2024-02-07 14:22:20,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2024-02-07 14:22:20,762 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -5 predicate places. [2024-02-07 14:22:20,762 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 378 flow [2024-02-07 14:22:20,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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) [2024-02-07 14:22:20,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:20,763 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-07 14:22:20,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:22:20,763 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:22:20,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2067979769, now seen corresponding path program 1 times [2024-02-07 14:22:20,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:20,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59994430] [2024-02-07 14:22:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:20,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:22:20,772 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:22:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:22:20,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:22:20,778 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:22:20,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2024-02-07 14:22:20,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 41 remaining) [2024-02-07 14:22:20,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 41 remaining) [2024-02-07 14:22:20,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 41 remaining) [2024-02-07 14:22:20,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 41 remaining) [2024-02-07 14:22:20,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 41 remaining) [2024-02-07 14:22:20,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 41 remaining) [2024-02-07 14:22:20,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 41 remaining) [2024-02-07 14:22:20,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 41 remaining) [2024-02-07 14:22:20,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 41 remaining) [2024-02-07 14:22:20,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (30 of 41 remaining) [2024-02-07 14:22:20,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 41 remaining) [2024-02-07 14:22:20,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 41 remaining) [2024-02-07 14:22:20,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 41 remaining) [2024-02-07 14:22:20,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 41 remaining) [2024-02-07 14:22:20,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 41 remaining) [2024-02-07 14:22:20,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 41 remaining) [2024-02-07 14:22:20,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 41 remaining) [2024-02-07 14:22:20,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 41 remaining) [2024-02-07 14:22:20,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 41 remaining) [2024-02-07 14:22:20,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (20 of 41 remaining) [2024-02-07 14:22:20,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 41 remaining) [2024-02-07 14:22:20,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 41 remaining) [2024-02-07 14:22:20,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 41 remaining) [2024-02-07 14:22:20,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 41 remaining) [2024-02-07 14:22:20,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 41 remaining) [2024-02-07 14:22:20,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 41 remaining) [2024-02-07 14:22:20,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 41 remaining) [2024-02-07 14:22:20,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 41 remaining) [2024-02-07 14:22:20,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 41 remaining) [2024-02-07 14:22:20,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (10 of 41 remaining) [2024-02-07 14:22:20,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 41 remaining) [2024-02-07 14:22:20,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 41 remaining) [2024-02-07 14:22:20,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 41 remaining) [2024-02-07 14:22:20,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 41 remaining) [2024-02-07 14:22:20,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 41 remaining) [2024-02-07 14:22:20,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 41 remaining) [2024-02-07 14:22:20,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 41 remaining) [2024-02-07 14:22:20,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 41 remaining) [2024-02-07 14:22:20,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 41 remaining) [2024-02-07 14:22:20,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONERROR_FUNCTION (0 of 41 remaining) [2024-02-07 14:22:20,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 14:22:20,785 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-02-07 14:22:20,786 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:22:20,786 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-07 14:22:20,814 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:22:20,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 125 transitions, 278 flow [2024-02-07 14:22:20,829 INFO L124 PetriNetUnfolderBase]: 4/136 cut-off events. [2024-02-07 14:22:20,829 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-07 14:22:20,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 136 events. 4/136 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 579 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 119. Up to 5 conditions per place. [2024-02-07 14:22:20,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 125 transitions, 278 flow [2024-02-07 14:22:20,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 125 transitions, 278 flow [2024-02-07 14:22:20,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:22:20,836 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;@2b76820a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:22:20,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2024-02-07 14:22:20,837 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:22:20,837 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 14:22:20,837 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:22:20,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:22:20,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:22:20,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 48 more)] === [2024-02-07 14:22:20,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:22:20,838 INFO L85 PathProgramCache]: Analyzing trace with hash 464124992, now seen corresponding path program 1 times [2024-02-07 14:22:20,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:22:20,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104611278] [2024-02-07 14:22:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:22:20,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:22:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:22:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:22:20,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:22:20,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104611278] [2024-02-07 14:22:20,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104611278] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:22:20,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:22:20,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:22:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627850260] [2024-02-07 14:22:20,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:22:20,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:22:20,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:22:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:22:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:22:20,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 125 [2024-02-07 14:22:20,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2024-02-07 14:22:20,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:22:20,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 125 [2024-02-07 14:22:20,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand