./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.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/01b_inc-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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.2023-12-19_14-39-08.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-?-80b1b13-m [2024-01-31 16:41:29,060 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:41:29,116 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:41:29,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:41:29,125 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:41:29,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:41:29,149 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:41:29,150 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:41:29,150 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:41:29,150 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:41:29,151 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:41:29,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:41:29,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:41:29,152 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:41:29,152 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:41:29,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:41:29,153 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:41:29,153 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:41:29,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:41:29,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:41:29,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:41:29,154 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:41:29,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:41:29,155 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:41:29,155 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:41:29,155 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:41:29,156 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:41:29,156 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:41:29,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:41:29,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:41:29,157 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:41:29,157 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:41:29,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:41:29,157 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:41:29,158 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:41:29,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:41:29,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:41:29,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:41:29,158 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:41:29,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:41:29,159 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:41:29,159 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:41:29,160 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:41:29,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:41:29,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:41:29,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:41:29,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:41:29,376 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:41:29,377 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:41:29,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2024-01-31 16:41:30,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:41:30,607 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:41:30,620 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc-pthread.i [2024-01-31 16:41:30,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13d19ed4/2a3443b2bcfc49438c7c6b243524d206/FLAG9854caef6 [2024-01-31 16:41:30,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f13d19ed4/2a3443b2bcfc49438c7c6b243524d206 [2024-01-31 16:41:30,651 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:41:30,652 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:41:30,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/01b_inc-pthread.yml/witness.yml [2024-01-31 16:41:30,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:41:30,756 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:41:30,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:41:30,759 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:41:30,762 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:41:30,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:41:30" (1/2) ... [2024-01-31 16:41:30,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6a7497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:41:30, skipping insertion in model container [2024-01-31 16:41:30,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:41:30" (1/2) ... [2024-01-31 16:41:30,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50cbe7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:41:30, skipping insertion in model container [2024-01-31 16:41:30,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:41:30" (2/2) ... [2024-01-31 16:41:30,767 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6a7497 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:30, skipping insertion in model container [2024-01-31 16:41:30,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:41:30" (2/2) ... [2024-01-31 16:41:30,767 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:41:30,866 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:41:30,867 INFO L98 nessWitnessExtractor]: Location invariant before [L700-L700] (((v <= 4294967294U) && ((unsigned int )value <= 4294967294U)) && ((unsigned long )arg == 0UL)) && (v != 4294967295U) [2024-01-31 16:41:30,867 INFO L98 nessWitnessExtractor]: Location invariant after [L697-L697] ((((v <= 4294967294U) && ((unsigned int )value <= 4294967294U)) && ((unsigned long )arg == 0UL)) && (v != 4294967295U)) && ((unsigned int )value != 4294967295U) [2024-01-31 16:41:30,868 INFO L98 nessWitnessExtractor]: Location invariant after [L697-L697] ((((1U <= (unsigned int )value) && (v <= 4294967294U)) && ((unsigned long )arg == 0UL)) && (v != 4294967295U)) && ((unsigned int )value != 0U) [2024-01-31 16:41:30,868 INFO L98 nessWitnessExtractor]: Location invariant after [L690-L690] (unsigned long )arg == 0UL [2024-01-31 16:41:30,904 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:41:31,146 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] [2024-01-31 16:41:31,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:41:31,164 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:41:31,203 WARN L424 MainDispatcher]: Unable to annotate unsigned with a witness entry Start Parsing Local Start Parsing Local [2024-01-31 16:41:31,228 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] Start Parsing Local [2024-01-31 16:41:31,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:41:31,253 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:41:31,254 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31 WrapperNode [2024-01-31 16:41:31,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:41:31,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:41:31,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:41:31,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:41:31,261 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 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,282 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 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,294 INFO L138 Inliner]: procedures = 164, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2024-01-31 16:41:31,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:41:31,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:41:31,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:41:31,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:41:31,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,305 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,316 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 5, 1]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-01-31 16:41:31,317 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,317 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,322 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:41:31,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:41:31,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:41:31,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:41:31,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (1/1) ... [2024-01-31 16:41:31,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:41:31,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:31,351 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) [2024-01-31 16:41:31,358 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 [2024-01-31 16:41:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:41:31,395 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:41:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:41:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:41:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:41:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:41:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:41:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:41:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:41:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:41:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:41:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:41:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:41:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:41:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:41:31,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:41:31,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:41:31,399 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:41:31,504 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:41:31,506 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:41:31,659 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:41:31,660 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:41:31,750 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:41:31,752 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-31 16:41:31,753 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:41:31 BoogieIcfgContainer [2024-01-31 16:41:31,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:41:31,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:41:31,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:41:31,758 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:41:31,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:41:30" (1/4) ... [2024-01-31 16:41:31,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf1deb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:41:31, skipping insertion in model container [2024-01-31 16:41:31,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:41:30" (2/4) ... [2024-01-31 16:41:31,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf1deb6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:41:31, skipping insertion in model container [2024-01-31 16:41:31,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:41:31" (3/4) ... [2024-01-31 16:41:31,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf1deb6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:41:31, skipping insertion in model container [2024-01-31 16:41:31,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:41:31" (4/4) ... [2024-01-31 16:41:31,760 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc-pthread.i [2024-01-31 16:41:31,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:41:31,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-01-31 16:41:31,778 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:41:31,840 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:41:31,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 23 transitions, 50 flow [2024-01-31 16:41:31,902 INFO L124 PetriNetUnfolderBase]: 1/25 cut-off events. [2024-01-31 16:41:31,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:41:31,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 1/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-01-31 16:41:31,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 23 transitions, 50 flow [2024-01-31 16:41:31,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 50 flow [2024-01-31 16:41:31,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:41:31,928 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;@520e236e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:41:31,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-31 16:41:31,934 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:41:31,934 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-01-31 16:41:31,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:41:31,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:31,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-31 16:41:31,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-01-31 16:41:31,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash 989277224, now seen corresponding path program 1 times [2024-01-31 16:41:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:31,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632762571] [2024-01-31 16:41:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:41:32,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:41:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:41:32,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:41:32,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:41:32,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-01-31 16:41:32,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 9 remaining) [2024-01-31 16:41:32,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 9 remaining) [2024-01-31 16:41:32,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 9 remaining) [2024-01-31 16:41:32,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-01-31 16:41:32,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 9 remaining) [2024-01-31 16:41:32,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 9 remaining) [2024-01-31 16:41:32,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 9 remaining) [2024-01-31 16:41:32,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-01-31 16:41:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:41:32,142 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-31 16:41:32,144 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:41:32,144 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:41:32,172 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:41:32,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 41 transitions, 92 flow [2024-01-31 16:41:32,185 INFO L124 PetriNetUnfolderBase]: 2/46 cut-off events. [2024-01-31 16:41:32,185 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:41:32,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 46 events. 2/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 114 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-01-31 16:41:32,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 41 transitions, 92 flow [2024-01-31 16:41:32,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 92 flow [2024-01-31 16:41:32,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:41:32,192 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;@520e236e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:41:32,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-01-31 16:41:32,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:41:32,197 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2024-01-31 16:41:32,197 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:41:32,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:32,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:32,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-01-31 16:41:32,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash -601195259, now seen corresponding path program 1 times [2024-01-31 16:41:32,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:32,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982120458] [2024-01-31 16:41:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:32,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:32,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:32,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982120458] [2024-01-31 16:41:32,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982120458] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:32,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:41:32,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:41:32,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206705143] [2024-01-31 16:41:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:32,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:41:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:41:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:41:32,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-01-31 16:41:32,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 92 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2024-01-31 16:41:32,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:32,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-01-31 16:41:32,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:32,940 INFO L124 PetriNetUnfolderBase]: 478/982 cut-off events. [2024-01-31 16:41:32,940 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-01-31 16:41:32,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1831 conditions, 982 events. 478/982 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5564 event pairs, 68 based on Foata normal form. 0/802 useless extension candidates. Maximal degree in co-relation 1692. Up to 491 conditions per place. [2024-01-31 16:41:32,948 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 45 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-01-31 16:41:32,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 246 flow [2024-01-31 16:41:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:41:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:41:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-01-31 16:41:32,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-01-31 16:41:32,978 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 92 flow. Second operand 6 states and 122 transitions. [2024-01-31 16:41:32,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 246 flow [2024-01-31 16:41:32,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:41:32,987 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 120 flow [2024-01-31 16:41:32,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-01-31 16:41:32,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-01-31 16:41:32,993 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 120 flow [2024-01-31 16:41:32,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2024-01-31 16:41:32,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:32,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-31 16:41:32,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:41:32,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-01-31 16:41:32,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2008965260, now seen corresponding path program 1 times [2024-01-31 16:41:33,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:33,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860492306] [2024-01-31 16:41:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:33,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:41:33,024 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:41:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:41:33,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:41:33,043 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:41:33,044 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-01-31 16:41:33,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 13 remaining) [2024-01-31 16:41:33,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 13 remaining) [2024-01-31 16:41:33,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 13 remaining) [2024-01-31 16:41:33,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2024-01-31 16:41:33,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 13 remaining) [2024-01-31 16:41:33,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 13 remaining) [2024-01-31 16:41:33,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 13 remaining) [2024-01-31 16:41:33,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2024-01-31 16:41:33,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 13 remaining) [2024-01-31 16:41:33,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 13 remaining) [2024-01-31 16:41:33,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 13 remaining) [2024-01-31 16:41:33,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2024-01-31 16:41:33,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:41:33,046 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-31 16:41:33,047 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:41:33,047 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:41:33,078 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:41:33,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 59 transitions, 136 flow [2024-01-31 16:41:33,090 INFO L124 PetriNetUnfolderBase]: 3/67 cut-off events. [2024-01-31 16:41:33,090 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:41:33,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 3/67 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 209 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-01-31 16:41:33,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 59 transitions, 136 flow [2024-01-31 16:41:33,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 59 transitions, 136 flow [2024-01-31 16:41:33,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:41:33,096 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;@520e236e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:41:33,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-01-31 16:41:33,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:41:33,099 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2024-01-31 16:41:33,099 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 16:41:33,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:33,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:33,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:41:33,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2094338796, now seen corresponding path program 1 times [2024-01-31 16:41:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:33,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159884759] [2024-01-31 16:41:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:33,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:33,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159884759] [2024-01-31 16:41:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159884759] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:33,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:41:33,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:41:33,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244238036] [2024-01-31 16:41:33,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:33,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:41:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:41:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:41:33,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 59 [2024-01-31 16:41:33,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:33,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:33,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 59 [2024-01-31 16:41:33,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:34,821 INFO L124 PetriNetUnfolderBase]: 11894/18938 cut-off events. [2024-01-31 16:41:34,822 INFO L125 PetriNetUnfolderBase]: For 661/661 co-relation queries the response was YES. [2024-01-31 16:41:34,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36124 conditions, 18938 events. 11894/18938 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 141368 event pairs, 3309 based on Foata normal form. 0/14371 useless extension candidates. Maximal degree in co-relation 22490. Up to 14482 conditions per place. [2024-01-31 16:41:34,960 INFO L140 encePairwiseOnDemand]: 44/59 looper letters, 81 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-01-31 16:41:34,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 104 transitions, 439 flow [2024-01-31 16:41:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:41:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:41:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-01-31 16:41:34,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451977401129944 [2024-01-31 16:41:34,967 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 136 flow. Second operand 6 states and 193 transitions. [2024-01-31 16:41:34,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 104 transitions, 439 flow [2024-01-31 16:41:34,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 431 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-01-31 16:41:34,971 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 199 flow [2024-01-31 16:41:34,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=199, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-01-31 16:41:34,972 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-01-31 16:41:34,973 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 199 flow [2024-01-31 16:41:34,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:41:34,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:34,973 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:34,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:41:34,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:41:34,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash -917340067, now seen corresponding path program 1 times [2024-01-31 16:41:34,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:34,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407229462] [2024-01-31 16:41:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:34,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:41:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407229462] [2024-01-31 16:41:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407229462] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:41:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:41:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637239834] [2024-01-31 16:41:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:41:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:41:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:41:35,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 59 [2024-01-31 16:41:35,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-01-31 16:41:35,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:35,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 59 [2024-01-31 16:41:35,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:36,396 INFO L124 PetriNetUnfolderBase]: 9836/15857 cut-off events. [2024-01-31 16:41:36,397 INFO L125 PetriNetUnfolderBase]: For 3692/3701 co-relation queries the response was YES. [2024-01-31 16:41:36,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33412 conditions, 15857 events. 9836/15857 cut-off events. For 3692/3701 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 116984 event pairs, 3269 based on Foata normal form. 213/13604 useless extension candidates. Maximal degree in co-relation 23869. Up to 12020 conditions per place. [2024-01-31 16:41:36,486 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 84 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-01-31 16:41:36,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 111 transitions, 541 flow [2024-01-31 16:41:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:41:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:41:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-01-31 16:41:36,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943502824858757 [2024-01-31 16:41:36,488 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 199 flow. Second operand 6 states and 175 transitions. [2024-01-31 16:41:36,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 111 transitions, 541 flow [2024-01-31 16:41:36,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:41:36,500 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 299 flow [2024-01-31 16:41:36,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-01-31 16:41:36,501 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2024-01-31 16:41:36,502 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 299 flow [2024-01-31 16:41:36,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-01-31 16:41:36,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:36,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:36,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:41:36,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:41:36,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash 543180009, now seen corresponding path program 1 times [2024-01-31 16:41:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:36,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944024525] [2024-01-31 16:41:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:36,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:36,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:36,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944024525] [2024-01-31 16:41:36,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944024525] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:36,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:41:36,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:41:36,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687279876] [2024-01-31 16:41:36,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:36,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:41:36,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:36,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:41:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:41:36,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 59 [2024-01-31 16:41:36,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 299 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-01-31 16:41:36,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:36,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 59 [2024-01-31 16:41:36,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:38,367 INFO L124 PetriNetUnfolderBase]: 14408/23267 cut-off events. [2024-01-31 16:41:38,367 INFO L125 PetriNetUnfolderBase]: For 9575/9615 co-relation queries the response was YES. [2024-01-31 16:41:38,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51998 conditions, 23267 events. 14408/23267 cut-off events. For 9575/9615 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 182639 event pairs, 5354 based on Foata normal form. 363/21061 useless extension candidates. Maximal degree in co-relation 51834. Up to 9812 conditions per place. [2024-01-31 16:41:38,679 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 120 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2024-01-31 16:41:38,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 153 transitions, 841 flow [2024-01-31 16:41:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:41:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:41:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-01-31 16:41:38,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5932203389830508 [2024-01-31 16:41:38,681 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 299 flow. Second operand 6 states and 210 transitions. [2024-01-31 16:41:38,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 153 transitions, 841 flow [2024-01-31 16:41:38,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 153 transitions, 822 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-31 16:41:38,707 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 396 flow [2024-01-31 16:41:38,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-01-31 16:41:38,709 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-01-31 16:41:38,709 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 396 flow [2024-01-31 16:41:38,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-01-31 16:41:38,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:38,710 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-31 16:41:38,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:41:38,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:41:38,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:38,711 INFO L85 PathProgramCache]: Analyzing trace with hash 573065159, now seen corresponding path program 1 times [2024-01-31 16:41:38,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:38,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151081175] [2024-01-31 16:41:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:41:38,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:41:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:41:38,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:41:38,738 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:41:38,738 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 17 remaining) [2024-01-31 16:41:38,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-01-31 16:41:38,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-01-31 16:41:38,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 17 remaining) [2024-01-31 16:41:38,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (12 of 17 remaining) [2024-01-31 16:41:38,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-01-31 16:41:38,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-01-31 16:41:38,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (8 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (4 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-01-31 16:41:38,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-01-31 16:41:38,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (0 of 17 remaining) [2024-01-31 16:41:38,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:41:38,742 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-31 16:41:38,743 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:41:38,743 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 16:41:38,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:41:38,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 77 transitions, 182 flow [2024-01-31 16:41:38,788 INFO L124 PetriNetUnfolderBase]: 4/88 cut-off events. [2024-01-31 16:41:38,788 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 16:41:38,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 88 events. 4/88 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 298 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-01-31 16:41:38,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 77 transitions, 182 flow [2024-01-31 16:41:38,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 77 transitions, 182 flow [2024-01-31 16:41:38,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:41:38,791 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;@520e236e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:41:38,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-01-31 16:41:38,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:41:38,794 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2024-01-31 16:41:38,794 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 16:41:38,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:38,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:38,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-01-31 16:41:38,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1357222388, now seen corresponding path program 1 times [2024-01-31 16:41:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219406208] [2024-01-31 16:41:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:38,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:38,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219406208] [2024-01-31 16:41:38,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219406208] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:41:38,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:41:38,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:41:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909291760] [2024-01-31 16:41:38,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:41:38,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:41:38,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:41:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:41:38,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2024-01-31 16:41:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-01-31 16:41:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2024-01-31 16:41:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:59,266 INFO L124 PetriNetUnfolderBase]: 245281/345878 cut-off events. [2024-01-31 16:41:59,266 INFO L125 PetriNetUnfolderBase]: For 16403/16403 co-relation queries the response was YES. [2024-01-31 16:41:59,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667922 conditions, 345878 events. 245281/345878 cut-off events. For 16403/16403 co-relation queries the response was YES. Maximal size of possible extension queue 13261. Compared 2908290 event pairs, 88046 based on Foata normal form. 0/254598 useless extension candidates. Maximal degree in co-relation 190135. Up to 299489 conditions per place. [2024-01-31 16:42:01,637 INFO L140 encePairwiseOnDemand]: 59/77 looper letters, 109 selfloop transitions, 13 changer transitions 0/139 dead transitions. [2024-01-31 16:42:01,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 608 flow [2024-01-31 16:42:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 255 transitions. [2024-01-31 16:42:01,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-01-31 16:42:01,639 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 182 flow. Second operand 6 states and 255 transitions. [2024-01-31 16:42:01,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 608 flow [2024-01-31 16:42:01,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 139 transitions, 584 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:01,652 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 262 flow [2024-01-31 16:42:01,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2024-01-31 16:42:01,653 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2024-01-31 16:42:01,653 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 262 flow [2024-01-31 16:42:01,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-01-31 16:42:01,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:01,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:42:01,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err3ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-01-31 16:42:01,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash 190472359, now seen corresponding path program 1 times [2024-01-31 16:42:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:01,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666833197] [2024-01-31 16:42:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:01,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:01,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666833197] [2024-01-31 16:42:01,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666833197] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:01,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:01,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:42:01,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773851864] [2024-01-31 16:42:01,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:01,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:42:01,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:42:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:42:01,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 77 [2024-01-31 16:42:01,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-01-31 16:42:01,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:01,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 77 [2024-01-31 16:42:01,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand