./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-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/48_ticket_lock_low_contention_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 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/48_ticket_lock_low_contention_vs-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/48_ticket_lock_low_contention_vs-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:02:09,547 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:02:09,679 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:02:09,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:02:09,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:02:09,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:02:09,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:02:09,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:02:09,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:02:09,727 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:02:09,727 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:02:09,727 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:02:09,729 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:02:09,730 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:02:09,730 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:02:09,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:02:09,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:02:09,731 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:02:09,731 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:02:09,731 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:02:09,731 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:02:09,732 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:02:09,732 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:02:09,732 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:02:09,732 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:02:09,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:02:09,733 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:02:09,733 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:02:09,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:02:09,734 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:02:09,735 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:02:09,735 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:02:09,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:02:09,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:02:09,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:02:09,736 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:02:09,736 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:02:09,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:02:09,736 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:02:09,736 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:02:09,737 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:02:09,737 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:02:09,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:02:09,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:02:10,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:02:10,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:02:10,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:02:10,174 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:02:10,175 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:02:10,176 INFO L431 ainManager$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/48_ticket_lock_low_contention_vs-pthread.yml/witness.yml [2024-01-31 16:02:10,400 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:02:10,401 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:02:10,403 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-01-31 16:02:11,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:02:12,075 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:02:12,075 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-01-31 16:02:12,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2651e7f03/8a7de806a3e54f4a8872a6e3d47ef43e/FLAG098e44ba4 [2024-01-31 16:02:12,117 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2651e7f03/8a7de806a3e54f4a8872a6e3d47ef43e [2024-01-31 16:02:12,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:02:12,123 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:02:12,123 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:02:12,124 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:02:12,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:02:12,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:02:10" (1/2) ... [2024-01-31 16:02:12,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b655006 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:02:12, skipping insertion in model container [2024-01-31 16:02:12,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:02:10" (1/2) ... [2024-01-31 16:02:12,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11a9536d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:02:12, skipping insertion in model container [2024-01-31 16:02:12,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:02:12" (2/2) ... [2024-01-31 16:02:12,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b655006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12, skipping insertion in model container [2024-01-31 16:02:12,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:02:12" (2/2) ... [2024-01-31 16:02:12,142 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:02:12,193 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:02:12,194 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:12,194 INFO L98 nessWitnessExtractor]: Location invariant before [L692-L692] (unsigned long )arg == 0UL [2024-01-31 16:02:12,194 INFO L98 nessWitnessExtractor]: Location invariant before [L695-L695] (unsigned long )arg == 0UL [2024-01-31 16:02:12,194 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:12,195 INFO L98 nessWitnessExtractor]: Location invariant after [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:12,195 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] (c == 0U) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:12,195 INFO L98 nessWitnessExtractor]: Location invariant after [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:12,195 INFO L98 nessWitnessExtractor]: Location invariant before [L694-L694] (c == 0U) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:12,239 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:02:12,581 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/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2024-01-31 16:02:12,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:02:12,598 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:02:12,651 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/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] Start Parsing Local [2024-01-31 16:02:12,652 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry Start Parsing Local Start Parsing Local [2024-01-31 16:02:12,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:02:12,681 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:02:12,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12 WrapperNode [2024-01-31 16:02:12,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:02:12,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:02:12,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:02:12,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:02:12,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,714 INFO L138 Inliner]: procedures = 165, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-01-31 16:02:12,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:02:12,715 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:02:12,715 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:02:12,716 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:02:12,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,738 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,754 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 16:02:12,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,762 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,763 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,764 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,766 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:02:12,767 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:02:12,767 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:02:12,767 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:02:12,768 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (1/1) ... [2024-01-31 16:02:12,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:02:12,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:02:12,862 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 16:02:12,864 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 16:02:12,919 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:02:12,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:02:12,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:02:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:02:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:02:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:02:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:02:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:02:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:02:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:02:12,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:02:12,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:02:12,923 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:02:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:02:12,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:02:12,925 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 16:02:13,056 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:02:13,059 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:02:13,274 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:02:13,275 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:02:13,341 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:02:13,341 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-31 16:02:13,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:02:13 BoogieIcfgContainer [2024-01-31 16:02:13,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:02:13,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:02:13,344 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:02:13,350 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:02:13,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:02:10" (1/4) ... [2024-01-31 16:02:13,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1309119d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:02:13, skipping insertion in model container [2024-01-31 16:02:13,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:02:12" (2/4) ... [2024-01-31 16:02:13,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1309119d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:02:13, skipping insertion in model container [2024-01-31 16:02:13,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:12" (3/4) ... [2024-01-31 16:02:13,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1309119d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:02:13, skipping insertion in model container [2024-01-31 16:02:13,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:02:13" (4/4) ... [2024-01-31 16:02:13,353 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2024-01-31 16:02:13,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:02:13,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-01-31 16:02:13,368 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:02:13,399 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:13,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 49 transitions, 102 flow [2024-01-31 16:02:13,448 INFO L124 PetriNetUnfolderBase]: 5/74 cut-off events. [2024-01-31 16:02:13,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:13,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 74 events. 5/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 233 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2024-01-31 16:02:13,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 49 transitions, 102 flow [2024-01-31 16:02:13,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 49 transitions, 102 flow [2024-01-31 16:02:13,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:13,467 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;@cca05d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:13,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-01-31 16:02:13,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:13,470 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-01-31 16:02:13,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:13,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:02:13,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-01-31 16:02:13,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 7608694, now seen corresponding path program 1 times [2024-01-31 16:02:13,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:13,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342696386] [2024-01-31 16:02:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:13,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:13,642 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 16:02:13,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:13,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342696386] [2024-01-31 16:02:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342696386] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:13,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665549096] [2024-01-31 16:02:13,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:13,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 16:02:13,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 16:02:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 16:02:13,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 49 [2024-01-31 16:02:13,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:13,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:13,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 49 [2024-01-31 16:02:13,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:13,785 INFO L124 PetriNetUnfolderBase]: 45/234 cut-off events. [2024-01-31 16:02:13,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:13,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 234 events. 45/234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1209 event pairs, 45 based on Foata normal form. 14/200 useless extension candidates. Maximal degree in co-relation 307. Up to 116 conditions per place. [2024-01-31 16:02:13,788 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 16 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2024-01-31 16:02:13,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 128 flow [2024-01-31 16:02:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 16:02:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 16:02:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 79 transitions. [2024-01-31 16:02:13,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8061224489795918 [2024-01-31 16:02:13,806 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 102 flow. Second operand 2 states and 79 transitions. [2024-01-31 16:02:13,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 128 flow [2024-01-31 16:02:13,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:13,810 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 96 flow [2024-01-31 16:02:13,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-01-31 16:02:13,814 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2024-01-31 16:02:13,815 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 96 flow [2024-01-31 16:02:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:13,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:02:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:02:13,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-01-31 16:02:13,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash 235923074, now seen corresponding path program 1 times [2024-01-31 16:02:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804256797] [2024-01-31 16:02:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:13,966 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 16:02:13,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:13,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804256797] [2024-01-31 16:02:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804256797] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:13,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230594543] [2024-01-31 16:02:13,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:13,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 49 [2024-01-31 16:02:13,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 16:02:13,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:13,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 49 [2024-01-31 16:02:13,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:14,037 INFO L124 PetriNetUnfolderBase]: 45/220 cut-off events. [2024-01-31 16:02:14,037 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:14,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 220 events. 45/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1118 event pairs, 20 based on Foata normal form. 7/186 useless extension candidates. Maximal degree in co-relation 337. Up to 60 conditions per place. [2024-01-31 16:02:14,039 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 19 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-01-31 16:02:14,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 144 flow [2024-01-31 16:02:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-01-31 16:02:14,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-01-31 16:02:14,041 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 96 flow. Second operand 3 states and 107 transitions. [2024-01-31 16:02:14,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 144 flow [2024-01-31 16:02:14,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:14,043 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 96 flow [2024-01-31 16:02:14,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-01-31 16:02:14,044 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2024-01-31 16:02:14,045 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 96 flow [2024-01-31 16:02:14,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 16:02:14,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:14,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:14,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:02:14,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-01-31 16:02:14,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1276240831, now seen corresponding path program 1 times [2024-01-31 16:02:14,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:14,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806436619] [2024-01-31 16:02:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:14,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:14,169 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 16:02:14,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:14,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806436619] [2024-01-31 16:02:14,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806436619] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:14,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:14,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:14,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475587541] [2024-01-31 16:02:14,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:14,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:14,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:14,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 49 [2024-01-31 16:02:14,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 16:02:14,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:14,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 49 [2024-01-31 16:02:14,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:14,329 INFO L124 PetriNetUnfolderBase]: 54/279 cut-off events. [2024-01-31 16:02:14,330 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-01-31 16:02:14,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 279 events. 54/279 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1484 event pairs, 0 based on Foata normal form. 10/245 useless extension candidates. Maximal degree in co-relation 431. Up to 114 conditions per place. [2024-01-31 16:02:14,332 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 31 selfloop transitions, 2 changer transitions 2/60 dead transitions. [2024-01-31 16:02:14,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 206 flow [2024-01-31 16:02:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-01-31 16:02:14,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7397959183673469 [2024-01-31 16:02:14,334 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 96 flow. Second operand 4 states and 145 transitions. [2024-01-31 16:02:14,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 206 flow [2024-01-31 16:02:14,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:14,336 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 92 flow [2024-01-31 16:02:14,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-01-31 16:02:14,337 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-01-31 16:02:14,337 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 92 flow [2024-01-31 16:02:14,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 16:02:14,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:14,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-01-31 16:02:14,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:02:14,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-01-31 16:02:14,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash -908787816, now seen corresponding path program 1 times [2024-01-31 16:02:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:14,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546827796] [2024-01-31 16:02:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:14,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:14,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:14,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:14,393 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:14,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-01-31 16:02:14,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 22 remaining) [2024-01-31 16:02:14,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 22 remaining) [2024-01-31 16:02:14,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 22 remaining) [2024-01-31 16:02:14,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (17 of 22 remaining) [2024-01-31 16:02:14,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 22 remaining) [2024-01-31 16:02:14,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 22 remaining) [2024-01-31 16:02:14,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 22 remaining) [2024-01-31 16:02:14,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 22 remaining) [2024-01-31 16:02:14,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 22 remaining) [2024-01-31 16:02:14,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 22 remaining) [2024-01-31 16:02:14,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (10 of 22 remaining) [2024-01-31 16:02:14,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 22 remaining) [2024-01-31 16:02:14,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 22 remaining) [2024-01-31 16:02:14,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 22 remaining) [2024-01-31 16:02:14,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 22 remaining) [2024-01-31 16:02:14,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 22 remaining) [2024-01-31 16:02:14,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 22 remaining) [2024-01-31 16:02:14,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (3 of 22 remaining) [2024-01-31 16:02:14,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 22 remaining) [2024-01-31 16:02:14,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 22 remaining) [2024-01-31 16:02:14,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 22 remaining) [2024-01-31 16:02:14,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:02:14,404 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-31 16:02:14,408 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:14,411 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:02:14,450 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:14,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 152 flow [2024-01-31 16:02:14,537 INFO L124 PetriNetUnfolderBase]: 8/121 cut-off events. [2024-01-31 16:02:14,540 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:02:14,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 121 events. 8/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 506 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 76. Up to 6 conditions per place. [2024-01-31 16:02:14,541 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 71 transitions, 152 flow [2024-01-31 16:02:14,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 152 flow [2024-01-31 16:02:14,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:14,550 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;@cca05d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:14,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-01-31 16:02:14,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:14,551 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-01-31 16:02:14,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:14,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:14,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:02:14,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:14,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash 9794358, now seen corresponding path program 1 times [2024-01-31 16:02:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:14,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935379489] [2024-01-31 16:02:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:14,596 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 16:02:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:14,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935379489] [2024-01-31 16:02:14,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935379489] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:14,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:14,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:14,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482293996] [2024-01-31 16:02:14,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:14,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 16:02:14,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 16:02:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 16:02:14,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-01-31 16:02:14,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 152 flow. Second operand has 2 states, 2 states have (on average 46.5) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:14,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:14,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-01-31 16:02:14,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:14,749 INFO L124 PetriNetUnfolderBase]: 615/1788 cut-off events. [2024-01-31 16:02:14,749 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-01-31 16:02:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2857 conditions, 1788 events. 615/1788 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 14418 event pairs, 615 based on Foata normal form. 152/1634 useless extension candidates. Maximal degree in co-relation 433. Up to 1046 conditions per place. [2024-01-31 16:02:14,762 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 22 selfloop transitions, 0 changer transitions 0/67 dead transitions. [2024-01-31 16:02:14,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 188 flow [2024-01-31 16:02:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 16:02:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 16:02:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 116 transitions. [2024-01-31 16:02:14,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8169014084507042 [2024-01-31 16:02:14,764 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 152 flow. Second operand 2 states and 116 transitions. [2024-01-31 16:02:14,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 188 flow [2024-01-31 16:02:14,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:14,766 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 144 flow [2024-01-31 16:02:14,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-01-31 16:02:14,767 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-01-31 16:02:14,767 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 144 flow [2024-01-31 16:02:14,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 46.5) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:14,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:14,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:02:14,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:02:14,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:14,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash 303678729, now seen corresponding path program 1 times [2024-01-31 16:02:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:14,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266680757] [2024-01-31 16:02:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:14,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:14,821 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 16:02:14,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:14,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266680757] [2024-01-31 16:02:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266680757] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:14,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:14,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:14,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139022438] [2024-01-31 16:02:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:14,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:14,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 71 [2024-01-31 16:02:14,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 16:02:14,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:14,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 71 [2024-01-31 16:02:14,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:15,002 INFO L124 PetriNetUnfolderBase]: 615/1702 cut-off events. [2024-01-31 16:02:15,003 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-01-31 16:02:15,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 1702 events. 615/1702 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13377 event pairs, 290 based on Foata normal form. 43/1482 useless extension candidates. Maximal degree in co-relation 2767. Up to 540 conditions per place. [2024-01-31 16:02:15,014 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 30 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-31 16:02:15,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 224 flow [2024-01-31 16:02:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-01-31 16:02:15,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7652582159624414 [2024-01-31 16:02:15,016 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 144 flow. Second operand 3 states and 163 transitions. [2024-01-31 16:02:15,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 224 flow [2024-01-31 16:02:15,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:15,018 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 144 flow [2024-01-31 16:02:15,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-01-31 16:02:15,019 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-01-31 16:02:15,019 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 144 flow [2024-01-31 16:02:15,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 16:02:15,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:15,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:15,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:02:15,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:15,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash 824205398, now seen corresponding path program 1 times [2024-01-31 16:02:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548551654] [2024-01-31 16:02:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:15,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:15,074 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 16:02:15,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:15,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548551654] [2024-01-31 16:02:15,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548551654] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:15,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:15,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016465834] [2024-01-31 16:02:15,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:15,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:15,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 71 [2024-01-31 16:02:15,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 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 16:02:15,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:15,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 71 [2024-01-31 16:02:15,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:15,336 INFO L124 PetriNetUnfolderBase]: 729/2300 cut-off events. [2024-01-31 16:02:15,337 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-01-31 16:02:15,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3658 conditions, 2300 events. 729/2300 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 19386 event pairs, 455 based on Foata normal form. 70/2004 useless extension candidates. Maximal degree in co-relation 3652. Up to 1104 conditions per place. [2024-01-31 16:02:15,353 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 43 selfloop transitions, 2 changer transitions 2/87 dead transitions. [2024-01-31 16:02:15,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 295 flow [2024-01-31 16:02:15,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2024-01-31 16:02:15,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7640845070422535 [2024-01-31 16:02:15,355 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 144 flow. Second operand 4 states and 217 transitions. [2024-01-31 16:02:15,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 295 flow [2024-01-31 16:02:15,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:15,361 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 140 flow [2024-01-31 16:02:15,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-01-31 16:02:15,362 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2024-01-31 16:02:15,363 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 140 flow [2024-01-31 16:02:15,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 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 16:02:15,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:15,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:02:15,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:15,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1692176227, now seen corresponding path program 1 times [2024-01-31 16:02:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:15,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197438913] [2024-01-31 16:02:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:15,456 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 16:02:15,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:15,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197438913] [2024-01-31 16:02:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197438913] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:15,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:15,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710965854] [2024-01-31 16:02:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:15,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:15,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:15,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2024-01-31 16:02:15,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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 16:02:15,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:15,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2024-01-31 16:02:15,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:16,003 INFO L124 PetriNetUnfolderBase]: 2271/5910 cut-off events. [2024-01-31 16:02:16,004 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-01-31 16:02:16,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10077 conditions, 5910 events. 2271/5910 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 56963 event pairs, 726 based on Foata normal form. 654/6077 useless extension candidates. Maximal degree in co-relation 10071. Up to 2016 conditions per place. [2024-01-31 16:02:16,034 INFO L140 encePairwiseOnDemand]: 52/71 looper letters, 53 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-01-31 16:02:16,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 349 flow [2024-01-31 16:02:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2024-01-31 16:02:16,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7605633802816901 [2024-01-31 16:02:16,036 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 140 flow. Second operand 4 states and 216 transitions. [2024-01-31 16:02:16,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 349 flow [2024-01-31 16:02:16,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:16,038 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 241 flow [2024-01-31 16:02:16,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-01-31 16:02:16,039 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-01-31 16:02:16,039 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 241 flow [2024-01-31 16:02:16,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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 16:02:16,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:16,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-01-31 16:02:16,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:02:16,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:16,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash -471577214, now seen corresponding path program 1 times [2024-01-31 16:02:16,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:16,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839824357] [2024-01-31 16:02:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:16,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:02:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:16,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839824357] [2024-01-31 16:02:16,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839824357] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:16,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:16,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:16,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772946515] [2024-01-31 16:02:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:16,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:16,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:16,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:16,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 71 [2024-01-31 16:02:16,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:16,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:16,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 71 [2024-01-31 16:02:16,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:16,615 INFO L124 PetriNetUnfolderBase]: 1633/5070 cut-off events. [2024-01-31 16:02:16,616 INFO L125 PetriNetUnfolderBase]: For 1649/1822 co-relation queries the response was YES. [2024-01-31 16:02:16,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10472 conditions, 5070 events. 1633/5070 cut-off events. For 1649/1822 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 51509 event pairs, 533 based on Foata normal form. 106/4811 useless extension candidates. Maximal degree in co-relation 10464. Up to 2193 conditions per place. [2024-01-31 16:02:16,645 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 69 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-01-31 16:02:16,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 111 transitions, 527 flow [2024-01-31 16:02:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-01-31 16:02:16,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.778169014084507 [2024-01-31 16:02:16,647 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 241 flow. Second operand 4 states and 221 transitions. [2024-01-31 16:02:16,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 111 transitions, 527 flow [2024-01-31 16:02:16,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:16,649 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 241 flow [2024-01-31 16:02:16,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-01-31 16:02:16,650 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-01-31 16:02:16,650 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 241 flow [2024-01-31 16:02:16,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:16,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:16,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:16,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:02:16,651 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:16,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash 917855796, now seen corresponding path program 1 times [2024-01-31 16:02:16,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:16,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41617599] [2024-01-31 16:02:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:16,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:16,701 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 16:02:16,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41617599] [2024-01-31 16:02:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41617599] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:16,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:16,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100977901] [2024-01-31 16:02:16,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:16,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:16,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2024-01-31 16:02:16,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 16:02:16,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:16,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2024-01-31 16:02:16,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:17,499 INFO L124 PetriNetUnfolderBase]: 3228/7612 cut-off events. [2024-01-31 16:02:17,499 INFO L125 PetriNetUnfolderBase]: For 3061/3305 co-relation queries the response was YES. [2024-01-31 16:02:17,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17382 conditions, 7612 events. 3228/7612 cut-off events. For 3061/3305 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 72817 event pairs, 1329 based on Foata normal form. 625/7946 useless extension candidates. Maximal degree in co-relation 17373. Up to 3237 conditions per place. [2024-01-31 16:02:17,554 INFO L140 encePairwiseOnDemand]: 55/71 looper letters, 53 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-01-31 16:02:17,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 463 flow [2024-01-31 16:02:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2024-01-31 16:02:17,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7077464788732394 [2024-01-31 16:02:17,556 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 241 flow. Second operand 4 states and 201 transitions. [2024-01-31 16:02:17,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 463 flow [2024-01-31 16:02:17,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:17,565 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 365 flow [2024-01-31 16:02:17,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-01-31 16:02:17,567 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-01-31 16:02:17,567 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 365 flow [2024-01-31 16:02:17,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 16:02:17,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:17,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:17,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:02:17,568 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:17,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash -424674809, now seen corresponding path program 1 times [2024-01-31 16:02:17,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:17,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147190801] [2024-01-31 16:02:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:17,658 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 16:02:17,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:17,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147190801] [2024-01-31 16:02:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147190801] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:17,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:17,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307643580] [2024-01-31 16:02:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:17,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2024-01-31 16:02:17,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 16:02:17,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:17,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2024-01-31 16:02:17,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:19,027 INFO L124 PetriNetUnfolderBase]: 4489/10631 cut-off events. [2024-01-31 16:02:19,028 INFO L125 PetriNetUnfolderBase]: For 10181/10204 co-relation queries the response was YES. [2024-01-31 16:02:19,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28918 conditions, 10631 events. 4489/10631 cut-off events. For 10181/10204 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 104171 event pairs, 1530 based on Foata normal form. 261/10439 useless extension candidates. Maximal degree in co-relation 28907. Up to 3517 conditions per place. [2024-01-31 16:02:19,272 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 64 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2024-01-31 16:02:19,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 700 flow [2024-01-31 16:02:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 203 transitions. [2024-01-31 16:02:19,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7147887323943662 [2024-01-31 16:02:19,274 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 365 flow. Second operand 4 states and 203 transitions. [2024-01-31 16:02:19,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 700 flow [2024-01-31 16:02:19,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:19,280 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 512 flow [2024-01-31 16:02:19,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-01-31 16:02:19,281 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2024-01-31 16:02:19,281 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 512 flow [2024-01-31 16:02:19,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 16:02:19,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:19,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2024-01-31 16:02:19,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:02:19,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:02:19,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:19,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1734019373, now seen corresponding path program 1 times [2024-01-31 16:02:19,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:19,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942635942] [2024-01-31 16:02:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:19,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:19,290 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:19,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:19,298 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:19,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2024-01-31 16:02:19,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-01-31 16:02:19,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-01-31 16:02:19,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-01-31 16:02:19,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (24 of 29 remaining) [2024-01-31 16:02:19,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 29 remaining) [2024-01-31 16:02:19,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-01-31 16:02:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-01-31 16:02:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-01-31 16:02:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-01-31 16:02:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-01-31 16:02:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (17 of 29 remaining) [2024-01-31 16:02:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 29 remaining) [2024-01-31 16:02:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 29 remaining) [2024-01-31 16:02:19,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 29 remaining) [2024-01-31 16:02:19,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 29 remaining) [2024-01-31 16:02:19,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 29 remaining) [2024-01-31 16:02:19,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-01-31 16:02:19,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (10 of 29 remaining) [2024-01-31 16:02:19,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 29 remaining) [2024-01-31 16:02:19,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (3 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-01-31 16:02:19,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 29 remaining) [2024-01-31 16:02:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:02:19,303 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:19,303 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:19,303 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:02:19,321 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 93 transitions, 204 flow [2024-01-31 16:02:19,332 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2024-01-31 16:02:19,332 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:02:19,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 11/168 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 814 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 127. Up to 8 conditions per place. [2024-01-31 16:02:19,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 93 transitions, 204 flow [2024-01-31 16:02:19,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 93 transitions, 204 flow [2024-01-31 16:02:19,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:19,335 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;@cca05d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:19,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-01-31 16:02:19,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:19,337 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-01-31 16:02:19,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:19,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:19,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:02:19,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:02:19,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash 12657270, now seen corresponding path program 1 times [2024-01-31 16:02:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:19,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419180087] [2024-01-31 16:02:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:19,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:19,345 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 16:02:19,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419180087] [2024-01-31 16:02:19,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419180087] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:19,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:19,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233004523] [2024-01-31 16:02:19,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:19,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 16:02:19,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 16:02:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 16:02:19,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 93 [2024-01-31 16:02:19,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 61.5) internal successors, (123), 2 states have internal predecessors, (123), 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 16:02:19,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:19,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 93 [2024-01-31 16:02:19,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:20,521 INFO L124 PetriNetUnfolderBase]: 5835/12912 cut-off events. [2024-01-31 16:02:20,521 INFO L125 PetriNetUnfolderBase]: For 762/762 co-relation queries the response was YES. [2024-01-31 16:02:20,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21506 conditions, 12912 events. 5835/12912 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 125669 event pairs, 5835 based on Foata normal form. 1340/12398 useless extension candidates. Maximal degree in co-relation 2858. Up to 8426 conditions per place. [2024-01-31 16:02:20,630 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 28 selfloop transitions, 0 changer transitions 0/88 dead transitions. [2024-01-31 16:02:20,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 250 flow [2024-01-31 16:02:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 16:02:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 16:02:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 153 transitions. [2024-01-31 16:02:20,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8225806451612904 [2024-01-31 16:02:20,632 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 204 flow. Second operand 2 states and 153 transitions. [2024-01-31 16:02:20,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 250 flow [2024-01-31 16:02:20,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 88 transitions, 248 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:20,634 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 192 flow [2024-01-31 16:02:20,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-01-31 16:02:20,635 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 1 predicate places. [2024-01-31 16:02:20,636 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 192 flow [2024-01-31 16:02:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 61.5) internal successors, (123), 2 states have internal predecessors, (123), 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 16:02:20,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:20,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:02:20,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:02:20,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:02:20,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash 392429094, now seen corresponding path program 1 times [2024-01-31 16:02:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:20,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510832934] [2024-01-31 16:02:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:20,689 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 16:02:20,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:20,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510832934] [2024-01-31 16:02:20,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510832934] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:20,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:20,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:20,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757495554] [2024-01-31 16:02:20,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:20,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:20,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:20,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:20,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 93 [2024-01-31 16:02:20,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 16:02:20,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:20,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 93 [2024-01-31 16:02:20,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:21,852 INFO L124 PetriNetUnfolderBase]: 5835/12394 cut-off events. [2024-01-31 16:02:21,853 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-01-31 16:02:21,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20953 conditions, 12394 events. 5835/12394 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 116987 event pairs, 2810 based on Foata normal form. 259/11058 useless extension candidates. Maximal degree in co-relation 20947. Up to 4320 conditions per place. [2024-01-31 16:02:21,920 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 41 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2024-01-31 16:02:21,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 101 transitions, 304 flow [2024-01-31 16:02:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-01-31 16:02:21,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7849462365591398 [2024-01-31 16:02:21,922 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 192 flow. Second operand 3 states and 219 transitions. [2024-01-31 16:02:21,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 101 transitions, 304 flow [2024-01-31 16:02:21,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:21,924 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 192 flow [2024-01-31 16:02:21,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2024-01-31 16:02:21,925 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 1 predicate places. [2024-01-31 16:02:21,925 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 192 flow [2024-01-31 16:02:21,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 16:02:21,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:21,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:02:21,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:02:21,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:21,926 INFO L85 PathProgramCache]: Analyzing trace with hash -719480309, now seen corresponding path program 1 times [2024-01-31 16:02:21,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:21,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055235590] [2024-01-31 16:02:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:21,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:21,975 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 16:02:21,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:21,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055235590] [2024-01-31 16:02:21,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055235590] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:21,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:21,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703659590] [2024-01-31 16:02:21,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:21,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:21,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:21,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:21,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 93 [2024-01-31 16:02:21,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 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 16:02:21,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:21,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 93 [2024-01-31 16:02:21,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:23,227 INFO L124 PetriNetUnfolderBase]: 6879/16670 cut-off events. [2024-01-31 16:02:23,227 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2024-01-31 16:02:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27329 conditions, 16670 events. 6879/16670 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 173810 event pairs, 5135 based on Foata normal form. 430/14974 useless extension candidates. Maximal degree in co-relation 27322. Up to 8844 conditions per place. [2024-01-31 16:02:23,333 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 55 selfloop transitions, 2 changer transitions 2/114 dead transitions. [2024-01-31 16:02:23,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 114 transitions, 384 flow [2024-01-31 16:02:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2024-01-31 16:02:23,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7768817204301075 [2024-01-31 16:02:23,460 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 192 flow. Second operand 4 states and 289 transitions. [2024-01-31 16:02:23,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 114 transitions, 384 flow [2024-01-31 16:02:23,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 114 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:23,466 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 188 flow [2024-01-31 16:02:23,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-01-31 16:02:23,467 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 0 predicate places. [2024-01-31 16:02:23,467 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 188 flow [2024-01-31 16:02:23,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 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 16:02:23,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:23,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:23,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 16:02:23,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:02:23,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -45462045, now seen corresponding path program 1 times [2024-01-31 16:02:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:23,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170628637] [2024-01-31 16:02:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:23,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:23,530 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 16:02:23,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170628637] [2024-01-31 16:02:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170628637] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:23,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078272477] [2024-01-31 16:02:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:23,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 93 [2024-01-31 16:02:23,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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 16:02:23,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:23,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 93 [2024-01-31 16:02:23,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:29,317 INFO L124 PetriNetUnfolderBase]: 32261/67799 cut-off events. [2024-01-31 16:02:29,317 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2024-01-31 16:02:29,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117840 conditions, 67799 events. 32261/67799 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 2938. Compared 802725 event pairs, 11813 based on Foata normal form. 10437/73347 useless extension candidates. Maximal degree in co-relation 117833. Up to 25995 conditions per place. [2024-01-31 16:02:29,818 INFO L140 encePairwiseOnDemand]: 70/93 looper letters, 67 selfloop transitions, 17 changer transitions 0/128 dead transitions. [2024-01-31 16:02:29,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 454 flow [2024-01-31 16:02:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2024-01-31 16:02:29,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.782258064516129 [2024-01-31 16:02:29,820 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 188 flow. Second operand 4 states and 291 transitions. [2024-01-31 16:02:29,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 454 flow [2024-01-31 16:02:29,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 128 transitions, 451 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:29,823 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 312 flow [2024-01-31 16:02:29,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-01-31 16:02:29,825 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 3 predicate places. [2024-01-31 16:02:29,825 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 312 flow [2024-01-31 16:02:29,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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 16:02:29,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:29,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-01-31 16:02:29,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 16:02:29,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:02:29,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2097444991, now seen corresponding path program 1 times [2024-01-31 16:02:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:29,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560779801] [2024-01-31 16:02:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:29,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:02:29,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560779801] [2024-01-31 16:02:29,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560779801] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:29,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844276873] [2024-01-31 16:02:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:29,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:29,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:29,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 93 [2024-01-31 16:02:29,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 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 16:02:29,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:29,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 93 [2024-01-31 16:02:29,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:34,351 INFO L124 PetriNetUnfolderBase]: 23662/58986 cut-off events. [2024-01-31 16:02:34,351 INFO L125 PetriNetUnfolderBase]: For 18034/20702 co-relation queries the response was YES. [2024-01-31 16:02:34,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124000 conditions, 58986 events. 23662/58986 cut-off events. For 18034/20702 co-relation queries the response was YES. Maximal size of possible extension queue 2713. Compared 771609 event pairs, 5954 based on Foata normal form. 1199/56213 useless extension candidates. Maximal degree in co-relation 123991. Up to 28440 conditions per place. [2024-01-31 16:02:35,006 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 85 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-01-31 16:02:35,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 662 flow [2024-01-31 16:02:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2024-01-31 16:02:35,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7876344086021505 [2024-01-31 16:02:35,008 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 312 flow. Second operand 4 states and 293 transitions. [2024-01-31 16:02:35,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 662 flow [2024-01-31 16:02:35,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 662 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:35,011 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 312 flow [2024-01-31 16:02:35,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2024-01-31 16:02:35,012 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 4 predicate places. [2024-01-31 16:02:35,012 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 312 flow [2024-01-31 16:02:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 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 16:02:35,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:35,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:35,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 16:02:35,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:02:35,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1409322991, now seen corresponding path program 1 times [2024-01-31 16:02:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:35,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114102660] [2024-01-31 16:02:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:35,058 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 16:02:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:35,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114102660] [2024-01-31 16:02:35,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114102660] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:35,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:35,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573544308] [2024-01-31 16:02:35,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:35,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:35,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 93 [2024-01-31 16:02:35,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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 16:02:35,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:35,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 93 [2024-01-31 16:02:35,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:44,637 INFO L124 PetriNetUnfolderBase]: 57787/113560 cut-off events. [2024-01-31 16:02:44,637 INFO L125 PetriNetUnfolderBase]: For 41406/45698 co-relation queries the response was YES. [2024-01-31 16:02:45,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258405 conditions, 113560 events. 57787/113560 cut-off events. For 41406/45698 co-relation queries the response was YES. Maximal size of possible extension queue 4879. Compared 1354281 event pairs, 22589 based on Foata normal form. 8288/118110 useless extension candidates. Maximal degree in co-relation 258395. Up to 48072 conditions per place. [2024-01-31 16:02:45,652 INFO L140 encePairwiseOnDemand]: 73/93 looper letters, 71 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-01-31 16:02:45,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 613 flow [2024-01-31 16:02:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2024-01-31 16:02:45,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.739247311827957 [2024-01-31 16:02:45,656 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 312 flow. Second operand 4 states and 275 transitions. [2024-01-31 16:02:45,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 613 flow [2024-01-31 16:02:45,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 610 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:45,661 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 478 flow [2024-01-31 16:02:45,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=478, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2024-01-31 16:02:45,662 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 7 predicate places. [2024-01-31 16:02:45,662 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 478 flow [2024-01-31 16:02:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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 16:02:45,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:45,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:45,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-31 16:02:45,663 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:02:45,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2144325871, now seen corresponding path program 1 times [2024-01-31 16:02:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:45,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155791424] [2024-01-31 16:02:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:45,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:45,735 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 16:02:45,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155791424] [2024-01-31 16:02:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155791424] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:45,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:45,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742471213] [2024-01-31 16:02:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:45,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 93 [2024-01-31 16:02:45,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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 16:02:45,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:45,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 93 [2024-01-31 16:02:45,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:03:01,228 INFO L124 PetriNetUnfolderBase]: 83235/164875 cut-off events. [2024-01-31 16:03:01,228 INFO L125 PetriNetUnfolderBase]: For 160443/161075 co-relation queries the response was YES. [2024-01-31 16:03:02,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450266 conditions, 164875 events. 83235/164875 cut-off events. For 160443/161075 co-relation queries the response was YES. Maximal size of possible extension queue 6615. Compared 2036617 event pairs, 30473 based on Foata normal form. 2724/159183 useless extension candidates. Maximal degree in co-relation 450254. Up to 60713 conditions per place. [2024-01-31 16:03:02,938 INFO L140 encePairwiseOnDemand]: 79/93 looper letters, 80 selfloop transitions, 33 changer transitions 0/156 dead transitions. [2024-01-31 16:03:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 923 flow [2024-01-31 16:03:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:03:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:03:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2024-01-31 16:03:02,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7338709677419355 [2024-01-31 16:03:02,959 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 478 flow. Second operand 4 states and 273 transitions. [2024-01-31 16:03:02,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 923 flow [2024-01-31 16:03:03,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 915 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:03:03,074 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 686 flow [2024-01-31 16:03:03,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=686, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-01-31 16:03:03,074 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 11 predicate places. [2024-01-31 16:03:03,074 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 686 flow [2024-01-31 16:03:03,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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 16:03:03,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:03:03,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:03:03,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:03:03,075 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:03:03,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:03:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2049593006, now seen corresponding path program 1 times [2024-01-31 16:03:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:03:03,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316478744] [2024-01-31 16:03:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:03:03,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:03:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:03:03,117 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 16:03:03,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:03:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316478744] [2024-01-31 16:03:03,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316478744] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:03:03,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:03:03,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:03:03,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386973906] [2024-01-31 16:03:03,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:03:03,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:03:03,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:03:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:03:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:03:03,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 93 [2024-01-31 16:03:03,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 686 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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 16:03:03,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:03:03,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 93 [2024-01-31 16:03:03,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand