./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.2024-02-07_10-47-16.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 e7c74aec 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.2024-02-07_10-47-16.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.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:02:51,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:02:51,581 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:02:51,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:02:51,588 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:02:51,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:02:51,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:02:51,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:02:51,617 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:02:51,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:02:51,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:02:51,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:02:51,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:02:51,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:02:51,623 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:02:51,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:02:51,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:02:51,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:02:51,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:02:51,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:02:51,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:02:51,626 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:02:51,626 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:02:51,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:02:51,627 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:02:51,627 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:02:51,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:02:51,627 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:02:51,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:02:51,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:02:51,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:02:51,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:02:51,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:02:51,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:02:51,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:02:51,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:02:51,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:02:51,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:02:51,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:02:51,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:02:51,631 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:02:51,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:02:51,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:02:51,632 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:02:51,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:02:51,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:02:51,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:02:51,911 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:02:51,911 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:02:51,912 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/48_ticket_lock_low_contention_vs-pthread.yml/witness.yml [2024-02-07 19:02:52,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:02:52,025 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:02:52,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-02-07 19:02:53,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:02:53,445 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:02:53,448 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-02-07 19:02:53,466 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e810445fd/f7c22068643b4b6c9f56f824483b4525/FLAGa602d2265 [2024-02-07 19:02:53,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e810445fd/f7c22068643b4b6c9f56f824483b4525 [2024-02-07 19:02:53,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:02:53,481 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:02:53,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:02:53,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:02:53,487 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:02:53,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:52" (1/2) ... [2024-02-07 19:02:53,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76282f56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:53, skipping insertion in model container [2024-02-07 19:02:53,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:52" (1/2) ... [2024-02-07 19:02:53,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a40b0f5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:53, skipping insertion in model container [2024-02-07 19:02:53,490 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:02:53" (2/2) ... [2024-02-07 19:02:53,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76282f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53, skipping insertion in model container [2024-02-07 19:02:53,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:02:53" (2/2) ... [2024-02-07 19:02:53,491 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:02:53,507 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:02:53,508 INFO L76 edCorrectnessWitness]: Location invariant before [L694-L694] c == 0U [2024-02-07 19:02:53,509 INFO L76 edCorrectnessWitness]: Location invariant before [L693-L693] c == 1U [2024-02-07 19:02:53,545 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:02:53,812 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] [2024-02-07 19:02:53,819 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:02:53,830 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:02:53,885 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 [2024-02-07 19:02:53,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:02:53,921 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:02:53,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53 WrapperNode [2024-02-07 19:02:53,922 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:02:53,923 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:02:53,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:02:53,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:02:53,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:53,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:53,995 INFO L138 Inliner]: procedures = 165, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-02-07 19:02:53,996 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:02:53,996 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:02:53,997 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:02:53,997 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:02:54,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,007 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,016 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 1, 5]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 1 writes are split as follows [0, 1, 0]. [2024-02-07 19:02:54,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,021 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,031 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,033 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:02:54,035 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:02:54,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:02:54,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:02:54,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (1/1) ... [2024-02-07 19:02:54,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:02:54,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:02:54,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:02:54,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:02:54,117 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-07 19:02:54,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-07 19:02:54,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:02:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:02:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:02:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 19:02:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:02:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:02:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:02:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:02:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:02:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:02:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 19:02:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:02:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:02:54,122 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:02:54,252 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:02:54,256 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:02:54,381 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:02:54,382 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:02:54,454 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:02:54,454 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-07 19:02:54,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:02:54 BoogieIcfgContainer [2024-02-07 19:02:54,455 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:02:54,456 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:02:54,457 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:02:54,459 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:02:54,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:52" (1/4) ... [2024-02-07 19:02:54,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7218949b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:02:54, skipping insertion in model container [2024-02-07 19:02:54,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:02:53" (2/4) ... [2024-02-07 19:02:54,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7218949b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:02:54, skipping insertion in model container [2024-02-07 19:02:54,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:53" (3/4) ... [2024-02-07 19:02:54,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7218949b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:02:54, skipping insertion in model container [2024-02-07 19:02:54,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:02:54" (4/4) ... [2024-02-07 19:02:54,461 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2024-02-07 19:02:54,474 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:02:54,474 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-02-07 19:02:54,474 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:02:54,525 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:54,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 35 transitions, 74 flow [2024-02-07 19:02:54,593 INFO L124 PetriNetUnfolderBase]: 5/53 cut-off events. [2024-02-07 19:02:54,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:54,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 143 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2024-02-07 19:02:54,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 35 transitions, 74 flow [2024-02-07 19:02:54,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 35 transitions, 74 flow [2024-02-07 19:02:54,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:54,627 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;@68a25869, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:54,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2024-02-07 19:02:54,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:54,641 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-02-07 19:02:54,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:54,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:54,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 19:02:54,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 7 more)] === [2024-02-07 19:02:54,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2110463200, now seen corresponding path program 1 times [2024-02-07 19:02:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:54,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189142318] [2024-02-07 19:02:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:54,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:54,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189142318] [2024-02-07 19:02:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189142318] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:54,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:54,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377017057] [2024-02-07 19:02:54,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 19:02:54,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 19:02:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 19:02:54,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-02-07 19:02:54,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:54,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:54,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-02-07 19:02:54,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:55,025 INFO L124 PetriNetUnfolderBase]: 32/177 cut-off events. [2024-02-07 19:02:55,026 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:55,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 177 events. 32/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 878 event pairs, 32 based on Foata normal form. 13/148 useless extension candidates. Maximal degree in co-relation 233. Up to 87 conditions per place. [2024-02-07 19:02:55,029 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 14 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2024-02-07 19:02:55,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 96 flow [2024-02-07 19:02:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 19:02:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 19:02:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 53 transitions. [2024-02-07 19:02:55,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7571428571428571 [2024-02-07 19:02:55,040 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 74 flow. Second operand 2 states and 53 transitions. [2024-02-07 19:02:55,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 96 flow [2024-02-07 19:02:55,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:55,044 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 68 flow [2024-02-07 19:02:55,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-02-07 19:02:55,050 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2024-02-07 19:02:55,050 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 68 flow [2024-02-07 19:02:55,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:55,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:55,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-02-07 19:02:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:02:55,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 7 more)] === [2024-02-07 19:02:55,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1040974905, now seen corresponding path program 1 times [2024-02-07 19:02:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002640515] [2024-02-07 19:02:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:55,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:55,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:55,124 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:55,125 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2024-02-07 19:02:55,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 10 remaining) [2024-02-07 19:02:55,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2024-02-07 19:02:55,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 10 remaining) [2024-02-07 19:02:55,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 10 remaining) [2024-02-07 19:02:55,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2024-02-07 19:02:55,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 10 remaining) [2024-02-07 19:02:55,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 10 remaining) [2024-02-07 19:02:55,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2024-02-07 19:02:55,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 10 remaining) [2024-02-07 19:02:55,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:02:55,134 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 19:02:55,137 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:55,137 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 19:02:55,155 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:55,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 50 transitions, 110 flow [2024-02-07 19:02:55,165 INFO L124 PetriNetUnfolderBase]: 8/86 cut-off events. [2024-02-07 19:02:55,166 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:02:55,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 86 events. 8/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 303 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2024-02-07 19:02:55,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 50 transitions, 110 flow [2024-02-07 19:02:55,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 50 transitions, 110 flow [2024-02-07 19:02:55,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:55,169 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;@68a25869, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:55,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-02-07 19:02:55,172 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:55,172 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-02-07 19:02:55,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:55,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:55,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 19:02:55,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:02:55,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash -705331296, now seen corresponding path program 1 times [2024-02-07 19:02:55,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:55,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244600222] [2024-02-07 19:02:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:55,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:55,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244600222] [2024-02-07 19:02:55,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244600222] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:55,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:55,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840590184] [2024-02-07 19:02:55,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:55,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 19:02:55,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 19:02:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 19:02:55,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 50 [2024-02-07 19:02:55,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 110 flow. Second operand has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:55,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:55,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 50 [2024-02-07 19:02:55,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:55,318 INFO L124 PetriNetUnfolderBase]: 372/1162 cut-off events. [2024-02-07 19:02:55,318 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-07 19:02:55,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1834 conditions, 1162 events. 372/1162 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8823 event pairs, 372 based on Foata normal form. 102/1009 useless extension candidates. Maximal degree in co-relation 1215. Up to 652 conditions per place. [2024-02-07 19:02:55,328 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 19 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2024-02-07 19:02:55,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 140 flow [2024-02-07 19:02:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 19:02:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 19:02:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2024-02-07 19:02:55,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.77 [2024-02-07 19:02:55,330 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 110 flow. Second operand 2 states and 77 transitions. [2024-02-07 19:02:55,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 140 flow [2024-02-07 19:02:55,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:55,352 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 102 flow [2024-02-07 19:02:55,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=102, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-02-07 19:02:55,353 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-02-07 19:02:55,353 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 102 flow [2024-02-07 19:02:55,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:55,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:55,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:55,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:02:55,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:02:55,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash -351081527, now seen corresponding path program 1 times [2024-02-07 19:02:55,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:55,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11285401] [2024-02-07 19:02:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:55,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:55,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11285401] [2024-02-07 19:02:55,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11285401] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:55,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:55,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:55,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732587399] [2024-02-07 19:02:55,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:55,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:55,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:55,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-02-07 19:02:55,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:55,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:55,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-02-07 19:02:55,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:55,829 INFO L124 PetriNetUnfolderBase]: 1760/3689 cut-off events. [2024-02-07 19:02:55,829 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-02-07 19:02:55,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6668 conditions, 3689 events. 1760/3689 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28230 event pairs, 1272 based on Foata normal form. 601/4186 useless extension candidates. Maximal degree in co-relation 6663. Up to 2430 conditions per place. [2024-02-07 19:02:55,848 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 45 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2024-02-07 19:02:55,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 249 flow [2024-02-07 19:02:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-02-07 19:02:55,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-02-07 19:02:55,852 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 102 flow. Second operand 3 states and 105 transitions. [2024-02-07 19:02:55,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 249 flow [2024-02-07 19:02:55,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 249 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:55,855 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 168 flow [2024-02-07 19:02:55,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-02-07 19:02:55,857 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-02-07 19:02:55,857 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 168 flow [2024-02-07 19:02:55,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:55,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:55,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2024-02-07 19:02:55,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:02:55,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:02:55,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2946801, now seen corresponding path program 1 times [2024-02-07 19:02:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:55,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877861650] [2024-02-07 19:02:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:55,889 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:55,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:55,915 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:55,916 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-02-07 19:02:55,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 13 remaining) [2024-02-07 19:02:55,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2024-02-07 19:02:55,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 13 remaining) [2024-02-07 19:02:55,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 13 remaining) [2024-02-07 19:02:55,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2024-02-07 19:02:55,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 13 remaining) [2024-02-07 19:02:55,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 13 remaining) [2024-02-07 19:02:55,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2024-02-07 19:02:55,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 13 remaining) [2024-02-07 19:02:55,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 13 remaining) [2024-02-07 19:02:55,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2024-02-07 19:02:55,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 13 remaining) [2024-02-07 19:02:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:02:55,921 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-07 19:02:55,922 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:55,923 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 19:02:55,946 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:55,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 148 flow [2024-02-07 19:02:55,959 INFO L124 PetriNetUnfolderBase]: 11/119 cut-off events. [2024-02-07 19:02:55,959 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 19:02:55,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 119 events. 11/119 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 487 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 92. Up to 8 conditions per place. [2024-02-07 19:02:55,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 65 transitions, 148 flow [2024-02-07 19:02:55,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 148 flow [2024-02-07 19:02:55,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:55,965 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;@68a25869, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:55,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-02-07 19:02:55,967 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:55,969 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-02-07 19:02:55,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:55,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:55,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 19:02:55,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 19:02:55,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1217593344, now seen corresponding path program 1 times [2024-02-07 19:02:55,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:55,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409752516] [2024-02-07 19:02:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:55,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:56,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:56,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409752516] [2024-02-07 19:02:56,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409752516] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:56,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:56,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:56,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365748680] [2024-02-07 19:02:56,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:56,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 19:02:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 19:02:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 19:02:56,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 65 [2024-02-07 19:02:56,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:56,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:56,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 65 [2024-02-07 19:02:56,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:56,588 INFO L124 PetriNetUnfolderBase]: 2972/6699 cut-off events. [2024-02-07 19:02:56,588 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-02-07 19:02:56,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11197 conditions, 6699 events. 2972/6699 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 60219 event pairs, 2972 based on Foata normal form. 741/6177 useless extension candidates. Maximal degree in co-relation 2477. Up to 4377 conditions per place. [2024-02-07 19:02:56,638 INFO L140 encePairwiseOnDemand]: 60/65 looper letters, 24 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2024-02-07 19:02:56,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 186 flow [2024-02-07 19:02:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 19:02:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 19:02:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2024-02-07 19:02:56,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7769230769230769 [2024-02-07 19:02:56,642 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 148 flow. Second operand 2 states and 101 transitions. [2024-02-07 19:02:56,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 186 flow [2024-02-07 19:02:56,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 184 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:56,646 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 136 flow [2024-02-07 19:02:56,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-02-07 19:02:56,649 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-02-07 19:02:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 136 flow [2024-02-07 19:02:56,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:56,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:56,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:56,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:02:56,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 19:02:56,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash -869959766, now seen corresponding path program 1 times [2024-02-07 19:02:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:56,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917780253] [2024-02-07 19:02:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:56,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:56,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917780253] [2024-02-07 19:02:56,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917780253] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:56,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:56,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:02:56,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313076692] [2024-02-07 19:02:56,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:56,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:56,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:56,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 65 [2024-02-07 19:02:56,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:02:56,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:56,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 65 [2024-02-07 19:02:56,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:03:00,023 INFO L124 PetriNetUnfolderBase]: 28144/49088 cut-off events. [2024-02-07 19:03:00,023 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2024-02-07 19:03:00,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89932 conditions, 49088 events. 28144/49088 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 2400. Compared 465067 event pairs, 19658 based on Foata normal form. 8281/56204 useless extension candidates. Maximal degree in co-relation 89926. Up to 32338 conditions per place. [2024-02-07 19:03:00,387 INFO L140 encePairwiseOnDemand]: 45/65 looper letters, 58 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2024-02-07 19:03:00,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 330 flow [2024-02-07 19:03:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:03:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:03:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-02-07 19:03:00,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7076923076923077 [2024-02-07 19:03:00,405 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 136 flow. Second operand 3 states and 138 transitions. [2024-02-07 19:03:00,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 330 flow [2024-02-07 19:03:00,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 86 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:03:00,407 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 224 flow [2024-02-07 19:03:00,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-02-07 19:03:00,409 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-02-07 19:03:00,409 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 224 flow [2024-02-07 19:03:00,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:03:00,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:03:00,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:03:00,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:03:00,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 19:03:00,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:03:00,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1138399699, now seen corresponding path program 1 times [2024-02-07 19:03:00,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:03:00,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970160830] [2024-02-07 19:03:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:03:00,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:03:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:03:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:03:00,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:03:00,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970160830] [2024-02-07 19:03:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970160830] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:03:00,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:03:00,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:03:00,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734747602] [2024-02-07 19:03:00,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:03:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:03:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:03:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:03:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:03:00,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 65 [2024-02-07 19:03:00,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:03:00,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:03:00,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 65 [2024-02-07 19:03:00,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:03:08,227 INFO L124 PetriNetUnfolderBase]: 58523/96783 cut-off events. [2024-02-07 19:03:08,227 INFO L125 PetriNetUnfolderBase]: For 40324/40324 co-relation queries the response was YES. [2024-02-07 19:03:08,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231227 conditions, 96783 events. 58523/96783 cut-off events. For 40324/40324 co-relation queries the response was YES. Maximal size of possible extension queue 3786. Compared 909742 event pairs, 30242 based on Foata normal form. 12277/104023 useless extension candidates. Maximal degree in co-relation 231219. Up to 49222 conditions per place. [2024-02-07 19:03:09,491 INFO L140 encePairwiseOnDemand]: 44/65 looper letters, 57 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-02-07 19:03:09,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 402 flow [2024-02-07 19:03:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:03:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:03:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-02-07 19:03:09,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7076923076923077 [2024-02-07 19:03:09,512 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 224 flow. Second operand 3 states and 138 transitions. [2024-02-07 19:03:09,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 402 flow [2024-02-07 19:03:09,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:03:09,672 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 259 flow [2024-02-07 19:03:09,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-02-07 19:03:09,674 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2024-02-07 19:03:09,674 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 259 flow [2024-02-07 19:03:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:03:09,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:03:09,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2024-02-07 19:03:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:03:09,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 19:03:09,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:03:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash 247960267, now seen corresponding path program 1 times [2024-02-07 19:03:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:03:09,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258268156] [2024-02-07 19:03:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:03:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:03:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:03:09,705 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:03:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:03:09,733 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:03:09,734 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:03:09,734 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-02-07 19:03:09,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 16 remaining) [2024-02-07 19:03:09,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (13 of 16 remaining) [2024-02-07 19:03:09,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 16 remaining) [2024-02-07 19:03:09,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 16 remaining) [2024-02-07 19:03:09,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (10 of 16 remaining) [2024-02-07 19:03:09,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 16 remaining) [2024-02-07 19:03:09,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 16 remaining) [2024-02-07 19:03:09,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 16 remaining) [2024-02-07 19:03:09,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 16 remaining) [2024-02-07 19:03:09,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 16 remaining) [2024-02-07 19:03:09,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 16 remaining) [2024-02-07 19:03:09,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 16 remaining) [2024-02-07 19:03:09,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 16 remaining) [2024-02-07 19:03:09,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 16 remaining) [2024-02-07 19:03:09,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 16 remaining) [2024-02-07 19:03:09,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:03:09,743 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-02-07 19:03:09,744 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:03:09,744 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-07 19:03:09,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:03:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 188 flow [2024-02-07 19:03:09,824 INFO L124 PetriNetUnfolderBase]: 14/152 cut-off events. [2024-02-07 19:03:09,825 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-07 19:03:09,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 152 events. 14/152 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 651 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 130. Up to 10 conditions per place. [2024-02-07 19:03:09,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 80 transitions, 188 flow [2024-02-07 19:03:09,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 80 transitions, 188 flow [2024-02-07 19:03:09,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:03:09,829 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;@68a25869, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:03:09,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-02-07 19:03:09,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:03:09,833 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-02-07 19:03:09,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:03:09,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:03:09,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 19:03:09,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:03:09,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:03:09,843 INFO L85 PathProgramCache]: Analyzing trace with hash -710697472, now seen corresponding path program 1 times [2024-02-07 19:03:09,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:03:09,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922462784] [2024-02-07 19:03:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:03:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:03:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:03:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:03:09,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:03:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922462784] [2024-02-07 19:03:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922462784] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:03:09,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:03:09,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:03:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213310271] [2024-02-07 19:03:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:03:09,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 19:03:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:03:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 19:03:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 19:03:09,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2024-02-07 19:03:09,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 188 flow. Second operand has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:03:09,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:03:09,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2024-02-07 19:03:09,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:03:13,604 INFO L124 PetriNetUnfolderBase]: 20472/38480 cut-off events. [2024-02-07 19:03:13,604 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2024-02-07 19:03:13,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66729 conditions, 38480 events. 20472/38480 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 383883 event pairs, 20472 based on Foata normal form. 5007/37291 useless extension candidates. Maximal degree in co-relation 11317. Up to 27502 conditions per place. [2024-02-07 19:03:13,896 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 29 selfloop transitions, 0 changer transitions 0/74 dead transitions. [2024-02-07 19:03:13,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 74 transitions, 234 flow [2024-02-07 19:03:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 19:03:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 19:03:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 125 transitions. [2024-02-07 19:03:13,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.78125 [2024-02-07 19:03:13,898 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 188 flow. Second operand 2 states and 125 transitions. [2024-02-07 19:03:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 74 transitions, 234 flow [2024-02-07 19:03:13,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 228 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-02-07 19:03:13,902 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 170 flow [2024-02-07 19:03:13,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-02-07 19:03:13,903 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2024-02-07 19:03:13,903 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 170 flow [2024-02-07 19:03:13,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:03:13,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:03:13,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:03:13,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:03:13,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 16 more)] === [2024-02-07 19:03:13,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:03:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash -517432838, now seen corresponding path program 1 times [2024-02-07 19:03:13,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:03:13,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524113432] [2024-02-07 19:03:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:03:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:03:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:03:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:03:13,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:03:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524113432] [2024-02-07 19:03:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524113432] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:03:13,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:03:13,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:03:13,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439467183] [2024-02-07 19:03:13,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:03:13,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:03:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:03:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:03:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:03:14,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 80 [2024-02-07 19:03:14,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:03:14,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:03:14,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 80 [2024-02-07 19:03:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand