./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/14_spin2003-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b 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/14_spin2003-pthread.i ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/14_spin2003-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-d8006e4-m [2024-02-05 10:26:03,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:26:03,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:26:03,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:26:03,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:26:03,603 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:26:03,603 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:26:03,604 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:26:03,605 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:26:03,608 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:26:03,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:26:03,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:26:03,609 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:26:03,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:26:03,610 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:26:03,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:26:03,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:26:03,611 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:26:03,611 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:26:03,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:26:03,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:26:03,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:26:03,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:26:03,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:26:03,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:26:03,614 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:26:03,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:26:03,614 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:26:03,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:26:03,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:26:03,616 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:26:03,616 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:26:03,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:26:03,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:26:03,617 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:26:03,617 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:26:03,617 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:26:03,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:26:03,617 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:26:03,618 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:26:03,618 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:26:03,618 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:26:03,618 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:26:03,618 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:26:03,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:26:03,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:26:03,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:26:03,930 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:26:03,931 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:26:03,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2024-02-05 10:26:05,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:26:05,246 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:26:05,247 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2024-02-05 10:26:05,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9593a9df3/77032717422240918bfd4143538db5a6/FLAGd9c817af9 [2024-02-05 10:26:05,268 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9593a9df3/77032717422240918bfd4143538db5a6 [2024-02-05 10:26:05,270 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:26:05,271 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:26:05,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/14_spin2003-pthread.yml/witness.yml [2024-02-05 10:26:05,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:26:05,344 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:26:05,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:26:05,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:26:05,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:26:05,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:26:05" (1/2) ... [2024-02-05 10:26:05,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4065cd4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:05, skipping insertion in model container [2024-02-05 10:26:05,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:26:05" (1/2) ... [2024-02-05 10:26:05,353 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38183ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:05, skipping insertion in model container [2024-02-05 10:26:05,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:05" (2/2) ... [2024-02-05 10:26:05,353 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4065cd4e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05, skipping insertion in model container [2024-02-05 10:26:05,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:05" (2/2) ... [2024-02-05 10:26:05,353 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:26:05,379 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:26:05,381 INFO L101 nessWitnessExtractor]: Location invariant before [L692-L692] (x == 1) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:05,381 INFO L101 nessWitnessExtractor]: Location invariant before [L690-L690] (x == 0) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:05,381 INFO L101 nessWitnessExtractor]: Location invariant before [L689-L689] (x == 1) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:05,381 INFO L101 nessWitnessExtractor]: Location invariant before [L688-L688] (unsigned long )arg == 0UL [2024-02-05 10:26:05,382 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] (unsigned long )arg == 0UL [2024-02-05 10:26:05,382 INFO L101 nessWitnessExtractor]: Location invariant before [L691-L691] (x == 1) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:05,413 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:26:05,686 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/14_spin2003-pthread.i[30427,30440] [2024-02-05 10:26:05,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:26:05,702 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:26:05,762 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/14_spin2003-pthread.i[30427,30440] Start Parsing Local Start Parsing Local [2024-02-05 10:26:05,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:26:05,799 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:26:05,800 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05 WrapperNode [2024-02-05 10:26:05,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:26:05,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:26:05,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:26:05,802 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:26:05,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,866 INFO L138 Inliner]: procedures = 162, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2024-02-05 10:26:05,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:26:05,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:26:05,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:26:05,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:26:05,875 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,881 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,897 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 5, 1]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-02-05 10:26:05,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:26:05,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:26:05,949 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:26:05,949 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:26:05,950 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (1/1) ... [2024-02-05 10:26:05,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:26:05,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:26:06,016 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) [2024-02-05 10:26:06,054 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 [2024-02-05 10:26:06,072 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-05 10:26:06,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-05 10:26:06,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:26:06,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:26:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:26:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-05 10:26:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:26:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:26:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:26:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:26:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:26:06,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:26:06,075 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-05 10:26:06,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:26:06,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:26:06,077 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:26:06,172 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:26:06,174 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:26:06,347 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:26:06,349 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:26:06,398 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:26:06,398 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-05 10:26:06,399 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:26:06 BoogieIcfgContainer [2024-02-05 10:26:06,399 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:26:06,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:26:06,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:26:06,403 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:26:06,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:26:05" (1/4) ... [2024-02-05 10:26:06,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e922c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:26:06, skipping insertion in model container [2024-02-05 10:26:06,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:05" (2/4) ... [2024-02-05 10:26:06,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e922c6b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:26:06, skipping insertion in model container [2024-02-05 10:26:06,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:05" (3/4) ... [2024-02-05 10:26:06,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e922c6b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:26:06, skipping insertion in model container [2024-02-05 10:26:06,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:26:06" (4/4) ... [2024-02-05 10:26:06,406 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003-pthread.i [2024-02-05 10:26:06,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:26:06,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-02-05 10:26:06,420 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:26:06,454 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:06,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 26 transitions, 56 flow [2024-02-05 10:26:06,500 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2024-02-05 10:26:06,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:06,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 28 events. 1/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-02-05 10:26:06,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 26 transitions, 56 flow [2024-02-05 10:26:06,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 56 flow [2024-02-05 10:26:06,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:06,518 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;@6b654fda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:06,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-02-05 10:26:06,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:06,522 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-05 10:26:06,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:06,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:06,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:06,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-05 10:26:06,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:06,527 INFO L85 PathProgramCache]: Analyzing trace with hash 155365315, now seen corresponding path program 1 times [2024-02-05 10:26:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:06,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347666319] [2024-02-05 10:26:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:06,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:06,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347666319] [2024-02-05 10:26:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347666319] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:06,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:06,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:06,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072040545] [2024-02-05 10:26:06,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:06,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:06,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 26 [2024-02-05 10:26:06,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-02-05 10:26:06,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:06,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 26 [2024-02-05 10:26:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:06,907 INFO L124 PetriNetUnfolderBase]: 6/47 cut-off events. [2024-02-05 10:26:06,907 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:06,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 47 events. 6/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 4/45 useless extension candidates. Maximal degree in co-relation 62. Up to 18 conditions per place. [2024-02-05 10:26:06,909 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 9 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-02-05 10:26:06,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 74 flow [2024-02-05 10:26:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-05 10:26:06,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634615384615384 [2024-02-05 10:26:06,919 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 56 flow. Second operand 4 states and 69 transitions. [2024-02-05 10:26:06,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 74 flow [2024-02-05 10:26:06,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:06,924 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 52 flow [2024-02-05 10:26:06,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2024-02-05 10:26:06,928 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-02-05 10:26:06,928 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 52 flow [2024-02-05 10:26:06,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-02-05 10:26:06,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:06,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-05 10:26:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:26:06,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-05 10:26:06,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:06,931 INFO L85 PathProgramCache]: Analyzing trace with hash 155365087, now seen corresponding path program 1 times [2024-02-05 10:26:06,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:06,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192503650] [2024-02-05 10:26:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:06,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:06,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:26:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:07,006 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:26:07,011 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:26:07,012 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-02-05 10:26:07,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 15 remaining) [2024-02-05 10:26:07,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 15 remaining) [2024-02-05 10:26:07,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 15 remaining) [2024-02-05 10:26:07,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 15 remaining) [2024-02-05 10:26:07,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (9 of 15 remaining) [2024-02-05 10:26:07,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 15 remaining) [2024-02-05 10:26:07,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 15 remaining) [2024-02-05 10:26:07,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 15 remaining) [2024-02-05 10:26:07,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 15 remaining) [2024-02-05 10:26:07,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 15 remaining) [2024-02-05 10:26:07,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 15 remaining) [2024-02-05 10:26:07,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (2 of 15 remaining) [2024-02-05 10:26:07,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 15 remaining) [2024-02-05 10:26:07,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 15 remaining) [2024-02-05 10:26:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:26:07,019 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-05 10:26:07,022 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:26:07,022 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-05 10:26:07,046 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:07,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 48 transitions, 106 flow [2024-02-05 10:26:07,066 INFO L124 PetriNetUnfolderBase]: 2/52 cut-off events. [2024-02-05 10:26:07,067 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:26:07,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 52 events. 2/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 44. Up to 3 conditions per place. [2024-02-05 10:26:07,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 48 transitions, 106 flow [2024-02-05 10:26:07,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 48 transitions, 106 flow [2024-02-05 10:26:07,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:07,077 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;@6b654fda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:07,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-02-05 10:26:07,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:07,081 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-05 10:26:07,085 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:26:07,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:07,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:07,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-05 10:26:07,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash 201192808, now seen corresponding path program 1 times [2024-02-05 10:26:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918441281] [2024-02-05 10:26:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:07,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:07,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:07,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918441281] [2024-02-05 10:26:07,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918441281] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:07,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:07,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:07,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637442728] [2024-02-05 10:26:07,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:07,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:07,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:07,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 48 [2024-02-05 10:26:07,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2024-02-05 10:26:07,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:07,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 48 [2024-02-05 10:26:07,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:07,342 INFO L124 PetriNetUnfolderBase]: 113/446 cut-off events. [2024-02-05 10:26:07,343 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-02-05 10:26:07,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 446 events. 113/446 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2666 event pairs, 55 based on Foata normal form. 40/412 useless extension candidates. Maximal degree in co-relation 574. Up to 192 conditions per place. [2024-02-05 10:26:07,347 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 21 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-02-05 10:26:07,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 163 flow [2024-02-05 10:26:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-02-05 10:26:07,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7447916666666666 [2024-02-05 10:26:07,349 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 106 flow. Second operand 4 states and 143 transitions. [2024-02-05 10:26:07,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 163 flow [2024-02-05 10:26:07,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 163 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:07,350 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 100 flow [2024-02-05 10:26:07,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-02-05 10:26:07,351 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-02-05 10:26:07,351 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 100 flow [2024-02-05 10:26:07,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2024-02-05 10:26:07,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:07,352 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-02-05 10:26:07,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:26:07,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-05 10:26:07,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash 71922989, now seen corresponding path program 1 times [2024-02-05 10:26:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471620883] [2024-02-05 10:26:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:07,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:07,368 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:26:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:07,381 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:26:07,381 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:26:07,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-02-05 10:26:07,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 22 remaining) [2024-02-05 10:26:07,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 22 remaining) [2024-02-05 10:26:07,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 22 remaining) [2024-02-05 10:26:07,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 22 remaining) [2024-02-05 10:26:07,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (16 of 22 remaining) [2024-02-05 10:26:07,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 22 remaining) [2024-02-05 10:26:07,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 22 remaining) [2024-02-05 10:26:07,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 22 remaining) [2024-02-05 10:26:07,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 22 remaining) [2024-02-05 10:26:07,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 22 remaining) [2024-02-05 10:26:07,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 22 remaining) [2024-02-05 10:26:07,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (9 of 22 remaining) [2024-02-05 10:26:07,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 22 remaining) [2024-02-05 10:26:07,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 22 remaining) [2024-02-05 10:26:07,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 22 remaining) [2024-02-05 10:26:07,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 22 remaining) [2024-02-05 10:26:07,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 22 remaining) [2024-02-05 10:26:07,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 22 remaining) [2024-02-05 10:26:07,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (2 of 22 remaining) [2024-02-05 10:26:07,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 22 remaining) [2024-02-05 10:26:07,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 22 remaining) [2024-02-05 10:26:07,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:26:07,386 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-05 10:26:07,410 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:26:07,410 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-05 10:26:07,431 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:07,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 70 transitions, 158 flow [2024-02-05 10:26:07,439 INFO L124 PetriNetUnfolderBase]: 3/76 cut-off events. [2024-02-05 10:26:07,439 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-05 10:26:07,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 3/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 243 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2024-02-05 10:26:07,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 70 transitions, 158 flow [2024-02-05 10:26:07,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 70 transitions, 158 flow [2024-02-05 10:26:07,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:07,443 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;@6b654fda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:07,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-02-05 10:26:07,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:07,444 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-05 10:26:07,444 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:26:07,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:07,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:07,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:07,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:07,445 INFO L85 PathProgramCache]: Analyzing trace with hash 268014339, now seen corresponding path program 1 times [2024-02-05 10:26:07,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:07,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775252398] [2024-02-05 10:26:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:07,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:07,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775252398] [2024-02-05 10:26:07,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775252398] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:07,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:07,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415759732] [2024-02-05 10:26:07,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:07,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:07,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:07,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 70 [2024-02-05 10:26:07,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2024-02-05 10:26:07,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:07,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 70 [2024-02-05 10:26:07,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:07,837 INFO L124 PetriNetUnfolderBase]: 1175/3024 cut-off events. [2024-02-05 10:26:07,838 INFO L125 PetriNetUnfolderBase]: For 289/289 co-relation queries the response was YES. [2024-02-05 10:26:07,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4999 conditions, 3024 events. 1175/3024 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 25392 event pairs, 95 based on Foata normal form. 350/3010 useless extension candidates. Maximal degree in co-relation 2685. Up to 1596 conditions per place. [2024-02-05 10:26:07,854 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 33 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-02-05 10:26:07,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 256 flow [2024-02-05 10:26:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2024-02-05 10:26:07,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.775 [2024-02-05 10:26:07,857 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 158 flow. Second operand 4 states and 217 transitions. [2024-02-05 10:26:07,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 256 flow [2024-02-05 10:26:07,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 252 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:07,859 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 148 flow [2024-02-05 10:26:07,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2024-02-05 10:26:07,860 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-02-05 10:26:07,860 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 148 flow [2024-02-05 10:26:07,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 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) [2024-02-05 10:26:07,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:07,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-05 10:26:07,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:26:07,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:07,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash -137071188, now seen corresponding path program 1 times [2024-02-05 10:26:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:07,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363984246] [2024-02-05 10:26:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:07,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:26:07,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:07,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363984246] [2024-02-05 10:26:07,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363984246] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:07,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:07,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691098169] [2024-02-05 10:26:07,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:07,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:07,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:07,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 70 [2024-02-05 10:26:07,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2024-02-05 10:26:07,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:07,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 70 [2024-02-05 10:26:07,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:08,211 INFO L124 PetriNetUnfolderBase]: 1173/3009 cut-off events. [2024-02-05 10:26:08,211 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2024-02-05 10:26:08,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4938 conditions, 3009 events. 1173/3009 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 25045 event pairs, 100 based on Foata normal form. 84/2730 useless extension candidates. Maximal degree in co-relation 4921. Up to 1572 conditions per place. [2024-02-05 10:26:08,227 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 37 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-02-05 10:26:08,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 263 flow [2024-02-05 10:26:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 213 transitions. [2024-02-05 10:26:08,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7607142857142857 [2024-02-05 10:26:08,231 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 148 flow. Second operand 4 states and 213 transitions. [2024-02-05 10:26:08,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 263 flow [2024-02-05 10:26:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:08,235 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 145 flow [2024-02-05 10:26:08,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2024-02-05 10:26:08,237 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-02-05 10:26:08,238 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 145 flow [2024-02-05 10:26:08,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2024-02-05 10:26:08,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:08,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:26:08,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:08,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 71273777, now seen corresponding path program 1 times [2024-02-05 10:26:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:08,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416563854] [2024-02-05 10:26:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:08,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:08,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:08,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416563854] [2024-02-05 10:26:08,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416563854] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:08,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:08,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739660927] [2024-02-05 10:26:08,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:08,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:08,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2024-02-05 10:26:08,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2024-02-05 10:26:08,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:08,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2024-02-05 10:26:08,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:09,313 INFO L124 PetriNetUnfolderBase]: 6910/13650 cut-off events. [2024-02-05 10:26:09,314 INFO L125 PetriNetUnfolderBase]: For 657/657 co-relation queries the response was YES. [2024-02-05 10:26:09,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25123 conditions, 13650 events. 6910/13650 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 122493 event pairs, 2325 based on Foata normal form. 1770/14789 useless extension candidates. Maximal degree in co-relation 23529. Up to 5067 conditions per place. [2024-02-05 10:26:09,506 INFO L140 encePairwiseOnDemand]: 49/70 looper letters, 61 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-02-05 10:26:09,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 426 flow [2024-02-05 10:26:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-02-05 10:26:09,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7678571428571429 [2024-02-05 10:26:09,508 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 145 flow. Second operand 4 states and 215 transitions. [2024-02-05 10:26:09,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 426 flow [2024-02-05 10:26:09,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:09,510 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 294 flow [2024-02-05 10:26:09,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-02-05 10:26:09,511 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2024-02-05 10:26:09,511 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 294 flow [2024-02-05 10:26:09,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2024-02-05 10:26:09,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:09,512 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-02-05 10:26:09,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:26:09,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:09,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1417114940, now seen corresponding path program 1 times [2024-02-05 10:26:09,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:09,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350129423] [2024-02-05 10:26:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:09,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:09,522 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:26:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:09,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:26:09,531 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:26:09,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2024-02-05 10:26:09,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-02-05 10:26:09,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-02-05 10:26:09,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-02-05 10:26:09,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 29 remaining) [2024-02-05 10:26:09,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (23 of 29 remaining) [2024-02-05 10:26:09,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-02-05 10:26:09,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-02-05 10:26:09,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-02-05 10:26:09,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-02-05 10:26:09,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-02-05 10:26:09,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 29 remaining) [2024-02-05 10:26:09,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (16 of 29 remaining) [2024-02-05 10:26:09,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 29 remaining) [2024-02-05 10:26:09,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 29 remaining) [2024-02-05 10:26:09,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 29 remaining) [2024-02-05 10:26:09,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 29 remaining) [2024-02-05 10:26:09,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-02-05 10:26:09,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 29 remaining) [2024-02-05 10:26:09,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (9 of 29 remaining) [2024-02-05 10:26:09,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-02-05 10:26:09,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-02-05 10:26:09,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-02-05 10:26:09,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-02-05 10:26:09,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-02-05 10:26:09,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 29 remaining) [2024-02-05 10:26:09,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (2 of 29 remaining) [2024-02-05 10:26:09,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-02-05 10:26:09,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 29 remaining) [2024-02-05 10:26:09,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:26:09,536 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-02-05 10:26:09,536 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:26:09,536 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-05 10:26:09,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:09,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 92 transitions, 212 flow [2024-02-05 10:26:09,568 INFO L124 PetriNetUnfolderBase]: 4/100 cut-off events. [2024-02-05 10:26:09,568 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-05 10:26:09,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 100 events. 4/100 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 365 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 87. Up to 5 conditions per place. [2024-02-05 10:26:09,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 92 transitions, 212 flow [2024-02-05 10:26:09,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 92 transitions, 212 flow [2024-02-05 10:26:09,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:09,572 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;@6b654fda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:09,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-02-05 10:26:09,574 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:09,574 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-05 10:26:09,574 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:26:09,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:09,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:09,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:09,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:09,575 INFO L85 PathProgramCache]: Analyzing trace with hash 355831252, now seen corresponding path program 1 times [2024-02-05 10:26:09,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:09,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196781667] [2024-02-05 10:26:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:09,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:09,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196781667] [2024-02-05 10:26:09,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196781667] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:09,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:09,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613502938] [2024-02-05 10:26:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:09,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:09,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 92 [2024-02-05 10:26:09,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 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) [2024-02-05 10:26:09,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:09,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 92 [2024-02-05 10:26:09,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:11,510 INFO L124 PetriNetUnfolderBase]: 10067/21330 cut-off events. [2024-02-05 10:26:11,511 INFO L125 PetriNetUnfolderBase]: For 2908/2908 co-relation queries the response was YES. [2024-02-05 10:26:11,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36482 conditions, 21330 events. 10067/21330 cut-off events. For 2908/2908 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 216122 event pairs, 995 based on Foata normal form. 2678/21708 useless extension candidates. Maximal degree in co-relation 12790. Up to 12180 conditions per place. [2024-02-05 10:26:11,636 INFO L140 encePairwiseOnDemand]: 83/92 looper letters, 45 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2024-02-05 10:26:11,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 105 transitions, 353 flow [2024-02-05 10:26:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2024-02-05 10:26:11,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7907608695652174 [2024-02-05 10:26:11,638 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 212 flow. Second operand 4 states and 291 transitions. [2024-02-05 10:26:11,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 105 transitions, 353 flow [2024-02-05 10:26:11,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 105 transitions, 341 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:11,641 INFO L231 Difference]: Finished difference. Result has 97 places, 85 transitions, 196 flow [2024-02-05 10:26:11,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=97, PETRI_TRANSITIONS=85} [2024-02-05 10:26:11,642 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 0 predicate places. [2024-02-05 10:26:11,642 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 85 transitions, 196 flow [2024-02-05 10:26:11,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 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) [2024-02-05 10:26:11,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:11,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-05 10:26:11,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:26:11,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:11,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:11,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1644985710, now seen corresponding path program 1 times [2024-02-05 10:26:11,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:11,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003163382] [2024-02-05 10:26:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:11,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:26:11,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003163382] [2024-02-05 10:26:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003163382] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:11,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:11,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125727219] [2024-02-05 10:26:11,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:11,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:11,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 92 [2024-02-05 10:26:11,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 85 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 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) [2024-02-05 10:26:11,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:11,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 92 [2024-02-05 10:26:11,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:13,304 INFO L124 PetriNetUnfolderBase]: 10065/23150 cut-off events. [2024-02-05 10:26:13,305 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-02-05 10:26:13,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37752 conditions, 23150 events. 10065/23150 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 248606 event pairs, 4775 based on Foata normal form. 516/20529 useless extension candidates. Maximal degree in co-relation 37734. Up to 12156 conditions per place. [2024-02-05 10:26:13,422 INFO L140 encePairwiseOnDemand]: 88/92 looper letters, 49 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2024-02-05 10:26:13,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 107 transitions, 352 flow [2024-02-05 10:26:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 285 transitions. [2024-02-05 10:26:13,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7744565217391305 [2024-02-05 10:26:13,424 INFO L175 Difference]: Start difference. First operand has 97 places, 85 transitions, 196 flow. Second operand 4 states and 285 transitions. [2024-02-05 10:26:13,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 107 transitions, 352 flow [2024-02-05 10:26:13,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:13,427 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 193 flow [2024-02-05 10:26:13,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2024-02-05 10:26:13,429 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -1 predicate places. [2024-02-05 10:26:13,429 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 193 flow [2024-02-05 10:26:13,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 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) [2024-02-05 10:26:13,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:13,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:13,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:26:13,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:13,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash 589957905, now seen corresponding path program 1 times [2024-02-05 10:26:13,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:13,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880197945] [2024-02-05 10:26:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:13,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880197945] [2024-02-05 10:26:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880197945] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:13,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280321568] [2024-02-05 10:26:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:13,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:13,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 92 [2024-02-05 10:26:13,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:13,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:13,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 92 [2024-02-05 10:26:13,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:24,540 INFO L124 PetriNetUnfolderBase]: 98502/169310 cut-off events. [2024-02-05 10:26:24,541 INFO L125 PetriNetUnfolderBase]: For 7387/7387 co-relation queries the response was YES. [2024-02-05 10:26:24,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315179 conditions, 169310 events. 98502/169310 cut-off events. For 7387/7387 co-relation queries the response was YES. Maximal size of possible extension queue 6123. Compared 1806426 event pairs, 38096 based on Foata normal form. 24764/187259 useless extension candidates. Maximal degree in co-relation 296371. Up to 66459 conditions per place. [2024-02-05 10:26:25,677 INFO L140 encePairwiseOnDemand]: 66/92 looper letters, 79 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-02-05 10:26:25,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 558 flow [2024-02-05 10:26:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2024-02-05 10:26:25,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7880434782608695 [2024-02-05 10:26:25,679 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 193 flow. Second operand 4 states and 290 transitions. [2024-02-05 10:26:25,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 558 flow [2024-02-05 10:26:25,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 551 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:25,691 INFO L231 Difference]: Finished difference. Result has 100 places, 103 transitions, 380 flow [2024-02-05 10:26:25,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=380, PETRI_PLACES=100, PETRI_TRANSITIONS=103} [2024-02-05 10:26:25,692 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 3 predicate places. [2024-02-05 10:26:25,692 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 103 transitions, 380 flow [2024-02-05 10:26:25,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:25,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:25,693 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:25,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:26:25,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:25,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash -285384431, now seen corresponding path program 1 times [2024-02-05 10:26:25,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:25,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155070989] [2024-02-05 10:26:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:25,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-05 10:26:25,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155070989] [2024-02-05 10:26:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155070989] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:25,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:25,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:25,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184036788] [2024-02-05 10:26:25,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:25,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:25,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 92 [2024-02-05 10:26:25,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 103 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 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) [2024-02-05 10:26:25,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:25,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 92 [2024-02-05 10:26:25,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:33,807 INFO L124 PetriNetUnfolderBase]: 55567/112215 cut-off events. [2024-02-05 10:26:33,808 INFO L125 PetriNetUnfolderBase]: For 60983/63030 co-relation queries the response was YES. [2024-02-05 10:26:34,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255080 conditions, 112215 events. 55567/112215 cut-off events. For 60983/63030 co-relation queries the response was YES. Maximal size of possible extension queue 4884. Compared 1360640 event pairs, 10825 based on Foata normal form. 2342/108892 useless extension candidates. Maximal degree in co-relation 255059. Up to 63126 conditions per place. [2024-02-05 10:26:34,976 INFO L140 encePairwiseOnDemand]: 88/92 looper letters, 74 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2024-02-05 10:26:34,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 141 transitions, 695 flow [2024-02-05 10:26:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2024-02-05 10:26:34,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7853260869565217 [2024-02-05 10:26:34,978 INFO L175 Difference]: Start difference. First operand has 100 places, 103 transitions, 380 flow. Second operand 4 states and 289 transitions. [2024-02-05 10:26:34,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 141 transitions, 695 flow [2024-02-05 10:26:34,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 141 transitions, 695 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:34,992 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 380 flow [2024-02-05 10:26:34,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=380, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-02-05 10:26:34,993 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 4 predicate places. [2024-02-05 10:26:34,993 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 380 flow [2024-02-05 10:26:34,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 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) [2024-02-05 10:26:34,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:34,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:34,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:26:34,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:34,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1108826295, now seen corresponding path program 1 times [2024-02-05 10:26:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:34,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659715178] [2024-02-05 10:26:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:34,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659715178] [2024-02-05 10:26:35,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659715178] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:35,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:35,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:35,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235680836] [2024-02-05 10:26:35,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:35,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:35,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 92 [2024-02-05 10:26:35,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 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) [2024-02-05 10:26:35,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:35,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 92 [2024-02-05 10:26:35,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand