./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.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/14_spin2003-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8857f20b 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.2023-12-19_14-39-08.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-8857f20-m [2024-01-29 22:50:32,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-29 22:50:32,776 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-29 22:50:32,782 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-29 22:50:32,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-29 22:50:32,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-29 22:50:32,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-29 22:50:32,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-29 22:50:32,812 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-29 22:50:32,815 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-29 22:50:32,816 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-29 22:50:32,816 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-29 22:50:32,817 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-29 22:50:32,818 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-29 22:50:32,818 INFO L153 SettingsManager]: * Use SBE=true [2024-01-29 22:50:32,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-29 22:50:32,818 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-29 22:50:32,818 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-29 22:50:32,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-29 22:50:32,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-29 22:50:32,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-29 22:50:32,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-29 22:50:32,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-29 22:50:32,820 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-29 22:50:32,820 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-29 22:50:32,820 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-29 22:50:32,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-29 22:50:32,820 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-29 22:50:32,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-29 22:50:32,821 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-29 22:50:32,822 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-29 22:50:32,822 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-29 22:50:32,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 22:50:32,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-29 22:50:32,823 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-29 22:50:32,823 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-29 22:50:32,823 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-29 22:50:32,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-29 22:50:32,823 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-29 22:50:32,824 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-29 22:50:32,824 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-29 22:50:32,824 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-29 22:50:32,824 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-29 22:50:32,824 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-29 22:50:33,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-29 22:50:33,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-29 22:50:33,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-29 22:50:33,042 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-29 22:50:33,042 INFO L274 PluginConnector]: CDTParser initialized [2024-01-29 22:50:33,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2024-01-29 22:50:34,070 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-29 22:50:34,283 INFO L384 CDTParser]: Found 1 translation units. [2024-01-29 22:50:34,283 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2024-01-29 22:50:34,295 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd53d734f/c086eb4e40b849bd892382735499fd2a/FLAG6a96058c3 [2024-01-29 22:50:34,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd53d734f/c086eb4e40b849bd892382735499fd2a [2024-01-29 22:50:34,309 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-29 22:50:34,309 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-29 22:50:34,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/14_spin2003-pthread.yml/witness.yml [2024-01-29 22:50:34,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-29 22:50:34,383 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-29 22:50:34,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-29 22:50:34,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-29 22:50:34,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-29 22:50:34,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:50:34" (1/2) ... [2024-01-29 22:50:34,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5905aacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:50:34, skipping insertion in model container [2024-01-29 22:50:34,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:50:34" (1/2) ... [2024-01-29 22:50:34,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@600bcd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:50:34, skipping insertion in model container [2024-01-29 22:50:34,391 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:50:34" (2/2) ... [2024-01-29 22:50:34,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5905aacc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34, skipping insertion in model container [2024-01-29 22:50:34,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:50:34" (2/2) ... [2024-01-29 22:50:34,392 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-29 22:50:34,414 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-29 22:50:34,415 INFO L98 nessWitnessExtractor]: Location invariant before [L688-L688] (unsigned long )arg == 0UL [2024-01-29 22:50:34,415 INFO L98 nessWitnessExtractor]: Location invariant before [L690-L690] (x == 0) && ((unsigned long )arg == 0UL) [2024-01-29 22:50:34,415 INFO L98 nessWitnessExtractor]: Location invariant before [L690-L690] x == 0 [2024-01-29 22:50:34,416 INFO L98 nessWitnessExtractor]: Location invariant before [L691-L691] x == 1 [2024-01-29 22:50:34,416 INFO L98 nessWitnessExtractor]: Location invariant before [L691-L691] (x == 1) && ((unsigned long )arg == 0UL) [2024-01-29 22:50:34,416 INFO L98 nessWitnessExtractor]: Location invariant before [L689-L689] x == 1 [2024-01-29 22:50:34,417 INFO L98 nessWitnessExtractor]: Location invariant before [L689-L689] (x == 1) && ((unsigned long )arg == 0UL) [2024-01-29 22:50:34,417 INFO L98 nessWitnessExtractor]: Location invariant before [L691-L691] (x == 1) && ((unsigned long )arg == 0UL) [2024-01-29 22:50:34,417 INFO L98 nessWitnessExtractor]: Location invariant before [L691-L691] x == 1 [2024-01-29 22:50:34,417 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] (unsigned long )arg == 0UL [2024-01-29 22:50:34,417 INFO L98 nessWitnessExtractor]: Location invariant before [L692-L692] (x == 1) && ((unsigned long )arg == 0UL) [2024-01-29 22:50:34,417 INFO L98 nessWitnessExtractor]: Location invariant before [L692-L692] x == 1 [2024-01-29 22:50:34,452 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-29 22:50:34,698 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] [2024-01-29 22:50:34,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 22:50:34,721 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-29 22:50:34,787 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 [2024-01-29 22:50:34,790 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-29 22:50:34,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 22:50:34,831 INFO L206 MainTranslator]: Completed translation [2024-01-29 22:50:34,832 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34 WrapperNode [2024-01-29 22:50:34,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-29 22:50:34,834 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-29 22:50:34,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-29 22:50:34,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-29 22:50:34,840 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 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,867 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 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,884 INFO L138 Inliner]: procedures = 162, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2024-01-29 22:50:34,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-29 22:50:34,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-29 22:50:34,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-29 22:50:34,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-29 22:50:34,893 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,898 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,913 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 5, 1]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-01-29 22:50:34,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,915 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,928 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,937 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,943 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-29 22:50:34,945 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-29 22:50:34,946 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-29 22:50:34,946 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-29 22:50:34,946 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (1/1) ... [2024-01-29 22:50:34,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 22:50:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:50:34,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-29 22:50:34,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-29 22:50:35,009 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-29 22:50:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-29 22:50:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-29 22:50:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-29 22:50:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-29 22:50:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-29 22:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-29 22:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-29 22:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-29 22:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-29 22:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-29 22:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-29 22:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-29 22:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-29 22:50:35,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-29 22:50:35,014 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-29 22:50:35,140 INFO L244 CfgBuilder]: Building ICFG [2024-01-29 22:50:35,142 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-29 22:50:35,311 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-29 22:50:35,311 INFO L293 CfgBuilder]: Performing block encoding [2024-01-29 22:50:35,369 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-29 22:50:35,369 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-29 22:50:35,370 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:50:35 BoogieIcfgContainer [2024-01-29 22:50:35,370 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-29 22:50:35,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-29 22:50:35,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-29 22:50:35,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-29 22:50:35,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 10:50:34" (1/4) ... [2024-01-29 22:50:35,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d95be20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:50:35, skipping insertion in model container [2024-01-29 22:50:35,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:50:34" (2/4) ... [2024-01-29 22:50:35,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d95be20 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 29.01 10:50:35, skipping insertion in model container [2024-01-29 22:50:35,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:50:34" (3/4) ... [2024-01-29 22:50:35,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d95be20 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 29.01 10:50:35, skipping insertion in model container [2024-01-29 22:50:35,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:50:35" (4/4) ... [2024-01-29 22:50:35,377 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003-pthread.i [2024-01-29 22:50:35,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-29 22:50:35,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-01-29 22:50:35,390 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-29 22:50:35,449 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-29 22:50:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 72 flow [2024-01-29 22:50:35,497 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2024-01-29 22:50:35,498 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:50:35,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 1/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-01-29 22:50:35,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 72 flow [2024-01-29 22:50:35,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 72 flow [2024-01-29 22:50:35,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 22:50:35,520 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;@25e59786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 22:50:35,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2024-01-29 22:50:35,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 22:50:35,524 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-01-29 22:50:35,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:50:35,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:35,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-29 22:50:35,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 20 more)] === [2024-01-29 22:50:35,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash 169599198, now seen corresponding path program 1 times [2024-01-29 22:50:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:35,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364203192] [2024-01-29 22:50:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:35,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364203192] [2024-01-29 22:50:35,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364203192] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:35,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:35,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056864643] [2024-01-29 22:50:35,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:35,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:35,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:35,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:35,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 34 [2024-01-29 22:50:35,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:35,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:35,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 34 [2024-01-29 22:50:35,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:35,989 INFO L124 PetriNetUnfolderBase]: 6/63 cut-off events. [2024-01-29 22:50:35,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:50:35,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 63 events. 6/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 0 based on Foata normal form. 4/53 useless extension candidates. Maximal degree in co-relation 78. Up to 18 conditions per place. [2024-01-29 22:50:35,991 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 9 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-01-29 22:50:35,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 90 flow [2024-01-29 22:50:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:50:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:50:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-01-29 22:50:36,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7426470588235294 [2024-01-29 22:50:36,002 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 72 flow. Second operand 4 states and 101 transitions. [2024-01-29 22:50:36,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 90 flow [2024-01-29 22:50:36,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-29 22:50:36,006 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 68 flow [2024-01-29 22:50:36,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2024-01-29 22:50:36,010 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-01-29 22:50:36,010 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 68 flow [2024-01-29 22:50:36,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:36,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:36,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-01-29 22:50:36,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-29 22:50:36,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 20 more)] === [2024-01-29 22:50:36,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash 169598854, now seen corresponding path program 1 times [2024-01-29 22:50:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:36,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933433596] [2024-01-29 22:50:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-29 22:50:36,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-29 22:50:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-29 22:50:36,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-29 22:50:36,057 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-29 22:50:36,059 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2024-01-29 22:50:36,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 23 remaining) [2024-01-29 22:50:36,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 23 remaining) [2024-01-29 22:50:36,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 23 remaining) [2024-01-29 22:50:36,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 23 remaining) [2024-01-29 22:50:36,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 23 remaining) [2024-01-29 22:50:36,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 23 remaining) [2024-01-29 22:50:36,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 23 remaining) [2024-01-29 22:50:36,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (14 of 23 remaining) [2024-01-29 22:50:36,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 23 remaining) [2024-01-29 22:50:36,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 23 remaining) [2024-01-29 22:50:36,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 23 remaining) [2024-01-29 22:50:36,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 23 remaining) [2024-01-29 22:50:36,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 23 remaining) [2024-01-29 22:50:36,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 23 remaining) [2024-01-29 22:50:36,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 23 remaining) [2024-01-29 22:50:36,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 23 remaining) [2024-01-29 22:50:36,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 23 remaining) [2024-01-29 22:50:36,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 23 remaining) [2024-01-29 22:50:36,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (3 of 23 remaining) [2024-01-29 22:50:36,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 23 remaining) [2024-01-29 22:50:36,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 23 remaining) [2024-01-29 22:50:36,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 23 remaining) [2024-01-29 22:50:36,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-29 22:50:36,066 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-29 22:50:36,068 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-29 22:50:36,068 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-29 22:50:36,098 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-29 22:50:36,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 138 flow [2024-01-29 22:50:36,123 INFO L124 PetriNetUnfolderBase]: 2/68 cut-off events. [2024-01-29 22:50:36,123 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-29 22:50:36,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 2/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 148 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place. [2024-01-29 22:50:36,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 138 flow [2024-01-29 22:50:36,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 138 flow [2024-01-29 22:50:36,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 22:50:36,128 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;@25e59786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 22:50:36,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-01-29 22:50:36,130 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 22:50:36,130 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-01-29 22:50:36,130 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-29 22:50:36,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:36,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-29 22:50:36,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-01-29 22:50:36,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 230703515, now seen corresponding path program 1 times [2024-01-29 22:50:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026135112] [2024-01-29 22:50:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:36,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026135112] [2024-01-29 22:50:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026135112] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:36,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:36,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801234460] [2024-01-29 22:50:36,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:36,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:36,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:36,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 64 [2024-01-29 22:50:36,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:36,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:36,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 64 [2024-01-29 22:50:36,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:36,426 INFO L124 PetriNetUnfolderBase]: 113/562 cut-off events. [2024-01-29 22:50:36,426 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-01-29 22:50:36,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 562 events. 113/562 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3601 event pairs, 55 based on Foata normal form. 39/473 useless extension candidates. Maximal degree in co-relation 671. Up to 192 conditions per place. [2024-01-29 22:50:36,433 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 21 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-01-29 22:50:36,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 195 flow [2024-01-29 22:50:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:50:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:50:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2024-01-29 22:50:36,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.80859375 [2024-01-29 22:50:36,440 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 138 flow. Second operand 4 states and 207 transitions. [2024-01-29 22:50:36,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 195 flow [2024-01-29 22:50:36,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 195 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-29 22:50:36,442 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 132 flow [2024-01-29 22:50:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-01-29 22:50:36,443 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-01-29 22:50:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 132 flow [2024-01-29 22:50:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:36,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:36,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-01-29 22:50:36,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-29 22:50:36,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-01-29 22:50:36,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1633407544, now seen corresponding path program 1 times [2024-01-29 22:50:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466467330] [2024-01-29 22:50:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-29 22:50:36,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-29 22:50:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-29 22:50:36,485 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-29 22:50:36,487 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-29 22:50:36,487 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2024-01-29 22:50:36,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 34 remaining) [2024-01-29 22:50:36,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 34 remaining) [2024-01-29 22:50:36,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 34 remaining) [2024-01-29 22:50:36,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 34 remaining) [2024-01-29 22:50:36,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 34 remaining) [2024-01-29 22:50:36,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 34 remaining) [2024-01-29 22:50:36,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 34 remaining) [2024-01-29 22:50:36,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (25 of 34 remaining) [2024-01-29 22:50:36,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 34 remaining) [2024-01-29 22:50:36,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 34 remaining) [2024-01-29 22:50:36,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 34 remaining) [2024-01-29 22:50:36,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 34 remaining) [2024-01-29 22:50:36,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 34 remaining) [2024-01-29 22:50:36,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 34 remaining) [2024-01-29 22:50:36,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 34 remaining) [2024-01-29 22:50:36,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 34 remaining) [2024-01-29 22:50:36,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 34 remaining) [2024-01-29 22:50:36,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 34 remaining) [2024-01-29 22:50:36,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (14 of 34 remaining) [2024-01-29 22:50:36,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 34 remaining) [2024-01-29 22:50:36,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 34 remaining) [2024-01-29 22:50:36,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 34 remaining) [2024-01-29 22:50:36,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 34 remaining) [2024-01-29 22:50:36,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 34 remaining) [2024-01-29 22:50:36,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 34 remaining) [2024-01-29 22:50:36,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 34 remaining) [2024-01-29 22:50:36,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 34 remaining) [2024-01-29 22:50:36,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 34 remaining) [2024-01-29 22:50:36,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 34 remaining) [2024-01-29 22:50:36,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (3 of 34 remaining) [2024-01-29 22:50:36,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 34 remaining) [2024-01-29 22:50:36,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 34 remaining) [2024-01-29 22:50:36,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 34 remaining) [2024-01-29 22:50:36,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-29 22:50:36,496 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-29 22:50:36,497 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-29 22:50:36,497 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-29 22:50:36,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-29 22:50:36,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 94 transitions, 206 flow [2024-01-29 22:50:36,545 INFO L124 PetriNetUnfolderBase]: 3/100 cut-off events. [2024-01-29 22:50:36,545 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-29 22:50:36,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 3/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 338 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2024-01-29 22:50:36,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 94 transitions, 206 flow [2024-01-29 22:50:36,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 94 transitions, 206 flow [2024-01-29 22:50:36,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 22:50:36,549 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;@25e59786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 22:50:36,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-01-29 22:50:36,550 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 22:50:36,550 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-29 22:50:36,550 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-29 22:50:36,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:36,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-29 22:50:36,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-29 22:50:36,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash 320436054, now seen corresponding path program 1 times [2024-01-29 22:50:36,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:36,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818585337] [2024-01-29 22:50:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:36,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:36,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818585337] [2024-01-29 22:50:36,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818585337] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:36,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:36,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836222268] [2024-01-29 22:50:36,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:36,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:36,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:36,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 94 [2024-01-29 22:50:36,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:36,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:36,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 94 [2024-01-29 22:50:36,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:37,043 INFO L124 PetriNetUnfolderBase]: 1175/4016 cut-off events. [2024-01-29 22:50:37,043 INFO L125 PetriNetUnfolderBase]: For 361/361 co-relation queries the response was YES. [2024-01-29 22:50:37,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 4016 events. 1175/4016 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 37969 event pairs, 795 based on Foata normal form. 327/3513 useless extension candidates. Maximal degree in co-relation 4418. Up to 1596 conditions per place. [2024-01-29 22:50:37,072 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 33 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2024-01-29 22:50:37,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 304 flow [2024-01-29 22:50:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:50:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:50:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2024-01-29 22:50:37,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8324468085106383 [2024-01-29 22:50:37,075 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 206 flow. Second operand 4 states and 313 transitions. [2024-01-29 22:50:37,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 304 flow [2024-01-29 22:50:37,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 102 transitions, 300 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-29 22:50:37,080 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 196 flow [2024-01-29 22:50:37,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2024-01-29 22:50:37,082 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 0 predicate places. [2024-01-29 22:50:37,083 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 196 flow [2024-01-29 22:50:37,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:37,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:37,084 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-01-29 22:50:37,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-29 22:50:37,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-29 22:50:37,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1299750437, now seen corresponding path program 1 times [2024-01-29 22:50:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:37,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246594719] [2024-01-29 22:50:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:37,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-29 22:50:37,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246594719] [2024-01-29 22:50:37,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246594719] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:37,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:37,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:37,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123987787] [2024-01-29 22:50:37,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:37,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:37,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:37,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:37,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 94 [2024-01-29 22:50:37,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:37,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:37,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 94 [2024-01-29 22:50:37,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:37,479 INFO L124 PetriNetUnfolderBase]: 1173/3908 cut-off events. [2024-01-29 22:50:37,480 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2024-01-29 22:50:37,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5837 conditions, 3908 events. 1173/3908 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 36719 event pairs, 720 based on Foata normal form. 84/3113 useless extension candidates. Maximal degree in co-relation 5820. Up to 1572 conditions per place. [2024-01-29 22:50:37,508 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 37 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2024-01-29 22:50:37,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 311 flow [2024-01-29 22:50:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:50:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:50:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2024-01-29 22:50:37,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8218085106382979 [2024-01-29 22:50:37,511 INFO L175 Difference]: Start difference. First operand has 98 places, 88 transitions, 196 flow. Second operand 4 states and 309 transitions. [2024-01-29 22:50:37,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 311 flow [2024-01-29 22:50:37,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:50:37,515 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 193 flow [2024-01-29 22:50:37,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2024-01-29 22:50:37,517 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2024-01-29 22:50:37,517 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 193 flow [2024-01-29 22:50:37,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:37,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:37,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:37,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-29 22:50:37,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-29 22:50:37,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1601446850, now seen corresponding path program 1 times [2024-01-29 22:50:37,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:37,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492186509] [2024-01-29 22:50:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:37,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:37,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492186509] [2024-01-29 22:50:37,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492186509] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:37,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:37,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 22:50:37,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144168073] [2024-01-29 22:50:37,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:37,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:37,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:37,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:37,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 94 [2024-01-29 22:50:37,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:37,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:37,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 94 [2024-01-29 22:50:37,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:40,928 INFO L124 PetriNetUnfolderBase]: 28104/53612 cut-off events. [2024-01-29 22:50:40,928 INFO L125 PetriNetUnfolderBase]: For 1467/1467 co-relation queries the response was YES. [2024-01-29 22:50:41,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100121 conditions, 53612 events. 28104/53612 cut-off events. For 1467/1467 co-relation queries the response was YES. Maximal size of possible extension queue 1841. Compared 543023 event pairs, 9684 based on Foata normal form. 6564/57114 useless extension candidates. Maximal degree in co-relation 96001. Up to 20052 conditions per place. [2024-01-29 22:50:41,232 INFO L140 encePairwiseOnDemand]: 52/94 looper letters, 90 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-01-29 22:50:41,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 588 flow [2024-01-29 22:50:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:50:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:50:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2024-01-29 22:50:41,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7686170212765957 [2024-01-29 22:50:41,235 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 193 flow. Second operand 4 states and 289 transitions. [2024-01-29 22:50:41,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 588 flow [2024-01-29 22:50:41,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 581 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:50:41,239 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 466 flow [2024-01-29 22:50:41,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=466, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-01-29 22:50:41,239 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 3 predicate places. [2024-01-29 22:50:41,239 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 466 flow [2024-01-29 22:50:41,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:41,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:41,240 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-01-29 22:50:41,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-29 22:50:41,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 42 more)] === [2024-01-29 22:50:41,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash 773267171, now seen corresponding path program 1 times [2024-01-29 22:50:41,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:41,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454406463] [2024-01-29 22:50:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:41,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-29 22:50:41,249 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-29 22:50:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-29 22:50:41,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-29 22:50:41,256 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-29 22:50:41,256 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2024-01-29 22:50:41,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (36 of 45 remaining) [2024-01-29 22:50:41,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 45 remaining) [2024-01-29 22:50:41,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 45 remaining) [2024-01-29 22:50:41,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 45 remaining) [2024-01-29 22:50:41,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 45 remaining) [2024-01-29 22:50:41,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 45 remaining) [2024-01-29 22:50:41,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 45 remaining) [2024-01-29 22:50:41,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 45 remaining) [2024-01-29 22:50:41,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 45 remaining) [2024-01-29 22:50:41,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 45 remaining) [2024-01-29 22:50:41,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 45 remaining) [2024-01-29 22:50:41,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (25 of 45 remaining) [2024-01-29 22:50:41,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 45 remaining) [2024-01-29 22:50:41,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 45 remaining) [2024-01-29 22:50:41,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 45 remaining) [2024-01-29 22:50:41,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 45 remaining) [2024-01-29 22:50:41,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 45 remaining) [2024-01-29 22:50:41,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 45 remaining) [2024-01-29 22:50:41,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 45 remaining) [2024-01-29 22:50:41,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 45 remaining) [2024-01-29 22:50:41,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 45 remaining) [2024-01-29 22:50:41,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 45 remaining) [2024-01-29 22:50:41,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (14 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 45 remaining) [2024-01-29 22:50:41,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 45 remaining) [2024-01-29 22:50:41,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 45 remaining) [2024-01-29 22:50:41,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 45 remaining) [2024-01-29 22:50:41,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (3 of 45 remaining) [2024-01-29 22:50:41,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 45 remaining) [2024-01-29 22:50:41,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 45 remaining) [2024-01-29 22:50:41,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 45 remaining) [2024-01-29 22:50:41,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-29 22:50:41,263 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-29 22:50:41,263 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-29 22:50:41,263 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-29 22:50:41,299 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-29 22:50:41,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 124 transitions, 276 flow [2024-01-29 22:50:41,326 INFO L124 PetriNetUnfolderBase]: 4/132 cut-off events. [2024-01-29 22:50:41,327 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-29 22:50:41,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 4/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 522 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 118. Up to 5 conditions per place. [2024-01-29 22:50:41,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 124 transitions, 276 flow [2024-01-29 22:50:41,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 124 transitions, 276 flow [2024-01-29 22:50:41,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 22:50:41,331 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;@25e59786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 22:50:41,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2024-01-29 22:50:41,332 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 22:50:41,332 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-29 22:50:41,332 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-29 22:50:41,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:41,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-29 22:50:41,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 53 more)] === [2024-01-29 22:50:41,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash 438798671, now seen corresponding path program 1 times [2024-01-29 22:50:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:41,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223067415] [2024-01-29 22:50:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:41,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:41,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223067415] [2024-01-29 22:50:41,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223067415] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:41,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:41,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398471969] [2024-01-29 22:50:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:41,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:41,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:41,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2024-01-29 22:50:41,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 124 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:41,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:41,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2024-01-29 22:50:41,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:43,393 INFO L124 PetriNetUnfolderBase]: 10067/27300 cut-off events. [2024-01-29 22:50:43,393 INFO L125 PetriNetUnfolderBase]: For 3925/3925 co-relation queries the response was YES. [2024-01-29 22:50:43,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42452 conditions, 27300 events. 10067/27300 cut-off events. For 3925/3925 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 322557 event pairs, 7745 based on Foata normal form. 2553/24794 useless extension candidates. Maximal degree in co-relation 30365. Up to 12180 conditions per place. [2024-01-29 22:50:43,664 INFO L140 encePairwiseOnDemand]: 115/124 looper letters, 45 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2024-01-29 22:50:43,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 417 flow [2024-01-29 22:50:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:50:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:50:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2024-01-29 22:50:43,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.844758064516129 [2024-01-29 22:50:43,666 INFO L175 Difference]: Start difference. First operand has 129 places, 124 transitions, 276 flow. Second operand 4 states and 419 transitions. [2024-01-29 22:50:43,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 417 flow [2024-01-29 22:50:43,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 137 transitions, 405 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-29 22:50:43,672 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 260 flow [2024-01-29 22:50:43,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2024-01-29 22:50:43,674 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 0 predicate places. [2024-01-29 22:50:43,674 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 260 flow [2024-01-29 22:50:43,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:43,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:43,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-01-29 22:50:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-29 22:50:43,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 53 more)] === [2024-01-29 22:50:43,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash 776715761, now seen corresponding path program 1 times [2024-01-29 22:50:43,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:43,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751762658] [2024-01-29 22:50:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:43,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-29 22:50:43,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751762658] [2024-01-29 22:50:43,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751762658] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:43,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:43,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:50:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817594533] [2024-01-29 22:50:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:43,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:43,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2024-01-29 22:50:43,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:43,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:43,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2024-01-29 22:50:43,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:50:45,345 INFO L124 PetriNetUnfolderBase]: 10065/25214 cut-off events. [2024-01-29 22:50:45,345 INFO L125 PetriNetUnfolderBase]: For 2101/2101 co-relation queries the response was YES. [2024-01-29 22:50:45,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39816 conditions, 25214 events. 10065/25214 cut-off events. For 2101/2101 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 285921 event pairs, 575 based on Foata normal form. 516/21296 useless extension candidates. Maximal degree in co-relation 39798. Up to 12156 conditions per place. [2024-01-29 22:50:45,515 INFO L140 encePairwiseOnDemand]: 120/124 looper letters, 49 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2024-01-29 22:50:45,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 139 transitions, 416 flow [2024-01-29 22:50:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:50:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:50:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 413 transitions. [2024-01-29 22:50:45,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8326612903225806 [2024-01-29 22:50:45,517 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 260 flow. Second operand 4 states and 413 transitions. [2024-01-29 22:50:45,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 139 transitions, 416 flow [2024-01-29 22:50:45,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 139 transitions, 413 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:50:45,522 INFO L231 Difference]: Finished difference. Result has 128 places, 115 transitions, 257 flow [2024-01-29 22:50:45,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=128, PETRI_TRANSITIONS=115} [2024-01-29 22:50:45,523 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-01-29 22:50:45,523 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 115 transitions, 257 flow [2024-01-29 22:50:45,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:45,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:50:45,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:50:45,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-29 22:50:45,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 53 more)] === [2024-01-29 22:50:45,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:50:45,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1628721890, now seen corresponding path program 1 times [2024-01-29 22:50:45,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:50:45,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046363709] [2024-01-29 22:50:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:50:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:50:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:50:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:50:45,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:50:45,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046363709] [2024-01-29 22:50:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046363709] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:50:45,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:50:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-29 22:50:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647059895] [2024-01-29 22:50:45,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:50:45,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:50:45,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:50:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:50:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:50:45,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 124 [2024-01-29 22:50:45,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 115 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-29 22:50:45,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:50:45,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 124 [2024-01-29 22:50:45,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand