./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --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/popl20-proofs-counter-add-4-semi-Q67.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-proofs-counter-add-4-semi-Q67.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:11:22,124 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:11:22,202 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:11:22,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:11:22,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:11:22,236 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:11:22,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:11:22,237 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:11:22,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:11:22,240 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:11:22,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:11:22,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:11:22,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:11:22,242 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:11:22,243 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:11:22,243 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:11:22,243 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:11:22,243 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:11:22,243 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:11:22,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:11:22,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:11:22,244 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:11:22,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:11:22,244 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:11:22,245 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:11:22,245 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:11:22,245 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:11:22,245 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:11:22,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:11:22,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:11:22,247 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:11:22,247 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:11:22,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:22,247 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:11:22,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:11:22,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:11:22,247 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:11:22,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:11:22,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:11:22,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:11:22,248 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:11:22,248 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:11:22,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:11:22,249 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:11:22,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:11:22,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:11:22,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:11:22,494 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:11:22,494 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:11:22,495 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-01-31 16:11:23,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:11:23,615 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:11:23,615 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-01-31 16:11:23,621 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b408d7c40/da5046fc5f70463a9a400d3e276b54a4/FLAGde3d17148 [2024-01-31 16:11:23,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b408d7c40/da5046fc5f70463a9a400d3e276b54a4 [2024-01-31 16:11:23,639 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:11:23,640 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:11:23,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-proofs-counter-add-4-semi-Q67.wvr.yml/witness.yml [2024-01-31 16:11:23,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:11:23,800 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:11:23,800 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:23,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:11:23,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:11:23,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:23" (1/2) ... [2024-01-31 16:11:23,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276fafbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:23, skipping insertion in model container [2024-01-31 16:11:23,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:23" (1/2) ... [2024-01-31 16:11:23,809 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@767bf254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:23, skipping insertion in model container [2024-01-31 16:11:23,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:23" (2/2) ... [2024-01-31 16:11:23,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276fafbd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:23, skipping insertion in model container [2024-01-31 16:11:23,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:23" (2/2) ... [2024-01-31 16:11:23,810 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:11:23,862 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:11:23,863 INFO L98 nessWitnessExtractor]: Location invariant before [L89-L89] (((((((i1 == 0) && (i2 == 0)) && (N2 == 0)) && (counter == 0)) && (j1 == 0)) && (j2 == 0)) && (M1 == 0)) && (M2 == 0) [2024-01-31 16:11:23,864 INFO L98 nessWitnessExtractor]: Location invariant before [L53-L53] ((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,864 INFO L98 nessWitnessExtractor]: Location invariant before [L65-L65] ((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,864 INFO L98 nessWitnessExtractor]: Location invariant before [L92-L92] ((((i1 == 0) && (i2 == 0)) && (counter == 0)) && (j1 == 0)) && (j2 == 0) [2024-01-31 16:11:23,864 INFO L98 nessWitnessExtractor]: Location invariant before [L64-L64] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,865 INFO L98 nessWitnessExtractor]: Loop invariant at [L51-L51] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,865 INFO L98 nessWitnessExtractor]: Location invariant before [L66-L66] (((((-2147483647 <= counter) && (0 <= i1)) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,865 INFO L98 nessWitnessExtractor]: Loop invariant at [L40-L40] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,865 INFO L98 nessWitnessExtractor]: Location invariant before [L67-L67] (((((-2147483647 <= counter) && (0 <= i1)) && (0 <= i2)) && (0 <= j2)) && (1 <= j1)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,865 INFO L98 nessWitnessExtractor]: Location invariant before [L52-L52] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,866 INFO L98 nessWitnessExtractor]: Location invariant before [L41-L41] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,866 INFO L98 nessWitnessExtractor]: Location invariant before [L54-L54] ((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,866 INFO L98 nessWitnessExtractor]: Location invariant before [L78-L78] (((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && (counter <= 2147483646)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,866 INFO L98 nessWitnessExtractor]: Location invariant before [L79-L79] (((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (1 <= j2)) && (counter <= 2147483646)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,866 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,866 INFO L98 nessWitnessExtractor]: Loop invariant at [L74-L74] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,866 INFO L98 nessWitnessExtractor]: Location invariant before [L77-L77] ((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,867 INFO L98 nessWitnessExtractor]: Location invariant before [L70-L70] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,867 INFO L98 nessWitnessExtractor]: Location invariant before [L82-L82] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,867 INFO L98 nessWitnessExtractor]: Loop invariant at [L63-L63] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,867 INFO L98 nessWitnessExtractor]: Location invariant before [L43-L43] (((((-2147483647 <= counter) && (0 <= i1)) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,867 INFO L98 nessWitnessExtractor]: Location invariant before [L91-L91] (((((i1 == 0) && (i2 == 0)) && (counter == 0)) && (j1 == 0)) && (j2 == 0)) && (M2 == 0) [2024-01-31 16:11:23,868 INFO L98 nessWitnessExtractor]: Location invariant before [L44-L44] (((((-2147483647 <= counter) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && (1 <= i1)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,868 INFO L98 nessWitnessExtractor]: Location invariant before [L75-L75] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,868 INFO L98 nessWitnessExtractor]: Location invariant before [L90-L90] ((((((i1 == 0) && (i2 == 0)) && (counter == 0)) && (j1 == 0)) && (j2 == 0)) && (M1 == 0)) && (M2 == 0) [2024-01-31 16:11:23,868 INFO L98 nessWitnessExtractor]: Location invariant before [L88-L88] ((((((((i1 == 0) && (i2 == 0)) && (N1 == 0)) && (N2 == 0)) && (counter == 0)) && (j1 == 0)) && (j2 == 0)) && (M1 == 0)) && (M2 == 0) [2024-01-31 16:11:23,868 INFO L98 nessWitnessExtractor]: Location invariant before [L56-L56] (((((0 <= i1) && (0 <= j1)) && (0 <= j2)) && (1 <= i2)) && (counter <= 2147483646)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,868 INFO L98 nessWitnessExtractor]: Location invariant before [L76-L76] ((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,869 INFO L98 nessWitnessExtractor]: Location invariant before [L95-L95] ((((i1 == 0) && (i2 == 0)) && (counter == 0)) && (j1 == 0)) && (j2 == 0) [2024-01-31 16:11:23,869 INFO L98 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-01-31 16:11:23,869 INFO L98 nessWitnessExtractor]: Location invariant before [L55-L55] (((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && (counter <= 2147483646)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,869 INFO L98 nessWitnessExtractor]: Location invariant before [L42-L42] ((((0 <= i1) && (0 <= i2)) && (0 <= j1)) && (0 <= j2)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:11:23,886 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:11:24,012 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2663,2676] [2024-01-31 16:11:24,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:24,027 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:11:24,122 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2663,2676] [2024-01-31 16:11:24,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:24,138 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:11:24,139 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24 WrapperNode [2024-01-31 16:11:24,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:24,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:24,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:11:24,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:11:24,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,173 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 158 [2024-01-31 16:11:24,173 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:24,174 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:11:24,174 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:11:24,174 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:11:24,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,205 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-31 16:11:24,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,214 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,216 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:11:24,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:11:24,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:11:24,219 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:11:24,220 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (1/1) ... [2024-01-31 16:11:24,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:24,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:24,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:11:24,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:11:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:11:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:11:24,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:11:24,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:11:24,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:11:24,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 16:11:24,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 16:11:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-31 16:11:24,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-31 16:11:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:11:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:11:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:11:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:11:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:11:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:11:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:11:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:11:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:11:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:11:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:11:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:11:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:11:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:11:24,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:11:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:11:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:11:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:11:24,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:11:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:11:24,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:11:24,277 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:11:24,378 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:11:24,381 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:11:24,705 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:11:24,705 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:11:24,892 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:11:24,893 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 16:11:24,894 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:24 BoogieIcfgContainer [2024-01-31 16:11:24,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:11:24,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:11:24,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:11:24,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:11:24,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:11:23" (1/4) ... [2024-01-31 16:11:24,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1df0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:11:24, skipping insertion in model container [2024-01-31 16:11:24,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:23" (2/4) ... [2024-01-31 16:11:24,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1df0ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:11:24, skipping insertion in model container [2024-01-31 16:11:24,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:24" (3/4) ... [2024-01-31 16:11:24,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1df0ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:11:24, skipping insertion in model container [2024-01-31 16:11:24,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:24" (4/4) ... [2024-01-31 16:11:24,904 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2024-01-31 16:11:24,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:11:24,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2024-01-31 16:11:24,917 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:11:24,978 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-31 16:11:25,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 93 transitions, 214 flow [2024-01-31 16:11:25,049 INFO L124 PetriNetUnfolderBase]: 8/89 cut-off events. [2024-01-31 16:11:25,050 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 16:11:25,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 89 events. 8/89 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 254 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2024-01-31 16:11:25,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 93 transitions, 214 flow [2024-01-31 16:11:25,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 88 transitions, 200 flow [2024-01-31 16:11:25,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:11:25,076 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;@198bc753, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:11:25,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2024-01-31 16:11:25,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:11:25,078 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:11:25,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:25,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:25,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:11:25,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:25,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash 17048, now seen corresponding path program 1 times [2024-01-31 16:11:25,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:25,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750429998] [2024-01-31 16:11:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:25,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:25,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:25,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750429998] [2024-01-31 16:11:25,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750429998] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:25,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:25,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:25,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566439630] [2024-01-31 16:11:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:25,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:25,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 93 [2024-01-31 16:11:25,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:25,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:25,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 93 [2024-01-31 16:11:25,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:27,409 INFO L124 PetriNetUnfolderBase]: 13297/22490 cut-off events. [2024-01-31 16:11:27,409 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2024-01-31 16:11:27,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40027 conditions, 22490 events. 13297/22490 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 197486 event pairs, 9104 based on Foata normal form. 3966/19791 useless extension candidates. Maximal degree in co-relation 35309. Up to 16754 conditions per place. [2024-01-31 16:11:27,607 INFO L140 encePairwiseOnDemand]: 80/93 looper letters, 46 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-01-31 16:11:27,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 274 flow [2024-01-31 16:11:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2024-01-31 16:11:27,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663082437275986 [2024-01-31 16:11:27,618 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 200 flow. Second operand 3 states and 158 transitions. [2024-01-31 16:11:27,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 274 flow [2024-01-31 16:11:27,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 258 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 16:11:27,666 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 166 flow [2024-01-31 16:11:27,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-01-31 16:11:27,670 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -13 predicate places. [2024-01-31 16:11:27,670 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 166 flow [2024-01-31 16:11:27,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:27,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:27,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-31 16:11:27,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:11:27,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:27,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash 528973, now seen corresponding path program 1 times [2024-01-31 16:11:27,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:27,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437695822] [2024-01-31 16:11:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:27,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:27,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437695822] [2024-01-31 16:11:27,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437695822] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:27,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:27,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410206693] [2024-01-31 16:11:27,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:27,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:27,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:27,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:27,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 93 [2024-01-31 16:11:27,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:27,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:27,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 93 [2024-01-31 16:11:27,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:29,168 INFO L124 PetriNetUnfolderBase]: 12392/19956 cut-off events. [2024-01-31 16:11:29,168 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-01-31 16:11:29,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35532 conditions, 19956 events. 12392/19956 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 1515. Compared 167597 event pairs, 7698 based on Foata normal form. 0/13208 useless extension candidates. Maximal degree in co-relation 35523. Up to 15354 conditions per place. [2024-01-31 16:11:29,274 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 44 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-01-31 16:11:29,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 256 flow [2024-01-31 16:11:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2024-01-31 16:11:29,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448028673835126 [2024-01-31 16:11:29,280 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 166 flow. Second operand 3 states and 152 transitions. [2024-01-31 16:11:29,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 256 flow [2024-01-31 16:11:29,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:29,283 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 164 flow [2024-01-31 16:11:29,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2024-01-31 16:11:29,284 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -14 predicate places. [2024-01-31 16:11:29,284 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 164 flow [2024-01-31 16:11:29,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:29,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:29,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:11:29,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:11:29,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:29,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash 16398722, now seen corresponding path program 1 times [2024-01-31 16:11:29,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:29,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881688324] [2024-01-31 16:11:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:29,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:29,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881688324] [2024-01-31 16:11:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881688324] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601056981] [2024-01-31 16:11:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:29,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:29,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:29,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:29,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:29,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:30,342 INFO L124 PetriNetUnfolderBase]: 11208/16609 cut-off events. [2024-01-31 16:11:30,343 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-01-31 16:11:30,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30463 conditions, 16609 events. 11208/16609 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 122049 event pairs, 6292 based on Foata normal form. 0/10071 useless extension candidates. Maximal degree in co-relation 30452. Up to 13666 conditions per place. [2024-01-31 16:11:30,455 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 42 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-31 16:11:30,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 250 flow [2024-01-31 16:11:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-01-31 16:11:30,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5591397849462365 [2024-01-31 16:11:30,457 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 164 flow. Second operand 3 states and 156 transitions. [2024-01-31 16:11:30,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 250 flow [2024-01-31 16:11:30,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:30,459 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 162 flow [2024-01-31 16:11:30,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2024-01-31 16:11:30,460 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -15 predicate places. [2024-01-31 16:11:30,460 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 162 flow [2024-01-31 16:11:30,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:30,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:30,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:11:30,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:11:30,461 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:30,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash 508360900, now seen corresponding path program 1 times [2024-01-31 16:11:30,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:30,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7944198] [2024-01-31 16:11:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:30,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:30,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7944198] [2024-01-31 16:11:30,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7944198] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:30,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:30,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:30,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601156361] [2024-01-31 16:11:30,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:30,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:30,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2024-01-31 16:11:30,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:30,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:30,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2024-01-31 16:11:30,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:31,326 INFO L124 PetriNetUnfolderBase]: 10005/13883 cut-off events. [2024-01-31 16:11:31,326 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-01-31 16:11:31,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26086 conditions, 13883 events. 10005/13883 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 87336 event pairs, 5127 based on Foata normal form. 0/7539 useless extension candidates. Maximal degree in co-relation 26073. Up to 12039 conditions per place. [2024-01-31 16:11:31,407 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 40 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-01-31 16:11:31,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 244 flow [2024-01-31 16:11:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2024-01-31 16:11:31,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5734767025089605 [2024-01-31 16:11:31,409 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 162 flow. Second operand 3 states and 160 transitions. [2024-01-31 16:11:31,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 244 flow [2024-01-31 16:11:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:31,410 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 160 flow [2024-01-31 16:11:31,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2024-01-31 16:11:31,411 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -16 predicate places. [2024-01-31 16:11:31,411 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 160 flow [2024-01-31 16:11:31,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:31,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:31,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:11:31,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:11:31,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:31,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1420680737, now seen corresponding path program 1 times [2024-01-31 16:11:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:31,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183051832] [2024-01-31 16:11:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183051832] [2024-01-31 16:11:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183051832] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:31,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:31,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:31,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215180021] [2024-01-31 16:11:31,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:31,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:31,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 93 [2024-01-31 16:11:31,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:31,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:31,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 93 [2024-01-31 16:11:31,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:32,591 INFO L124 PetriNetUnfolderBase]: 10232/16851 cut-off events. [2024-01-31 16:11:32,591 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-01-31 16:11:32,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29398 conditions, 16851 events. 10232/16851 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 131581 event pairs, 1904 based on Foata normal form. 1/9483 useless extension candidates. Maximal degree in co-relation 29383. Up to 11409 conditions per place. [2024-01-31 16:11:32,684 INFO L140 encePairwiseOnDemand]: 81/93 looper letters, 59 selfloop transitions, 3 changer transitions 1/96 dead transitions. [2024-01-31 16:11:32,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 337 flow [2024-01-31 16:11:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2024-01-31 16:11:32,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989247311827957 [2024-01-31 16:11:32,685 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 160 flow. Second operand 3 states and 195 transitions. [2024-01-31 16:11:32,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 337 flow [2024-01-31 16:11:32,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:32,688 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 183 flow [2024-01-31 16:11:32,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-01-31 16:11:32,690 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -17 predicate places. [2024-01-31 16:11:32,690 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 183 flow [2024-01-31 16:11:32,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:32,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:32,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:11:32,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:32,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1869512868, now seen corresponding path program 1 times [2024-01-31 16:11:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:32,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986043145] [2024-01-31 16:11:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:32,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:32,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986043145] [2024-01-31 16:11:32,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986043145] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:32,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:32,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315181587] [2024-01-31 16:11:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:32,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:32,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:32,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2024-01-31 16:11:32,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:32,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:32,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2024-01-31 16:11:32,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:33,600 INFO L124 PetriNetUnfolderBase]: 9637/14546 cut-off events. [2024-01-31 16:11:33,600 INFO L125 PetriNetUnfolderBase]: For 1771/1771 co-relation queries the response was YES. [2024-01-31 16:11:33,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31478 conditions, 14546 events. 9637/14546 cut-off events. For 1771/1771 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 96717 event pairs, 4005 based on Foata normal form. 784/11660 useless extension candidates. Maximal degree in co-relation 8851. Up to 10614 conditions per place. [2024-01-31 16:11:33,710 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 60 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2024-01-31 16:11:33,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 91 transitions, 359 flow [2024-01-31 16:11:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 218 transitions. [2024-01-31 16:11:33,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860215053763441 [2024-01-31 16:11:33,711 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 183 flow. Second operand 4 states and 218 transitions. [2024-01-31 16:11:33,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 91 transitions, 359 flow [2024-01-31 16:11:33,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:33,716 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 178 flow [2024-01-31 16:11:33,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-01-31 16:11:33,720 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -18 predicate places. [2024-01-31 16:11:33,720 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 178 flow [2024-01-31 16:11:33,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:33,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:33,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:11:33,721 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:33,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1308108522, now seen corresponding path program 1 times [2024-01-31 16:11:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:33,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422618840] [2024-01-31 16:11:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:33,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:33,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:33,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422618840] [2024-01-31 16:11:33,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422618840] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:33,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:33,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:33,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398004207] [2024-01-31 16:11:33,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:33,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:33,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:33,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2024-01-31 16:11:33,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:33,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:33,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2024-01-31 16:11:33,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:34,677 INFO L124 PetriNetUnfolderBase]: 9272/13909 cut-off events. [2024-01-31 16:11:34,678 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2024-01-31 16:11:34,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30046 conditions, 13909 events. 9272/13909 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 92409 event pairs, 3564 based on Foata normal form. 884/11284 useless extension candidates. Maximal degree in co-relation 30021. Up to 9711 conditions per place. [2024-01-31 16:11:34,750 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 66 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-31 16:11:34,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 385 flow [2024-01-31 16:11:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 222 transitions. [2024-01-31 16:11:34,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5967741935483871 [2024-01-31 16:11:34,754 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 178 flow. Second operand 4 states and 222 transitions. [2024-01-31 16:11:34,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 385 flow [2024-01-31 16:11:34,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:34,758 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 173 flow [2024-01-31 16:11:34,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-01-31 16:11:34,759 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -20 predicate places. [2024-01-31 16:11:34,760 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 173 flow [2024-01-31 16:11:34,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:34,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:34,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:34,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:11:34,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:34,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1816350265, now seen corresponding path program 1 times [2024-01-31 16:11:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:34,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864617446] [2024-01-31 16:11:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:34,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:34,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864617446] [2024-01-31 16:11:34,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864617446] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:34,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:34,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:11:34,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110854118] [2024-01-31 16:11:34,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:34,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:34,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:34,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:34,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:34,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:34,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:35,872 INFO L124 PetriNetUnfolderBase]: 13064/20629 cut-off events. [2024-01-31 16:11:35,872 INFO L125 PetriNetUnfolderBase]: For 1658/1956 co-relation queries the response was YES. [2024-01-31 16:11:35,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43350 conditions, 20629 events. 13064/20629 cut-off events. For 1658/1956 co-relation queries the response was YES. Maximal size of possible extension queue 1335. Compared 157095 event pairs, 2075 based on Foata normal form. 109/15182 useless extension candidates. Maximal degree in co-relation 38531. Up to 14487 conditions per place. [2024-01-31 16:11:36,017 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 76 selfloop transitions, 5 changer transitions 1/106 dead transitions. [2024-01-31 16:11:36,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 430 flow [2024-01-31 16:11:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-01-31 16:11:36,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209677419354839 [2024-01-31 16:11:36,019 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 173 flow. Second operand 4 states and 231 transitions. [2024-01-31 16:11:36,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 430 flow [2024-01-31 16:11:36,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:36,021 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 196 flow [2024-01-31 16:11:36,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-01-31 16:11:36,021 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -17 predicate places. [2024-01-31 16:11:36,021 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 196 flow [2024-01-31 16:11:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:36,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:36,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:36,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:11:36,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:36,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1331103273, now seen corresponding path program 1 times [2024-01-31 16:11:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:36,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699187147] [2024-01-31 16:11:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:36,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:36,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699187147] [2024-01-31 16:11:36,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699187147] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:36,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:36,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:36,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390915528] [2024-01-31 16:11:36,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:36,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:36,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:36,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:36,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2024-01-31 16:11:36,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:36,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:36,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2024-01-31 16:11:36,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:36,830 INFO L124 PetriNetUnfolderBase]: 10055/14785 cut-off events. [2024-01-31 16:11:36,830 INFO L125 PetriNetUnfolderBase]: For 2863/2962 co-relation queries the response was YES. [2024-01-31 16:11:36,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33384 conditions, 14785 events. 10055/14785 cut-off events. For 2863/2962 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 94435 event pairs, 2975 based on Foata normal form. 1083/12268 useless extension candidates. Maximal degree in co-relation 33357. Up to 10803 conditions per place. [2024-01-31 16:11:36,920 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 70 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-01-31 16:11:36,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 96 transitions, 429 flow [2024-01-31 16:11:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 226 transitions. [2024-01-31 16:11:36,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075268817204301 [2024-01-31 16:11:36,921 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 196 flow. Second operand 4 states and 226 transitions. [2024-01-31 16:11:36,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 96 transitions, 429 flow [2024-01-31 16:11:36,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:36,923 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 186 flow [2024-01-31 16:11:36,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2024-01-31 16:11:36,924 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -19 predicate places. [2024-01-31 16:11:36,924 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 186 flow [2024-01-31 16:11:36,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:36,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:36,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:36,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:11:36,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:36,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1622115301, now seen corresponding path program 1 times [2024-01-31 16:11:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:36,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341841262] [2024-01-31 16:11:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:36,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:36,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:36,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341841262] [2024-01-31 16:11:36,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341841262] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:36,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:36,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:11:36,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75810792] [2024-01-31 16:11:36,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:36,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:36,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:36,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:37,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:37,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:37,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:37,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:37,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:38,166 INFO L124 PetriNetUnfolderBase]: 13255/19691 cut-off events. [2024-01-31 16:11:38,166 INFO L125 PetriNetUnfolderBase]: For 2893/3565 co-relation queries the response was YES. [2024-01-31 16:11:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44238 conditions, 19691 events. 13255/19691 cut-off events. For 2893/3565 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 138412 event pairs, 1933 based on Foata normal form. 194/14480 useless extension candidates. Maximal degree in co-relation 44212. Up to 15213 conditions per place. [2024-01-31 16:11:38,270 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 74 selfloop transitions, 8 changer transitions 1/105 dead transitions. [2024-01-31 16:11:38,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 105 transitions, 452 flow [2024-01-31 16:11:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-01-31 16:11:38,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182795698924731 [2024-01-31 16:11:38,271 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 186 flow. Second operand 4 states and 230 transitions. [2024-01-31 16:11:38,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 105 transitions, 452 flow [2024-01-31 16:11:38,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 105 transitions, 445 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:38,273 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 229 flow [2024-01-31 16:11:38,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-01-31 16:11:38,273 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -16 predicate places. [2024-01-31 16:11:38,273 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 229 flow [2024-01-31 16:11:38,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:38,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:38,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:38,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:11:38,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:38,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash -710852151, now seen corresponding path program 1 times [2024-01-31 16:11:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:38,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654701172] [2024-01-31 16:11:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:38,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:38,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654701172] [2024-01-31 16:11:38,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654701172] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:38,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:38,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:38,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955174268] [2024-01-31 16:11:38,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:38,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:38,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:38,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 93 [2024-01-31 16:11:38,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:38,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:38,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 93 [2024-01-31 16:11:38,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:39,324 INFO L124 PetriNetUnfolderBase]: 9425/14063 cut-off events. [2024-01-31 16:11:39,324 INFO L125 PetriNetUnfolderBase]: For 3768/4021 co-relation queries the response was YES. [2024-01-31 16:11:39,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32910 conditions, 14063 events. 9425/14063 cut-off events. For 3768/4021 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 102303 event pairs, 585 based on Foata normal form. 1043/12100 useless extension candidates. Maximal degree in co-relation 32881. Up to 8689 conditions per place. [2024-01-31 16:11:39,420 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 87 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-01-31 16:11:39,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 111 transitions, 594 flow [2024-01-31 16:11:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-01-31 16:11:39,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182795698924731 [2024-01-31 16:11:39,421 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 229 flow. Second operand 4 states and 230 transitions. [2024-01-31 16:11:39,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 111 transitions, 594 flow [2024-01-31 16:11:39,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:39,425 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 220 flow [2024-01-31 16:11:39,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-01-31 16:11:39,426 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -17 predicate places. [2024-01-31 16:11:39,426 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 220 flow [2024-01-31 16:11:39,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:39,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:39,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:39,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:11:39,426 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:39,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash -534836137, now seen corresponding path program 1 times [2024-01-31 16:11:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:39,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036915769] [2024-01-31 16:11:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:39,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:39,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036915769] [2024-01-31 16:11:39,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036915769] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:39,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:39,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:11:39,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950165682] [2024-01-31 16:11:39,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:39,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:39,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:39,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:39,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:39,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:39,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:39,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:39,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:40,693 INFO L124 PetriNetUnfolderBase]: 10849/15903 cut-off events. [2024-01-31 16:11:40,693 INFO L125 PetriNetUnfolderBase]: For 3514/3909 co-relation queries the response was YES. [2024-01-31 16:11:40,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37585 conditions, 15903 events. 10849/15903 cut-off events. For 3514/3909 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 114267 event pairs, 3923 based on Foata normal form. 233/12418 useless extension candidates. Maximal degree in co-relation 37556. Up to 13229 conditions per place. [2024-01-31 16:11:40,810 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 72 selfloop transitions, 10 changer transitions 1/103 dead transitions. [2024-01-31 16:11:40,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 481 flow [2024-01-31 16:11:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 227 transitions. [2024-01-31 16:11:40,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102150537634409 [2024-01-31 16:11:40,811 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 220 flow. Second operand 4 states and 227 transitions. [2024-01-31 16:11:40,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 481 flow [2024-01-31 16:11:40,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 474 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:40,815 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 268 flow [2024-01-31 16:11:40,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-01-31 16:11:40,816 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -14 predicate places. [2024-01-31 16:11:40,816 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 268 flow [2024-01-31 16:11:40,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:40,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:40,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:40,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:11:40,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:40,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash 538595567, now seen corresponding path program 1 times [2024-01-31 16:11:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:40,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127770440] [2024-01-31 16:11:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:40,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:40,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127770440] [2024-01-31 16:11:40,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127770440] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:40,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:40,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928393177] [2024-01-31 16:11:40,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:40,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:11:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:11:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:11:40,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:40,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:40,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:40,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:40,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:42,448 INFO L124 PetriNetUnfolderBase]: 15115/21613 cut-off events. [2024-01-31 16:11:42,448 INFO L125 PetriNetUnfolderBase]: For 6499/7731 co-relation queries the response was YES. [2024-01-31 16:11:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52995 conditions, 21613 events. 15115/21613 cut-off events. For 6499/7731 co-relation queries the response was YES. Maximal size of possible extension queue 1744. Compared 147170 event pairs, 2505 based on Foata normal form. 364/16904 useless extension candidates. Maximal degree in co-relation 48551. Up to 15231 conditions per place. [2024-01-31 16:11:42,613 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 97 selfloop transitions, 13 changer transitions 1/131 dead transitions. [2024-01-31 16:11:42,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 647 flow [2024-01-31 16:11:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 294 transitions. [2024-01-31 16:11:42,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632258064516129 [2024-01-31 16:11:42,614 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 268 flow. Second operand 5 states and 294 transitions. [2024-01-31 16:11:42,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 647 flow [2024-01-31 16:11:42,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:42,623 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 316 flow [2024-01-31 16:11:42,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2024-01-31 16:11:42,777 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -10 predicate places. [2024-01-31 16:11:42,777 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 316 flow [2024-01-31 16:11:42,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:42,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:42,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:42,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:11:42,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:42,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1487921925, now seen corresponding path program 1 times [2024-01-31 16:11:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:42,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112113716] [2024-01-31 16:11:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:42,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112113716] [2024-01-31 16:11:42,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112113716] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:42,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:42,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:11:42,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828732274] [2024-01-31 16:11:42,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:42,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:42,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:42,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:42,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:42,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:42,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:42,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:44,241 INFO L124 PetriNetUnfolderBase]: 17485/23430 cut-off events. [2024-01-31 16:11:44,242 INFO L125 PetriNetUnfolderBase]: For 18090/19685 co-relation queries the response was YES. [2024-01-31 16:11:44,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66383 conditions, 23430 events. 17485/23430 cut-off events. For 18090/19685 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 140474 event pairs, 4449 based on Foata normal form. 199/20939 useless extension candidates. Maximal degree in co-relation 66349. Up to 21237 conditions per place. [2024-01-31 16:11:44,442 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 69 selfloop transitions, 18 changer transitions 5/113 dead transitions. [2024-01-31 16:11:44,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 113 transitions, 665 flow [2024-01-31 16:11:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 226 transitions. [2024-01-31 16:11:44,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075268817204301 [2024-01-31 16:11:44,443 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 316 flow. Second operand 4 states and 226 transitions. [2024-01-31 16:11:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 113 transitions, 665 flow [2024-01-31 16:11:44,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 113 transitions, 634 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:44,460 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 438 flow [2024-01-31 16:11:44,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2024-01-31 16:11:44,461 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -8 predicate places. [2024-01-31 16:11:44,461 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 438 flow [2024-01-31 16:11:44,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:44,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:44,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:44,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:11:44,461 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:44,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash 738457924, now seen corresponding path program 1 times [2024-01-31 16:11:44,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:44,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827730611] [2024-01-31 16:11:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:44,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:44,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827730611] [2024-01-31 16:11:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827730611] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:44,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:44,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:44,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989483213] [2024-01-31 16:11:44,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:11:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:11:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:11:44,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:44,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:44,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:44,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:44,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:46,616 INFO L124 PetriNetUnfolderBase]: 22184/29498 cut-off events. [2024-01-31 16:11:46,616 INFO L125 PetriNetUnfolderBase]: For 23999/25597 co-relation queries the response was YES. [2024-01-31 16:11:46,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83927 conditions, 29498 events. 22184/29498 cut-off events. For 23999/25597 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 174347 event pairs, 3951 based on Foata normal form. 315/26666 useless extension candidates. Maximal degree in co-relation 83891. Up to 20259 conditions per place. [2024-01-31 16:11:46,789 INFO L140 encePairwiseOnDemand]: 86/93 looper letters, 106 selfloop transitions, 24 changer transitions 0/151 dead transitions. [2024-01-31 16:11:46,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 151 transitions, 906 flow [2024-01-31 16:11:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 299 transitions. [2024-01-31 16:11:46,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6430107526881721 [2024-01-31 16:11:46,791 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 438 flow. Second operand 5 states and 299 transitions. [2024-01-31 16:11:46,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 151 transitions, 906 flow [2024-01-31 16:11:46,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 889 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:46,819 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 544 flow [2024-01-31 16:11:46,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2024-01-31 16:11:46,819 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2024-01-31 16:11:46,819 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 544 flow [2024-01-31 16:11:46,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:46,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 16:11:46,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:46,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:46,820 INFO L85 PathProgramCache]: Analyzing trace with hash 799965390, now seen corresponding path program 1 times [2024-01-31 16:11:46,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:46,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614014] [2024-01-31 16:11:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:46,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:46,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614014] [2024-01-31 16:11:46,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614014] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:46,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:46,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:46,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563449908] [2024-01-31 16:11:46,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:46,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:11:46,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:46,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:11:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:11:46,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:46,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:46,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:46,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:46,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:48,872 INFO L124 PetriNetUnfolderBase]: 22554/29915 cut-off events. [2024-01-31 16:11:48,872 INFO L125 PetriNetUnfolderBase]: For 37167/38673 co-relation queries the response was YES. [2024-01-31 16:11:48,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91894 conditions, 29915 events. 22554/29915 cut-off events. For 37167/38673 co-relation queries the response was YES. Maximal size of possible extension queue 1860. Compared 174979 event pairs, 5303 based on Foata normal form. 391/27571 useless extension candidates. Maximal degree in co-relation 91854. Up to 26194 conditions per place. [2024-01-31 16:11:49,138 INFO L140 encePairwiseOnDemand]: 85/93 looper letters, 98 selfloop transitions, 22 changer transitions 3/144 dead transitions. [2024-01-31 16:11:49,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 144 transitions, 946 flow [2024-01-31 16:11:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 288 transitions. [2024-01-31 16:11:49,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193548387096774 [2024-01-31 16:11:49,139 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 544 flow. Second operand 5 states and 288 transitions. [2024-01-31 16:11:49,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 144 transitions, 946 flow [2024-01-31 16:11:49,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 924 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:49,185 INFO L231 Difference]: Finished difference. Result has 95 places, 94 transitions, 619 flow [2024-01-31 16:11:49,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=619, PETRI_PLACES=95, PETRI_TRANSITIONS=94} [2024-01-31 16:11:49,186 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 2 predicate places. [2024-01-31 16:11:49,186 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 94 transitions, 619 flow [2024-01-31 16:11:49,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:49,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:49,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 16:11:49,186 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:49,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1564422738, now seen corresponding path program 2 times [2024-01-31 16:11:49,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033900028] [2024-01-31 16:11:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033900028] [2024-01-31 16:11:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033900028] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291539189] [2024-01-31 16:11:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:11:49,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:11:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:11:49,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:49,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 94 transitions, 619 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:49,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:51,547 INFO L124 PetriNetUnfolderBase]: 24165/32520 cut-off events. [2024-01-31 16:11:51,547 INFO L125 PetriNetUnfolderBase]: For 52345/54045 co-relation queries the response was YES. [2024-01-31 16:11:51,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102844 conditions, 32520 events. 24165/32520 cut-off events. For 52345/54045 co-relation queries the response was YES. Maximal size of possible extension queue 2050. Compared 198758 event pairs, 3867 based on Foata normal form. 354/29952 useless extension candidates. Maximal degree in co-relation 102802. Up to 20595 conditions per place. [2024-01-31 16:11:51,824 INFO L140 encePairwiseOnDemand]: 83/93 looper letters, 106 selfloop transitions, 38 changer transitions 3/168 dead transitions. [2024-01-31 16:11:51,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 168 transitions, 1180 flow [2024-01-31 16:11:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 305 transitions. [2024-01-31 16:11:51,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2024-01-31 16:11:51,825 INFO L175 Difference]: Start difference. First operand has 95 places, 94 transitions, 619 flow. Second operand 5 states and 305 transitions. [2024-01-31 16:11:51,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 168 transitions, 1180 flow [2024-01-31 16:11:51,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 168 transitions, 1136 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:51,881 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 768 flow [2024-01-31 16:11:51,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=768, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-01-31 16:11:51,882 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 5 predicate places. [2024-01-31 16:11:51,882 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 768 flow [2024-01-31 16:11:51,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:51,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:51,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:51,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 16:11:51,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:51,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2030056736, now seen corresponding path program 2 times [2024-01-31 16:11:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722233727] [2024-01-31 16:11:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722233727] [2024-01-31 16:11:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722233727] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:51,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405431717] [2024-01-31 16:11:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:51,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:11:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:11:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:11:52,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 768 flow. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:52,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:52,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:52,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:54,895 INFO L124 PetriNetUnfolderBase]: 26254/34978 cut-off events. [2024-01-31 16:11:54,895 INFO L125 PetriNetUnfolderBase]: For 78495/80436 co-relation queries the response was YES. [2024-01-31 16:11:55,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120150 conditions, 34978 events. 26254/34978 cut-off events. For 78495/80436 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 209338 event pairs, 5357 based on Foata normal form. 582/32666 useless extension candidates. Maximal degree in co-relation 120106. Up to 28426 conditions per place. [2024-01-31 16:11:55,188 INFO L140 encePairwiseOnDemand]: 83/93 looper letters, 116 selfloop transitions, 35 changer transitions 3/175 dead transitions. [2024-01-31 16:11:55,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 175 transitions, 1341 flow [2024-01-31 16:11:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 305 transitions. [2024-01-31 16:11:55,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2024-01-31 16:11:55,190 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 768 flow. Second operand 5 states and 305 transitions. [2024-01-31 16:11:55,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 175 transitions, 1341 flow [2024-01-31 16:11:55,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 1249 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:55,281 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 902 flow [2024-01-31 16:11:55,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=902, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-01-31 16:11:55,281 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 7 predicate places. [2024-01-31 16:11:55,281 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 902 flow [2024-01-31 16:11:55,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:55,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:55,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:55,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-31 16:11:55,282 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:11:55,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:55,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1740276415, now seen corresponding path program 1 times [2024-01-31 16:11:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:55,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110025121] [2024-01-31 16:11:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:55,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110025121] [2024-01-31 16:11:55,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110025121] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:55,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:55,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:55,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520556020] [2024-01-31 16:11:55,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:55,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:11:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:11:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:11:55,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:11:55,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 902 flow. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:55,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:55,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:11:55,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:59,462 INFO L124 PetriNetUnfolderBase]: 31468/42750 cut-off events. [2024-01-31 16:11:59,463 INFO L125 PetriNetUnfolderBase]: For 130472/138119 co-relation queries the response was YES. [2024-01-31 16:11:59,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157807 conditions, 42750 events. 31468/42750 cut-off events. For 130472/138119 co-relation queries the response was YES. Maximal size of possible extension queue 2720. Compared 279431 event pairs, 9751 based on Foata normal form. 2483/42318 useless extension candidates. Maximal degree in co-relation 157762. Up to 35181 conditions per place. [2024-01-31 16:11:59,974 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 121 selfloop transitions, 21 changer transitions 3/170 dead transitions. [2024-01-31 16:11:59,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1378 flow [2024-01-31 16:11:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:11:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:11:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 290 transitions. [2024-01-31 16:11:59,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-01-31 16:11:59,976 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 902 flow. Second operand 5 states and 290 transitions. [2024-01-31 16:11:59,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1378 flow [2024-01-31 16:12:00,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 170 transitions, 1335 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:12:00,257 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 946 flow [2024-01-31 16:12:00,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=946, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-01-31 16:12:00,258 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 10 predicate places. [2024-01-31 16:12:00,258 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 946 flow [2024-01-31 16:12:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:00,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:00,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:12:00,258 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:12:00,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -169643998, now seen corresponding path program 1 times [2024-01-31 16:12:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395330142] [2024-01-31 16:12:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:00,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395330142] [2024-01-31 16:12:00,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395330142] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:00,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:00,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:12:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054750298] [2024-01-31 16:12:00,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:00,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:12:00,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:12:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:12:00,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:12:00,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 946 flow. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:00,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:00,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:12:00,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:04,472 INFO L124 PetriNetUnfolderBase]: 33908/47417 cut-off events. [2024-01-31 16:12:04,473 INFO L125 PetriNetUnfolderBase]: For 167155/176150 co-relation queries the response was YES. [2024-01-31 16:12:04,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179643 conditions, 47417 events. 33908/47417 cut-off events. For 167155/176150 co-relation queries the response was YES. Maximal size of possible extension queue 3149. Compared 335327 event pairs, 7952 based on Foata normal form. 2925/47266 useless extension candidates. Maximal degree in co-relation 179597. Up to 28169 conditions per place. [2024-01-31 16:12:04,865 INFO L140 encePairwiseOnDemand]: 84/93 looper letters, 120 selfloop transitions, 64 changer transitions 3/212 dead transitions. [2024-01-31 16:12:04,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 212 transitions, 1868 flow [2024-01-31 16:12:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:12:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:12:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 302 transitions. [2024-01-31 16:12:04,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494623655913978 [2024-01-31 16:12:04,867 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 946 flow. Second operand 5 states and 302 transitions. [2024-01-31 16:12:04,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 212 transitions, 1868 flow [2024-01-31 16:12:05,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 212 transitions, 1835 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-31 16:12:05,162 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1369 flow [2024-01-31 16:12:05,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1369, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-01-31 16:12:05,162 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 13 predicate places. [2024-01-31 16:12:05,163 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1369 flow [2024-01-31 16:12:05,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:05,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:05,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:12:05,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-31 16:12:05,163 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 60 more)] === [2024-01-31 16:12:05,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash 317994318, now seen corresponding path program 2 times [2024-01-31 16:12:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682543834] [2024-01-31 16:12:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:05,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:05,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682543834] [2024-01-31 16:12:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682543834] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:05,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:05,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:12:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825629017] [2024-01-31 16:12:05,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:05,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:12:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:12:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:12:05,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 93 [2024-01-31 16:12:05,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1369 flow. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:05,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:05,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 93 [2024-01-31 16:12:05,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand