./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_87-lists_racefree.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/goblint-regression/28-race_reach_87-lists_racefree.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_87-lists_racefree.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:27:53,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:27:53,750 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:27:53,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:27:53,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:27:53,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:27:53,768 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:27:53,768 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:27:53,768 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:27:53,769 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:27:53,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:27:53,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:27:53,769 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:27:53,770 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:27:53,770 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:27:53,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:27:53,770 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:27:53,771 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:27:53,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:27:53,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:27:53,771 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:27:53,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:27:53,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:27:53,772 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:27:53,772 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:27:53,772 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:27:53,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:27:53,773 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:27:53,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:27:53,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:27:53,773 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:27:53,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:27:53,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:27:53,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:27:53,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:27:53,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:27:53,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:27:53,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:27:53,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:27:53,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:27:53,775 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:27:53,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:27:53,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:27:53,776 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:27:53,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:27:53,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:27:53,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:27:53,987 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:27:53,988 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:27:53,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_87-lists_racefree.yml/witness.yml [2024-02-07 14:27:54,060 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:27:54,060 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:27:54,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2024-02-07 14:27:55,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:27:55,308 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:27:55,308 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2024-02-07 14:27:55,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df113d6b4/8aa7611606984c44b303c6ee61b794f7/FLAG0d7f17308 [2024-02-07 14:27:55,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df113d6b4/8aa7611606984c44b303c6ee61b794f7 [2024-02-07 14:27:55,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:27:55,346 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:27:55,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:27:55,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:27:55,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:27:55,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:27:54" (1/2) ... [2024-02-07 14:27:55,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600431ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:27:55, skipping insertion in model container [2024-02-07 14:27:55,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:27:54" (1/2) ... [2024-02-07 14:27:55,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d45473e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:27:55, skipping insertion in model container [2024-02-07 14:27:55,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:27:55" (2/2) ... [2024-02-07 14:27:55,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600431ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:55, skipping insertion in model container [2024-02-07 14:27:55,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:27:55" (2/2) ... [2024-02-07 14:27:55,355 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:27:55,406 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:27:55,407 INFO L76 edCorrectnessWitness]: Location invariant before [L1032-L1032] (-255 <= i) && (i <= 255) [2024-02-07 14:27:55,407 INFO L76 edCorrectnessWitness]: Location invariant before [L1047-L1047] (((((((7 <= i && i <= 255) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 14:27:55,407 INFO L76 edCorrectnessWitness]: Location invariant before [L1049-L1049] (((((((7 <= i && i <= 255) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 14:27:55,408 INFO L76 edCorrectnessWitness]: Location invariant before [L1054-L1054] ((((((((((((((((((((((((i == 18 || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19 [2024-02-07 14:27:55,408 INFO L76 edCorrectnessWitness]: Location invariant before [L1053-L1053] (((((((((((((((((((((((((25 <= i && i <= 9999) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 14:27:55,408 INFO L76 edCorrectnessWitness]: Location invariant before [L1038-L1038] (-255 <= i) && (i <= 255) [2024-02-07 14:27:55,408 INFO L76 edCorrectnessWitness]: Location invariant after [L1054-L1054] ((((((((((((((((((((((((i == 18 || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19 [2024-02-07 14:27:55,408 INFO L76 edCorrectnessWitness]: Location invariant after [L1039-L1039] (-255 <= i) && (i <= 255) [2024-02-07 14:27:55,408 INFO L76 edCorrectnessWitness]: Location invariant before [L1033-L1033] (-255 <= i) && (i <= 255) [2024-02-07 14:27:55,408 INFO L76 edCorrectnessWitness]: Location invariant before [L1051-L1051] (((((((((((((((((((((((((25 <= i && i <= 9999) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 14:27:55,409 INFO L76 edCorrectnessWitness]: Location invariant after [L1053-L1053] (((((((((((((((((((((((((25 <= i && i <= 9999) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 14:27:55,409 INFO L76 edCorrectnessWitness]: Location invariant after [L1052-L1052] ((((((((((((((((((((((((i == 7 || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8 [2024-02-07 14:27:55,409 INFO L76 edCorrectnessWitness]: Location invariant before [L1052-L1052] ((((((((((((((((((((((((i == 7 || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8 [2024-02-07 14:27:55,409 INFO L76 edCorrectnessWitness]: Location invariant before [L1039-L1039] (-255 <= i) && (i <= 255) [2024-02-07 14:27:55,409 INFO L76 edCorrectnessWitness]: Location invariant after [L1051-L1051] (((((((((((((((((((((((((25 <= i && i <= 9999) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0) [2024-02-07 14:27:55,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:27:55,777 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2024-02-07 14:27:55,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:27:55,875 INFO L203 MainTranslator]: Completed pre-run [2024-02-07 14:27:55,919 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:27:55,956 WARN L423 MainDispatcher]: Unable to annotate struct s with a witness entry [2024-02-07 14:27:55,958 WARN L423 MainDispatcher]: Unable to annotate *p = take(buckets[i]) with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:27:55,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:27:56,043 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:27:56,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56 WrapperNode [2024-02-07 14:27:56,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:27:56,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:27:56,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:27:56,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:27:56,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,124 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 260 [2024-02-07 14:27:56,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:27:56,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:27:56,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:27:56,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:27:56,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,179 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [2, 5, 4, 5, 1, 14, 2, 2]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 5, 0, 0, 0, 0]. The 13 writes are split as follows [0, 0, 2, 0, 1, 8, 1, 1]. [2024-02-07 14:27:56,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,241 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:27:56,242 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:27:56,243 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:27:56,243 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:27:56,244 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (1/1) ... [2024-02-07 14:27:56,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:27:56,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:27:56,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:27:56,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:27:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:27:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-02-07 14:27:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-02-07 14:27:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-02-07 14:27:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-02-07 14:27:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-02-07 14:27:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-02-07 14:27:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-02-07 14:27:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-02-07 14:27:56,300 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:27:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-02-07 14:27:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-02-07 14:27:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-02-07 14:27:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-02-07 14:27:56,301 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-02-07 14:27:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:27:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:27:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:27:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:27:56,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-02-07 14:27:56,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:27:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:27:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:27:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:27:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:27:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-02-07 14:27:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-02-07 14:27:56,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-02-07 14:27:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:27:56,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:27:56,306 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:27:56,464 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:27:56,465 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:27:56,712 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:27:56,713 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:27:56,924 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:27:56,925 INFO L320 CfgBuilder]: Removed 16 assume(true) statements. [2024-02-07 14:27:56,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:27:56 BoogieIcfgContainer [2024-02-07 14:27:56,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:27:56,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:27:56,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:27:56,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:27:56,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:27:54" (1/4) ... [2024-02-07 14:27:56,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af68feb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:27:56, skipping insertion in model container [2024-02-07 14:27:56,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:27:55" (2/4) ... [2024-02-07 14:27:56,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af68feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:27:56, skipping insertion in model container [2024-02-07 14:27:56,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:27:56" (3/4) ... [2024-02-07 14:27:56,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af68feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:27:56, skipping insertion in model container [2024-02-07 14:27:56,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:27:56" (4/4) ... [2024-02-07 14:27:56,934 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2024-02-07 14:27:56,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:27:56,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-02-07 14:27:56,950 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:27:57,016 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 14:27:57,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 95 transitions, 210 flow [2024-02-07 14:27:57,130 INFO L124 PetriNetUnfolderBase]: 37/187 cut-off events. [2024-02-07 14:27:57,130 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-02-07 14:27:57,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 187 events. 37/187 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 755 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 94. Up to 8 conditions per place. [2024-02-07 14:27:57,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 95 transitions, 210 flow [2024-02-07 14:27:57,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 95 transitions, 210 flow [2024-02-07 14:27:57,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:27:57,162 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;@86f5c39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:27:57,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-02-07 14:27:57,164 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:27:57,164 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-02-07 14:27:57,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:27:57,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:57,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 14:27:57,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:27:57,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:57,170 INFO L85 PathProgramCache]: Analyzing trace with hash 685057, now seen corresponding path program 1 times [2024-02-07 14:27:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:57,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601223543] [2024-02-07 14:27:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:57,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:27:57,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601223543] [2024-02-07 14:27:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601223543] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:27:57,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:27:57,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:27:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658899320] [2024-02-07 14:27:57,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:27:57,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:27:57,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:27:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:27:57,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:27:57,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 95 [2024-02-07 14:27:57,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:57,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:27:57,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 95 [2024-02-07 14:27:57,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:27:58,287 INFO L124 PetriNetUnfolderBase]: 3738/7106 cut-off events. [2024-02-07 14:27:58,288 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-02-07 14:27:58,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13117 conditions, 7106 events. 3738/7106 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 46045 event pairs, 3497 based on Foata normal form. 596/6732 useless extension candidates. Maximal degree in co-relation 11450. Up to 5916 conditions per place. [2024-02-07 14:27:58,320 INFO L140 encePairwiseOnDemand]: 78/95 looper letters, 60 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-02-07 14:27:58,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 85 transitions, 314 flow [2024-02-07 14:27:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:27:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:27:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-02-07 14:27:58,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2024-02-07 14:27:58,333 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 210 flow. Second operand 3 states and 146 transitions. [2024-02-07 14:27:58,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 85 transitions, 314 flow [2024-02-07 14:27:58,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:27:58,346 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 202 flow [2024-02-07 14:27:58,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2024-02-07 14:27:58,351 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2024-02-07 14:27:58,355 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 202 flow [2024-02-07 14:27:58,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:58,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:58,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-07 14:27:58,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:27:58,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:27:58,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1065596233, now seen corresponding path program 1 times [2024-02-07 14:27:58,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:58,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57644648] [2024-02-07 14:27:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:58,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:58,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:27:58,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57644648] [2024-02-07 14:27:58,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57644648] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:27:58,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:27:58,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:27:58,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245688259] [2024-02-07 14:27:58,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:27:58,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:27:58,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:27:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:27:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:27:58,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 95 [2024-02-07 14:27:58,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:58,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:27:58,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 95 [2024-02-07 14:27:58,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:27:59,163 INFO L124 PetriNetUnfolderBase]: 3738/7104 cut-off events. [2024-02-07 14:27:59,164 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-02-07 14:27:59,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13122 conditions, 7104 events. 3738/7104 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 46035 event pairs, 3497 based on Foata normal form. 1/6137 useless extension candidates. Maximal degree in co-relation 13105. Up to 5911 conditions per place. [2024-02-07 14:27:59,195 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 57 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-02-07 14:27:59,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 322 flow [2024-02-07 14:27:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:27:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:27:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-02-07 14:27:59,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663157894736842 [2024-02-07 14:27:59,197 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 202 flow. Second operand 5 states and 174 transitions. [2024-02-07 14:27:59,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 322 flow [2024-02-07 14:27:59,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:27:59,200 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 210 flow [2024-02-07 14:27:59,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2024-02-07 14:27:59,201 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2024-02-07 14:27:59,201 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 210 flow [2024-02-07 14:27:59,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:59,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:59,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:27:59,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:27:59,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:27:59,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1072318476, now seen corresponding path program 1 times [2024-02-07 14:27:59,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:59,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418192883] [2024-02-07 14:27:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:59,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:59,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:27:59,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418192883] [2024-02-07 14:27:59,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418192883] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:27:59,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618016075] [2024-02-07 14:27:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:59,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:27:59,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:27:59,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:27:59,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:27:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:59,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:27:59,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:27:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:59,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:27:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:59,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618016075] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:27:59,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:27:59,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-02-07 14:27:59,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901766766] [2024-02-07 14:27:59,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:27:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:27:59,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:27:59,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:27:59,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:27:59,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 95 [2024-02-07 14:27:59,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:59,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:27:59,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 95 [2024-02-07 14:27:59,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:00,177 INFO L124 PetriNetUnfolderBase]: 3738/7111 cut-off events. [2024-02-07 14:28:00,178 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2024-02-07 14:28:00,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13154 conditions, 7111 events. 3738/7111 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 46012 event pairs, 3497 based on Foata normal form. 3/6146 useless extension candidates. Maximal degree in co-relation 13095. Up to 5912 conditions per place. [2024-02-07 14:28:00,215 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 63 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2024-02-07 14:28:00,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 383 flow [2024-02-07 14:28:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:28:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:28:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-02-07 14:28:00,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35789473684210527 [2024-02-07 14:28:00,220 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 210 flow. Second operand 6 states and 204 transitions. [2024-02-07 14:28:00,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 383 flow [2024-02-07 14:28:00,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 369 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-02-07 14:28:00,225 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 245 flow [2024-02-07 14:28:00,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2024-02-07 14:28:00,226 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 11 predicate places. [2024-02-07 14:28:00,226 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 245 flow [2024-02-07 14:28:00,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:00,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:00,227 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:00,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:28:00,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:00,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:28:00,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:00,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1342572054, now seen corresponding path program 2 times [2024-02-07 14:28:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:00,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410470743] [2024-02-07 14:28:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:00,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:28:00,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:00,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410470743] [2024-02-07 14:28:00,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410470743] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:00,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342164009] [2024-02-07 14:28:00,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:28:00,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:00,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:00,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:28:00,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:28:00,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 14:28:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:28:00,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-07 14:28:00,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-02-07 14:28:00,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:28:00,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342164009] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:00,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:28:00,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-02-07 14:28:00,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592481022] [2024-02-07 14:28:00,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:00,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:28:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:28:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:28:00,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 95 [2024-02-07 14:28:00,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:00,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 95 [2024-02-07 14:28:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:00,833 INFO L124 PetriNetUnfolderBase]: 22/79 cut-off events. [2024-02-07 14:28:00,833 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-02-07 14:28:00,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 79 events. 22/79 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 188 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 177. Up to 45 conditions per place. [2024-02-07 14:28:00,834 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-02-07 14:28:00,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 173 flow [2024-02-07 14:28:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:28:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:28:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-02-07 14:28:00,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32105263157894737 [2024-02-07 14:28:00,835 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 245 flow. Second operand 4 states and 122 transitions. [2024-02-07 14:28:00,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 173 flow [2024-02-07 14:28:00,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:28:00,838 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 107 flow [2024-02-07 14:28:00,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2024-02-07 14:28:00,839 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -44 predicate places. [2024-02-07 14:28:00,839 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 107 flow [2024-02-07 14:28:00,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:00,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:00,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:00,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:28:01,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-02-07 14:28:01,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:28:01,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1342569953, now seen corresponding path program 1 times [2024-02-07 14:28:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:01,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141266965] [2024-02-07 14:28:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:01,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:28:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:01,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141266965] [2024-02-07 14:28:01,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141266965] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394752645] [2024-02-07 14:28:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:01,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:28:01,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:28:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:01,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:28:01,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:28:01,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:28:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:28:01,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394752645] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:28:01,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:28:01,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-02-07 14:28:01,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685290853] [2024-02-07 14:28:01,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:28:01,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:28:01,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:28:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:28:01,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 95 [2024-02-07 14:28:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 107 flow. Second operand has 12 states, 12 states have (on average 24.583333333333332) internal successors, (295), 12 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:01,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:01,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 95 [2024-02-07 14:28:01,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:01,582 INFO L124 PetriNetUnfolderBase]: 22/95 cut-off events. [2024-02-07 14:28:01,582 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-02-07 14:28:01,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 95 events. 22/95 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 156 event pairs, 21 based on Foata normal form. 6/101 useless extension candidates. Maximal degree in co-relation 266. Up to 57 conditions per place. [2024-02-07 14:28:01,583 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 32 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2024-02-07 14:28:01,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 335 flow [2024-02-07 14:28:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:28:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:28:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 314 transitions. [2024-02-07 14:28:01,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2754385964912281 [2024-02-07 14:28:01,585 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 107 flow. Second operand 12 states and 314 transitions. [2024-02-07 14:28:01,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 335 flow [2024-02-07 14:28:01,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:28:01,586 INFO L231 Difference]: Finished difference. Result has 53 places, 31 transitions, 221 flow [2024-02-07 14:28:01,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=31} [2024-02-07 14:28:01,587 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -28 predicate places. [2024-02-07 14:28:01,587 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 31 transitions, 221 flow [2024-02-07 14:28:01,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.583333333333332) internal successors, (295), 12 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:01,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:01,588 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:01,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 14:28:01,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:01,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:28:01,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash -397310625, now seen corresponding path program 2 times [2024-02-07 14:28:01,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:01,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113402630] [2024-02-07 14:28:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:01,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:28:02,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:02,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113402630] [2024-02-07 14:28:02,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113402630] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:02,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143732529] [2024-02-07 14:28:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:28:02,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:02,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:02,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:28:02,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:28:02,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 14:28:02,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:28:02,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:28:02,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-02-07 14:28:02,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:28:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143732529] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:28:02,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:28:02,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2024-02-07 14:28:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747126725] [2024-02-07 14:28:02,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:28:02,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:28:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:28:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:28:02,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 95 [2024-02-07 14:28:02,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 31 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:02,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:02,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 95 [2024-02-07 14:28:02,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:02,415 INFO L124 PetriNetUnfolderBase]: 22/88 cut-off events. [2024-02-07 14:28:02,415 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-02-07 14:28:02,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 88 events. 22/88 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 279. Up to 49 conditions per place. [2024-02-07 14:28:02,415 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 26 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2024-02-07 14:28:02,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 32 transitions, 278 flow [2024-02-07 14:28:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:28:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:28:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-02-07 14:28:02,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.312280701754386 [2024-02-07 14:28:02,416 INFO L175 Difference]: Start difference. First operand has 53 places, 31 transitions, 221 flow. Second operand 3 states and 89 transitions. [2024-02-07 14:28:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 32 transitions, 278 flow [2024-02-07 14:28:02,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 32 transitions, 272 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:28:02,419 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 213 flow [2024-02-07 14:28:02,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2024-02-07 14:28:02,422 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -31 predicate places. [2024-02-07 14:28:02,422 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 213 flow [2024-02-07 14:28:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:02,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:02,422 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:02,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:28:02,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:02,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:28:02,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash 434583211, now seen corresponding path program 1 times [2024-02-07 14:28:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:02,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660484175] [2024-02-07 14:28:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:02,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:28:02,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:02,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660484175] [2024-02-07 14:28:02,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660484175] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730725835] [2024-02-07 14:28:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:02,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:02,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:28:02,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:28:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:03,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:28:03,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:28:03,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:28:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:28:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730725835] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:28:03,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:28:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-02-07 14:28:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626360823] [2024-02-07 14:28:03,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:28:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-07 14:28:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-07 14:28:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-02-07 14:28:03,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 95 [2024-02-07 14:28:03,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 29 transitions, 213 flow. Second operand has 24 states, 24 states have (on average 24.833333333333332) internal successors, (596), 24 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:03,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:03,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 95 [2024-02-07 14:28:03,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:03,632 INFO L124 PetriNetUnfolderBase]: 22/126 cut-off events. [2024-02-07 14:28:03,632 INFO L125 PetriNetUnfolderBase]: For 576/576 co-relation queries the response was YES. [2024-02-07 14:28:03,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 126 events. 22/126 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 21 based on Foata normal form. 12/138 useless extension candidates. Maximal degree in co-relation 497. Up to 57 conditions per place. [2024-02-07 14:28:03,633 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 56 selfloop transitions, 24 changer transitions 0/81 dead transitions. [2024-02-07 14:28:03,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 796 flow [2024-02-07 14:28:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-07 14:28:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-07 14:28:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 620 transitions. [2024-02-07 14:28:03,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2719298245614035 [2024-02-07 14:28:03,635 INFO L175 Difference]: Start difference. First operand has 50 places, 29 transitions, 213 flow. Second operand 24 states and 620 transitions. [2024-02-07 14:28:03,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 796 flow [2024-02-07 14:28:03,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 795 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:28:03,638 INFO L231 Difference]: Finished difference. Result has 85 places, 42 transitions, 483 flow [2024-02-07 14:28:03,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=483, PETRI_PLACES=85, PETRI_TRANSITIONS=42} [2024-02-07 14:28:03,638 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 4 predicate places. [2024-02-07 14:28:03,638 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 42 transitions, 483 flow [2024-02-07 14:28:03,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 24.833333333333332) internal successors, (596), 24 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:03,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:03,639 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:03,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:28:03,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:03,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:28:03,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash 712486187, now seen corresponding path program 2 times [2024-02-07 14:28:03,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:03,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690576154] [2024-02-07 14:28:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:03,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:28:04,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:04,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690576154] [2024-02-07 14:28:04,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690576154] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:04,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442676133] [2024-02-07 14:28:04,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:28:04,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:04,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:04,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:28:04,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:28:05,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:28:05,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:28:05,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-07 14:28:05,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:28:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:28:05,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:28:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:28:05,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442676133] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:28:05,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:28:05,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2024-02-07 14:28:05,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974903210] [2024-02-07 14:28:05,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:28:05,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-02-07 14:28:05,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:28:05,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-02-07 14:28:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-02-07 14:28:06,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 95 [2024-02-07 14:28:06,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 42 transitions, 483 flow. Second operand has 48 states, 48 states have (on average 24.916666666666668) internal successors, (1196), 48 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:06,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:28:06,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 95 [2024-02-07 14:28:06,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:28:06,277 INFO L124 PetriNetUnfolderBase]: 22/197 cut-off events. [2024-02-07 14:28:06,277 INFO L125 PetriNetUnfolderBase]: For 5013/5013 co-relation queries the response was YES. [2024-02-07 14:28:06,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 197 events. 22/197 cut-off events. For 5013/5013 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 21 based on Foata normal form. 24/221 useless extension candidates. Maximal degree in co-relation 1062. Up to 57 conditions per place. [2024-02-07 14:28:06,278 INFO L140 encePairwiseOnDemand]: 91/95 looper letters, 104 selfloop transitions, 48 changer transitions 0/153 dead transitions. [2024-02-07 14:28:06,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 153 transitions, 1927 flow [2024-02-07 14:28:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-07 14:28:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-07 14:28:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1232 transitions. [2024-02-07 14:28:06,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27017543859649124 [2024-02-07 14:28:06,283 INFO L175 Difference]: Start difference. First operand has 85 places, 42 transitions, 483 flow. Second operand 48 states and 1232 transitions. [2024-02-07 14:28:06,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 153 transitions, 1927 flow [2024-02-07 14:28:06,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1909 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-02-07 14:28:06,292 INFO L231 Difference]: Finished difference. Result has 148 places, 67 transitions, 1088 flow [2024-02-07 14:28:06,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1088, PETRI_PLACES=148, PETRI_TRANSITIONS=67} [2024-02-07 14:28:06,292 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 67 predicate places. [2024-02-07 14:28:06,292 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 67 transitions, 1088 flow [2024-02-07 14:28:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 24.916666666666668) internal successors, (1196), 48 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:28:06,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:28:06,293 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 46, 46, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:28:06,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 14:28:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:06,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT, t2_funErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:28:06,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:28:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1701632555, now seen corresponding path program 3 times [2024-02-07 14:28:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:28:06,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90799225] [2024-02-07 14:28:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:28:06,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:28:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:28:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3153 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:28:09,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:28:09,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90799225] [2024-02-07 14:28:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90799225] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:28:09,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349174578] [2024-02-07 14:28:09,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:28:09,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:28:09,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:28:09,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:28:09,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15